The Johnson group explores a variety of topics in synthetic macromolecular chemistry and surface chemistry.

THE JOHNSON RESEARCH GROUP

About Jeremiah A. Johnson:

Jeremiah Johnson Photo

Contact Information:

Department of Chemistry
Massachusetts Institute of Technology
77 Massachusetts Avenue, Room 18-296
Cambridge, MA 02139-4307 USA

Phone: (617) 253-1819

Email: jaj2109@mit.edu



Experience:

2017-current
Firmenich Career Development Associate Professor (with Tenure),
Department of Chemistry and Program in Polymers and Soft Matter,
Massachusetts Institute of Technology

2016-2017
Firmenich Career Development Associate Professor (w/o Tenure),
Department of Chemistry and Program in Polymers and Soft Matter,
Massachusetts Institute of Technology

2015-2016
Firmenich Career Development Assistant Professor,
Department of Chemistry and Program in Polymers and Soft Matter,
Massachusetts Institute of Technology

2011-2015
Assistant Professor,
Department of Chemistry and Program in Polymers and Soft Matter,
Massachusetts Institute of Technology

2009-2011
Beckman Institute Postdoctoral Scholar with Professors Robert H. Grubbs and David A. Tirrell, California Institute of Technology

2005-2007
Graduate research with Professor M.G. Finn,
The Scripps Research Institute, summers

2004-2009
Graduate research with Professors Nicholas J. Turro and Jeffrey T. Koberstein,
Columbia University

2001-2004
Undergraduate research with Karen L. Wooley,
Washington University in St. Louis

Education:

2009
Columbia University,
Ph. D., Chemistry

2004
Washington University in St. Louis, B.S.,
Biomedical Engineering and Chemistry

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Latest News:

19 August 2017: New postdoc Jessica Lamb arrives from Cornell!

10 August 2017: Welcome to new postdoc Eileen Burke who joins us from UW-Madison!

12 July 2017: Hung's paper on BASP-ORCAs, the first metal-free paramagentic agents with sufficient stability and relaxivity for MRI imaging in vivo up to 20 h following injection, is published in ACS Central Science. This work shows that organic radical MRI contrast agents can potentially compete with metal-based agents, the latter of which suffer from serious toxicity concerns. Congrats Hung!


Click here to read the paper.

Click here to read the MIT News story.

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12 July 2017: Michelle's paper introducing "Block Co-PolyMOFs" is published in Polymer Chemistry. Block Co-PolyMOFs are novel polymer-polyMOF hybrid materials derived from block copolymers that feature a polyMOF forming oligomer block and an amorphous polymer block. Michelle demonstrates that these block copolymers can bind to zinc ions and yield easily processable and highly stable crystalline polyMOFs embedded within amorphous polymer networks. Congrats Michelle!


Click here to read the paper.
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26 June 2017: Nate Oldenhuis receives an NIH F32 Postdoctoral Fellowship. Congrats Nate!

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21 June 2017: Welcome to new postdoc Dr. Yoshiki Shibuya!

11 June 2017: Welcome to the rest of our summer visiting students: Julian Grundler, Sarah Al Abdullatif, and Leticia Costa!

8 June 2017: Congratulations to Dr. Ken Kawamoto, the group's third PhD!!!

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29 May 2017: Welcome to the first of our summer visitors! Prof. Ellane Park joins us from Rollins College and Manuel Hartweg is a visiting graduate student from Queen Mary University of London.


24 May 2017: Michelle MacLeod was honored at the 2017 celebration of Graduate Women of Excellence. Congrats Michelle!

Click here for more info.
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18 May 2017: Welcome to new postdoc Dr. Nate Oldenhuis!

10 May 2017: Congrats to Dr. Ken Kawamoto for successfully defending his thesis! The 3rd group PhD!!

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24 April 2017: Yuwei's paper on using semi-batch monomer addition to control loops in polymer networks and thereby enhance or tune their mechanical properties is published online in PNAS. Congrats Yuwei!


Click here to read the paper.

Click here to read the MIT News story.

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19 April 2017: Ken Kawamoto presented his research on branched-bottlebrush polymer assembly in the Excellence in Graduate Polymer Research Symposium at the ACS National Meeting in San Francisco. Congrats Ken!

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11 April 2017: Jiwon Park awarded a Fulbright Scholarship! Congrats Jiwon!

10 April 2017: New post-doc Peyton Shieh joins the group! Welcome Peyton!

3 April 2017: We are happy to be part of a multi-PI team sponsored by the Toyota Research Institute that will design novel polymers for energy storage applications. Click here for the MIT News announcement.

7 March 2017: Collaborative paper with the Olsen group on odd-even effects of junction functionality on the primary loop fraction in end-linked polymer networks appears online in Macromolecules. Thanks to Brad and Rui for the great work!

1 March 2016: The group welcomes two new group members: Simi Bright (MIT UROP) and Dr. Junpeng Wang (post-doc)! See group page for more details.

10 February 2017: Jeremiah joins the editorial advisory boards of Macromolecules and ACS Macro Letters.

6 February 2017: Collaborative paper with the Balazs group on photoregeneration of severed gels published online in Soft Matter. Thanks to Anna and her group for the great collaboration!

3 February 2017: Matthew Golder receives an NIH F32 Postdoctoral Fellowship. Congrats Matt!

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2 February 2017: Mao's paper on a thermally responsive and recyclable gel photoredox catalyst for multiple-stimuli- and logic-gated controlled radical polymerization appears online in Journal of the American Chemical Society. Congrats Mao!

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23 January 2017: Jiwon Park is highlighted by MIT News. Click on the image below to read the story. Congrats Jiwon for your amazing accomplishments!

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13 January 2017: Mao and Yuwei's paper on Living Additive Manufacturing via Photo-Redox Catalyzed Growth (PRCG) of polymer networks published online in ACS Central Science. Click on the image below to view the open access paper, and read the MIT News story here. Congrats Mao and Yuwei and the whole team!

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5 December 2016: Yufeng's paper on Star PolyMOCs published online in Angewandte Chemie. Click on the image below to view the paper. Congrats Yufeng!

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4 December 2016: Jeremiah is promoted to Associate Professor with Tenure!

28 November 2016: The group welcomes first year graduate student Peter Qin!

20 October 2016: Welcome to new postdoc Dr. Nolan Gallagher and UROP Kathleen Chen!

10 October 2016: Congratulations to Dr. Jenny Liu, the group's second PhD!!!

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3 October 2016: Former group member Dr. Mao Chen begins his new position as Assistant Professor at Fudan University. Congrats Mao!


PolyMao Group Webpage


15 September 2016: Mingjiang, Rui, and Ken's paper on quantifying how topological defects impact the elasticity of polymer networks published online in Science. Congrats to the team! Click on the image or links below to see the paper, read the MIT News highlight, and watch our video on loops in polymer networks!


Read the paper here.

See MIT News story here.
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14 September 2016: Jonathan's paper with Peter Bruno and Mike Hemann (MIT Dept. of Biology) on using RNAi signatures to investigate the mechanism of action of 3-drug conjugated BASP nanoparticles built from platinum crosslinkers published online in JACS. Congrats to Jonathan and the whole BASP team! Click on the image below to read the paper.


See MIT News story here.

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8 September 2016: Alex and Julia's paper on the role of polymer chain length and branching in the structure and properties of polyMOCs published online in Macromolecules. Congrats!

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1 September 2016: Ken and Mingjiang's paper on the self-assembly of "A-branch-B" diblock bottlebrush copolymers published oline in JACS. Congrats Ken and Mingjiang!

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17 August 2016: Our work on structurally controlled polymers using Iterative Exponential Growth (IEG) highlighted in a wonderful feature article by Mark Peplow in Nature:


The Plastics Revolution: How Chemists are Pushing Polymers to New Limits.

16 August 2016: Yufeng's paper on "Block Co-PolyMOCs" published in JACS. Congrats Yufeng!

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3 August 2016: Welcome to new postdocs Dr. Wenxu Zhang and Dr. Mingjun Huang, as well as visiting professors Xingui Li and Meirong Huang.


1 August 2016: Former group member Dr. Yufeng Wang begins his new position as Assistant Professor of Chemistry at The University of Hong Kong. Congrats Yufeng!


UHK faculty page: Prof. Yufeng Wang

21 July 2016: Dr. Matt Golder wins an IUPAC-SOLVAY International Award for Young Chemists for his PhD thesis work with Prof. Ramesh Jasti. Congrats Matt on this very prestigious award!


IUPAC Announcement Here.

21 July 2016: Yivan's paper on IEG synthesis and bulk self-assembly of uniform diblock copolymers published online in JACS. Congrats Yivan!

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15 July 2016: Former PhD student Dr. Alex Zhukhovitskiy wins a Life Sciences Research Foundation postdoctoral fellowship for his upcoming work with Prof. Dean Toste at UC Berkeley. Congrats Alex on this very prestigious fellowship, and best of luck at Berkeley!

5 July 2016: The group welcomes visiting students Yoshiki Shibuya, Wencong Wang, and Seth Freedman!

1 July 2016: Alex's paper on inserting persistent carbenes into Si-H bonds in molecules, nanoparticles, and planar surfaces appears online in JACS. Congrats Alex!

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1 July 2016: Former group member Dr. Mingjiang Zhong begins his new position as Assistant Professor of Chemical Engineering at Yale University. Congrats Mingjiang!


Yale faculty page: Prof. Mingjiang Zhong

1 July 2016: Former group member Dr. Jonathan C. Barnes begins his new position as Assistant Professor of Chemistry at Washington University in St. Louis. Congrats Jonathan!


Barnes Group Website

14 June 2016: The group welcomes new post-doc Dr. Farrukh Vohidov! See the group page for more info.

10 June 2016: Congratulations to Dr. Alex Zhukhovitskiy, the group's first PhD!!!

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10 June 2016: The group welcomes visiting students Yasmeen AlFaraj and Yongsheng Gao! See the group page for more info.

7 May 2016: Paper with Rui Wang, Brad Olsen, and Alfredo Alexander-Katz on "Universal Cyclic Topology in Polymer Networks" appears in Physical Review Letters. Congrats to all and especially Rui! In this work, Rui was able to show that all loop defects in polymer networks are kinetically linked, such that if we can measure one (which we can) we can measure them all. Truly outstanding!

Click Here to Read the Paper.

1 April 2016: Collaborative paper with Anna Balazs using simulations to study phase separation in our photo-growth gels published in Polymer Chemistry!

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15 March 2016: Mao and Mingjiang's review on light-controlled radical polymerization appears online in Chemical Reviews!

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25 February 2016: Jonathan Barnes accepts a position as Assistant Professor in the Department of Chemistry at Washington University in St. Louis! Congrats! See Announcement Here.

19 February 2016: Mao and Mingjiang's Chemical Reviews article on Photo-controlled Living Radical Polymerization is accepted for publication! Details to follow. Congrats!

16 February 2016: The group welcomes new visiting student Alan Enciso and new UROP Cathy Zhang!

14 February 2016: Welcome to two new group members: Shidong (Will) Deng (visting undergraduate student from Tianjin University) and Prof. Jun Lin (visiting professor from Yunnan University).

13 January 2016: IEG+ paper highlighted in Synfacts!


See Highlight Here.

4 January 2016: Jeremiah receives the 2016 Young Talent Award from the organizers of the 1st International Conference of Molecular Engineering of Polymers (MEP-1). This exciting conference will be held in October 2016 in Shanghai. Thank you to the MEP-1 organizers and, in particular, Prof. Jiandong Ding.

24 December 2015: The Johnson Group's work is highlighted in the Boston Globe's STAT News. See the article here: "Three People to Watch in Kendall Square in 2016."

9 December 2015: Yufeng's baby boy Charles Hanyou Wang is born! Congrats Yufeng!

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1 December 2015: Ken and Mingjiang's paper on counting primary loops in tetrafunctional and mixed-junction networks prepared using click chemistry appears online in Macromolecules!

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16 November 2015: Alex and Mingjiang's paper on high branch functionality and loop rich PolyMOCs appears online in Nature Chemistry! Congrats!


MIT News story here.

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12 November 2015: The group welcomes back Julia Zhao! Once a visiting undergraduate student, now a PhD student. Welcome Julia!

5 October 2015: New post-doc Matt Golder joins the group! See group page for more information. Welcome Matt!

1 October 2015: Alex and Mingjiang's paper on highly branched and loop rich "Polymer Metal-Organic-Cage" (PolyMOC) gels is accepted for publication in Nature Chemistry! Details to follow. Congrats Alex and Mingjiang, and thanks to all of our collaborators on this work!

22 September 2015: Alex and Michelle's review article on carbenes in surface chemistry is published online in Chemical Reviews! A lot of very hard work went into this fantastic paper. Congrats!

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14 September 2015: IEG+ paper highlighted by Chemistry World!


See Story Here.

10 September 2015: Jeremiah has joined the editorial board of Polymer Chemistry!


More Information Here.

7 September 2015: Jonathan's paper on the synthesis of stereo- and sequence-controlled polymers by iterative exponential growth plus side-chain functionalization (IEG+) appears online in Nature Chemistry! Congrats Jonathan!

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19 August 2015: Flow-IEG paper highlighted by C&EN@ACS Boston 2015 and C&E News, Science and Technology, News of the Week!


See Story Here.

12 August 2015: The joint Johnson/Van Humbeck group volleyball team (Jeremiah was a Van Humbeck Whale) takes 3rd place in the Chemistry Department summer beach volleyball league!

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12 August 2015: Frank's paper on continuous-flow iterative exponential growth (flow-IEG) of unimolecular polymers appears in PNAS! Congrats Frank!

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17 June 2015: Michelle's paper on PEGylated-NHC functionalized gold nanoparticles appears in JACS! Congrats Michelle!

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30 April 2015: Mao and Michelles's paper on using 10-phenylphenothiazine as an organic photo-redox catalyst to mediate visible-light controlled radical polymerization from a trithiocarbonate appears online in ACS Macro Letters! Congrats!

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20 April 2015: Jonathan wins an IUPAC-SOLVAY International Award for Young Chemists for his PhD thesis work with Prof. Fraser Stoddart. Congrats Jonathan on this very prestigious award!


IUPAC Announcement Here.

9 April 2015: Ken's paper on combining tetrazine-metal coordination and Diels-Alder reactions for the synthesis of functional supramolecular gels appears online in ACS Macro Letters! Congrats Ken!

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2 April 2015: The group welcomes new post-doc Dr. Qixian Chen!

1 April 2015: Congrats to Hung for receiving an NSF Graduate Research Fellowship!

17 March 2015: Mao's paper on improving photo-controlled radical polymerization from trithiocarbonates using continuous flow techniques appears online in Chemical Communications Congrats Mao!

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4 March 2015: NHC cycloelimination paper selected for the cover of Chem. Euro. J.!


See Cover Profile Here.

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20 February 2015: Alex and Julie's paper on cycloelimination of NHCs appears online in Chem. Euro. J. Congrats!

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13 February 2015: Michelle receives a WIC Travel Award for support of her trip to the ACS National Meeting in Denver, CO. Congrats Michelle!

15 January 2015: The group welcomes a new UROP: Katherine Young!

18 November 2014: Molly and Jessica's paper on nitroxide-based branched bottlebrush polymers for dual-modality imaging in vivo appears in Nature Communications. Congrats! Thanks to the Rajca group at University of Nebraska and the Hammond group here at MIT for the fruitful collaboration.


MIT News story here.

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13 November 2014: The group welcomes four new PhD students: Yuwei Gu, Gihan Hewage, Yivan Jiang, and Hung Nguyen!

15 October 2014: The group welcomes two new post-docs: Dr. Mao Chen and Dr. Yufeng Wang!

3 October 2014: The group successfully escapes from a room with a zombie.

1 October 2014: Several new faces in the lab! Welcome Dr. Mao Chen, Julie Geng, and Vivian Tian!

29 August 2014: Alex is recognized with a prestigious American Chemical Society Division of Organic Chemistry Graduate Fellowship. Congrats Alex!

12 August 2014: The lab receives a MIT-DuPont Alliance grant for the synthesis of "perfect polymers". Thank you DuPont!

8 August 2014: Angela and Yan's paper on the synthesis of pH sensitive BASP nanoparticles is accepted for publication in ACS Macro Letters. Congrats!

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20 June 2014: The group welcomes visiting CMSE intern Julia Zhao!

11 June 2014: The group welcomes visiting MSRP student Leila Terrab!

10 June 2014: The lab receives NIH support for the development of organic radical MRI contrast agents. Thank you NIH.

9 June 2014: The lab receives MIT Lincoln Labs ACC support for the development of new materials for photo-controlled 3D printing. Thank you ACC.

29 May 2014: Huaxing, Eva, and Jenny's article on the application of crossover experiments to the analysis of molecular defects in polymer networks appears online in JACS!

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27 May 2014: Alex receives a prestigious 2014 Intel PhD Fellowship! Congrats Alex!!

7 May 2014: Jeremiah receives a 2014 DuPont Young Professor Award! Thank you DuPont!


Official Press Release Here.

18 April 2014: Jeremiah receives a 2014 NSF CAREER Award! Thank you NSF!

10 April 2014: Yan and Jenny's work on the synthesis of multi-drug-loaded nanoparticles for ratiometric triplex combination cancer therapy appears in JACS. Congrats Yan and Jenny!


C&E News story here.
JACS Spotlight story here.
MIT News story here.

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7 April 2014: The group welcomes new visiting student Kojiro Fujimura from Kyoto University!

20 March 2014: Jeremiah receives a 2014 3M Non-Tenured Faculty Award. Thank you 3M!


MIT News story here.

18 March 2014: The group receives a MIT Energy Initiative (MITEI) Seed Fund Grant for the development of hybrid metal-organic polymeric materials with Prof. Niels Holten-Anderson's group in MIT's Department of Materials Science and Engineering. Thank you MITEI.


MIT News story here.

20 February 2014: Jonathan receives 2014 Life Sciences Research Foundation (LSRF) Postdoctoral Fellowship! Congrats Jonathan!

18 February 2014: Jeremiah receives 2014 Sloan Research Fellowship! Also congrats to colleagues Mircea Dinca, Bradley Olsen, and the rest of the MIT Sloan Fellows!


New York Times announcement here.
MIT News story here.

14 February 2014: The group welcomes new post-doctoral scholar Dr. Jonathan Barnes!

6 February 2014: The groups receives an Air Force Young Investigator Research Program (YIP) Grant to work on the synthesis and self-assembly of branched bottlebrush copolymers. Thank you AFOSR!

6 January 2014: The group welcomes visiting student Johanna Ertl!

1 January 2014: The group welcomes two new undergraduate researchers Chew and Katherine!

15 November 2013: The group welcomes new graduate student Deborah Ehrlich. Welcome Deborah!

15 October 2013: The group welcomes new post-doc Dr. Mingjiang Zhong. Welcome Mingjiang!

11 October 2013: Jenny and Angela's JoVE article titled "Particles Without a Box" is published online. Go see Jenny and Angela make a nice series of our PEG-BASPs HERE .

7 October 2013: Alan and Angela's paper that describes the synthesis of PS-PLA Miktoarm BASPs was accepted as part of a special issue of Macromolecular Rapid Communications focused on cutting-edge polymer synthesis. Congrats Alan and Angela!

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30 September 2013: Alan and Yan's paper that describes the "Brush-first and Click Method" for photo-triggered drug delivery appears online as part of a special issue of Photochemistry and Photobiology dedicated to the memory of Prof. Nick Turro.

15 September 2013: Jeremiah was selected as an ACS PMSE young investigator. He will present as part of the PMSE Young Investigator Symposium at the Spring 2014 National ACS meeting in Dallas, TX.

14 September 2013: The Johnson group has received a grant from the National Science Foundation (NSF) under the "Designing Materials to Revolutionize and Engineer Our Future" (DMREF) program. Our project will focus on the design, synthesis, and computational analysis of polymer networks for emerging applications. This project will continue our strong/ongoing collaboration with Prof. Bradley Olsen's group in Chemical Engineering at MIT. Thank you NSF!

23 August 2013: Alexandra's "tetrazine-norbornene Diels-Alder model networks" paper appears in Macromolcular Symposia as part of a special issue highlighting the 2012 Polymer Networks Group conference in Jackson Hole, WY. Congrats Alexandra!

Note that while our article was in press, Professor Kristi Anseth's group published a related paper on tetrazine-norbornene hydrogels for 3D cell culture. See Kristi's excellent paper here: link.

20 August 2013: Congrats to Ken, Molly, and Angela for winning Department of Chemistry Awards for Outstanding Teaching!

20 August 2013: The Johnson and Surendranath Labs enjoyed an afternoon of intense laser tag action:

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17 June 2013: The group welcomes two visiting students: Marco Messina from Mark Olsen's lab at Texas A&M and Tianyuan (Ryan) Liu from Roxbury Community College. It's great to have you both!

3 June 2013: Alex's JACS paper receives media attention:

Chemical and Engineering News: "Carbene For Gold Surfaces"

MIT News: "A New Kind of Chemical Glue"

30 May 2013: Carbene surfaces featured as the MIT homepage spotlight!

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13 May 2013: Alex's "addressable carbenes for gold surfaces" JACS paper appears online. Congrats Alex!

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3 May 2013: Discussion of our "Network Disassembly Spectrometry" (NDS) method in PNAS:

"Quantifying primary loops in polymer gels by linear viscoelasticity" - F. J. Stadler


"Reply to Stadler: combining network disassembly spectrometry with rheology/spectroscopy" - B. D. Olsen and J. A. Johnson


23 April 2013: "Photo-growth" paper highlighted in Nature Chemistry:

"Polymer Chemistry: Rooftop Reactions"


27 February 2013: Huaxing's photo-growth paper highlighted by various media outlets:

Materials Research Society Materials360

Chemistry Views

SpectroscopyNOW

2 February 2013: The Johnson Group on their first somewhat annual ski trip:

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18 January 2013: Huaxing's "photo-controlled gel growth" Angewandte Chemie paper appears online. Congrats Huaxing!

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16 January 2013 : Two bits of great news:

(1) Huaxing's "photo-controlled gel growth" paper chosen as a "Hot Paper" by the editors of Angewandte Chemie: Angewandte "Hot Papers"

(2) Huaxing's PNAS paper on counting loops highlighted in Nature News and Views: Nature News and Views

27 November 2012: "Brush-first" paper highlighted in SYNFACTS .

15 November 2012: The group welcomes four 1st-year graduate students: Angela, Ken, Michelle, and Molly!

9 November 2012: Counting loops by "S/L Method" paper appears in PNAS (click on the image below to access the paper). Congrats Huaxing, Jen, and Alexandra!


"Counting Loops" highlighted in MIT news!


"Counting Loops" highlighted in Nature!

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4 October 2012: "Pseudo-alternating polymers" paper appears in Macromolecules. Congrats Alan and Alex!

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6 September 2012: "Brush-first" paper appears in JACS. Congrats Jenny, Alan and Alex!

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19 July 2012: The Johnson Group beach volleyball team:

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1 June 2012: We welcome Eva-Maria Schoen to the group! Eva-Maria is visitng from Professor David Diaz Diaz's group. We are thrilled to have her here for the summer!

20 May 2012: The Johnson group celebrates their 6-month anniversary with an exciting day of food, drink, and laser tag.

8 May 2012: Johnson group journal blog launched. Click HERE to see what the group is reading.

30 March 2012: Alan O. Burts receives an NSF graduate fellowship. Alex receive's a Morse Travel Grant for the Fall 2012 ACS Meeting in Philadelphia. Congrats Alan and Alex!

17, 24 February 2012: The Johnson group celebrates the first annual Flory Day(s)! Each student gave a presentation on fundamental aspects of synthetic polymer chemistry. Topics included chain and step-growth polymerization, gelation and network formation, controlled polymerization processes, and polymer architectures. Fun was had by all.

11 November 2011: Welcome first year graduate students Alexandra, Jenny, Alan, Alex, and Jessica to the group! Also, welcome Huaxing Zhou (post-doc) and Elisha Yadgaran (UROP)! First group meeting today.

31 October 2011: Paper that describes EPR studies of nitroxide-labeled brush polymers appears in JACS.

8 September 2011: Classes begin! For info on Jeremiah's course, 5.53 Molecular Structure and Reactivity, go here .

15 August 2011: We welcome Jen Woo to the group!

11 July 2011: The Johnson Group begins! We welcome first year MIT graduate students Melissa Donaldson and Alan Burts!

9 June 2011: Thanks to Tim Swager for inviting Jeremiah to the NSF-sponsored "Future Faculty Workshop: Diverse Leaders of Tomorrow," which was held June 19-21 at the MIT Endicott House. For more information on this year's workshop click here .

1 July 2011: The Johnson group begins!

We seek to cultivate a vibrant and intellectually engaging atmosphere: an “incubator for discovery.”

Research:

The solutions to many of mankind’s greatest problems: prevention and treatment of disease, development of alternative energy sources, preservation of natural resources, etc., will rely on the interdisciplinary application of synthetic chemistry. The Johnson laboratory seeks creative, macromolecular solutions to problems at the interface of chemistry, medicine, biology, and materials science. Materials synthesis is approached in an analogous manner to natural-products synthesis; an interesting target structure is chosen and a synthetic scheme is designed to access that structure as efficiently as possible. The targets are designed de novo from careful consideration of the specific needs of a given application and with a particular emphasis on creative architectural design and function. The tools of traditional organic and organometallic synthesis, synthetic polymer chemistry, photochemistry, surface science, and biopolymer engineering are combined to realize the designs.

Just as natural-products chemists must often invent new reaction methodologies to access complex structures and their corresponding derivatives, the Johnson lab will seek to develop new methodologies for the construction and modification of complex material libraries. Iterative library synthesis, function-based screening, and design optimization will ultimately yield basic knowledge, such as structure-function relationships for materials in specific applications, and new materials-based technologies that outperform current alternatives. Some examples of target material platforms and their associated applications are: (1) novel, nanoscopic branched-arm star polymer architectures for in vivo drug/gene delivery and supported catalysis, (2) hybrid synthetic-natural hydrogels for correlation of the effects of network microstructure on cell response, and (3) new types of semiconducting organometallic polymers and polymer films for sensing, supported catalysis, and energy conversion. Taken as a whole, our research focuses on molecular design in three primary areas: nano-scale materials synthesis, macro-scale materials synthesis, and development of new chemical methods for modifying interfaces between bulk and nanoscale objects (surface chemistry).

Current Members:

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Sarah Al Abdullatif
Visting Student

Sarah Al Abdullatif is an international student from Saudi Arabia, currently pursuing an undergraduate degree at UC Berkeley. Sarah is a rising senior studying Chemistry. At Berkeley, she has been working under Prof. Evan Miller on the synthesis of red-shifted fluorescent sensors for reporting voltage differences across neuronal activities. This summer she is working with the Johnson lab on developing polymer electrolytes for lithium batteries. Her academic interests are organic synthesis and materials chemistry. Outside of chemistry, Sarah is an active member and officer of the Cal Gymnastics Club, and enjoys tennis, writing, and sci-fi.

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Dr. Eileen Burke
Postdoctoral Scientist

Eileen grew up in central Wisconsin, then went west to Bozeman, MT in pursuit of skiing and chemistry. She graduated from Montana State University in 2012 after an REU at UMN-Twin Cities with Prof. William Tolman studying catalyst design for PLA synthesis. From there she returned to Wisconsin to study at UW-Madison under Prof. Jennifer Schomaker. There she worked to develop allene functionalization methodologies to approach both densely functionalized motifs and strained heterocycles for use in SPAAC applications. Eileen joined the Johnson group in August 2017 to study flow oxidations and polymerizations.

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Simi Bright
UROP

I am from Lagos, Nigeria. I am currently a sophomore majoring in chemical engineering and chemistry. I have previously worked in the Kulik Lab on optimizing nanoparticle structures and last summer I did research on stem cells for tissue engineering. I am excited to work on nanoparticles for drug delivery in the Johnson lab. In my free time I enjoy playing soccer, watching Netflix and mixing music as an amateur dj.

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Kathleen Chen
UROP

I grew up in the San Francisco Bay Area, in the city of Fremont, CA. I am currently a senior majoring in chemistry at Wellesley College. Previously, I worked in Prof. Nolan Flynn's lab at Wellesley, exploring the synthesis of novel nanomaterials. This past summer, I worked as an intern under the mentorship of Dr. Ron Zuckermann at Lawrence Berkeley National Lab, using surface-functionalized peptoid nanosheets as scaffolds to synthesize novel optical sensors. While there, I developed an interest in materials chemistry and now am very excited to explore the field as a part of the Johnson group. In my free time, I enjoy listening to podcasts, running, and watching Netflix.

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Leticia Costa
Visting Student

I’m an international student from Rio de Janeiro, Brazil. I’m a rising junior majoring in Chemistry at Wesleyan University, where I work on computational modeling and molecule system comprehension research. The aim of my project is to gain an understanding of the transduction of ligand binding energy into allosteric signal transmission for proteins. This summer, as part of the MIT Summer Research Program, I will be working with Peyton Shieh in the Johnson Group. I aspire to obtain a PhD and return to Brazil in order to increase the scientific development of my country. Aside from academics, I enjoy traveling, watching tv series, reading novels in Portuguese, and spending time with my friends.

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Deborah Ehrlich
Graduate Student

I am a local girl who grew up ~20 miles away in Natick, MA. I received a B.S. in chemistry from the University of Massachusetts, Amherst. During my undergraduate education, I worked in the Coughlin group synthesizing photo-cleavable polymers and with Prof. Ramanathan Nagarajan modeling peptide adsorption to lipid bilayers. I am very excited to continue studying polymer chemistry in the Johnson group! In my free time, I enjoy making a mess in the kitchen, playing the oboe, and reading.

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Dr. Nolan Gallagher
Postdoctoral Scientist

Nolan was born and raised in Omaha, Nebraska - the beef capital of the Midwest. After studying chemical engineering as an undergraduate, he joined Dr. Andrzej Rajca’s lab at the University of Nebraska – Lincoln, where he worked on the design and synthesis of high spin organic radical assemblies. Currently, his research interests include radical polymers for applications in improved organic contrast agents/drug delivery as well as materials science. When not in lab, he enjoys traveling, hiking, spelunking, and even eating fried chicken in bed

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Dr. Matthew Golder
NIH Postdoctoral Fellow

Matt was raised in America’s largest town, Framingham, MA, before heading to the University of Rochester to earn his BS in Chemistry. While in upstate New York, he conducted research in Prof. Patrick Holland’s lab, was a member of the swim team, and became proficient in hiking across a snowy campus. He was also a DAAD-RISE Scholar with Prof. Stefan Hecht in Berlin, Germany where he first became interested in organic materials. Matt moved back to Massachusetts in 2010 to begin graduate school at Boston University with Prof. Ramesh Jasti. Later, he moved with the group to the University of Oregon where he obtained his PhD in 2015. During his doctoral studies, Matt’s research was focused on the total synthesis and characterization of strained aromatic macrocycles (carbon nanotube fragments). He joined Prof. Jeremiah Johnson’s group in October 2015 to apply his passion for making molecules and materials towards broad problems in polymer chemistry. In his free time, Matt enjoys shooting photos, cooking, exploring the gym, and travelling.

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Julian Grundler
Visting Student

Originally from a small German city minutes away from the Swiss border, I moved to Orlando, FL to pursue a bachelor´s degree in Chemistry at Rollins College where I am currently a rising senior and part of the soccer team. Research on photoactive functionalized gold nanoparticles in Prof. Ellane Park´s lab throughout my Sophomore and Junior year sparked my interest in designing nanocarriers for a more selective drug delivery. Thus, I am very excited to join the Johnson group this summer and learn more about polymeric nanoparticles. In my free time, I enjoy road cycling, hiking and travelling

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Yuwei Gu
Graduate Student

I was raised in Ningbo, a beautiful coastal city in China. I received my B.S. in Chemical Biology from Tsinghua University (Beijing, China). In my undergraduate education, I worked in Prof. Huaping Xu’s lab synthesizing tellurium-containing polymers as drug-delivery vehicles (Believe it or not, they are actually quite bio-compatible!). In 2013, I took a summer research position in Prof. Steve Granick’s lab at University of Illinois at Urbana–Champaign, where I was trained as a polymer physicist and finally fell in love with polymer physics. In the Johnson group, I’m excited to explore uncharted territory at the interface between hydrogel chemistry, gelation physics, and even cell migration. Let’s wish me good luck.

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Manuel Hartweg
Visiting Student

Manuel grew up in Germany and received his BSc from Karlsruhe Insistute of Technology working on Applied and Green Chemistry in the Group of Prof. M. Meier. For his MSc he moved to Philipps University in Marburg, were he worked on catalytic approaches for the CO2 expoxide copolymerisations with Prof. J. Sundermeyer. While in Marburg, he conducted research at Florida State University on the microflow synthesis of NHC-catalysts. Early 2015, Manuel then joined the Group of Dr. C. R. Becer at Queen Mary, University of London for his PhD, were he is currently working on the synthesis of novel monomers, their resulting polymers as well as macromolecular systems for various targeted applications.

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Dr. Mingjun Huang
Postdoctoral Scientist

I grew up at Jiangxi Province in middle part of China. After receiving my B.S. degree majoring in Chemistry in Peking University, I continued to pursue the Ph.D degree in the Department of Polymer Science at the University of Akron (UA) from 2010 to 2015, under the supervision of Dr. Stephen Z.D. Cheng. My primary research interests in UA focused on highly efficient synthesis of hybrid giant molecules combing controlled/living polymerization and “click" reactions and self-assembly behavior studies of hierarchical mesophases at nanoscale. From June 2016, I joined the groups of Profs. Yang Shao-Horn and Jeremiah Johnson as a joint postdoctoral fellow, where I will be able to explore interesting polymer chemistry and electrochemical energy materials studies.

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Yivan Jiang
Graduate Student

I grew up in the town of Stow, MA famous for its apple farms. I got my BA in Biochemistry from Columbia University where I learned a great deal in the lab of Luis Campos. There, I developed an avid interest in polymer chemistry and its various applications in photovoltaics, energy storage, and gene transfection. Now, I'm excited to be a graduate student back in my home state of Massachusetts. In the Johnson group, I aim to further my understanding of macromolecular research through studying polymerization techniques and systems for drug delivery.

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Ken Kawamoto
Graduate Student

Ken studied chemistry and biology at Cornell University and graduated with a BA in May 2012. Although his undergraduate research was in small molecule synthesis, he is interested in polymer chemistry and counting primary loops. He is also an amateur powerlifter, likes to slackline, and enjoys going to BSO performances.

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Julie Kim
Graduate Student

Raised in McLean, Virginia, Julie is currently a sophomore at MIT majoring in Biological Engineering. As a pre-med student, she is interested in research with medical implications. She first UROPed at the Koch Institute in Dr. Peter Ghoroghchian’s lab, synthesizing upconverting rare-earth metal doped nanoparticles used for imaging tumors. Now as part of the Johnson group, she is excited to explore nanoparticles from a chemistry perspective. Outside of academics, Julie enjoys watching football, being involved in MIT Asian Christian Fellowship, and shooting for MIT’s Sport Pistol Team.

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Dr. Jessica Lamb
Postdoctoral Scientist

Jessica grew up in Fargo, North Dakota and received her BS in Chemistry from the University of North Dakota in 2012. During her undergraduate career she worked on the solvent-free synthesis of organometallic compounds (cyclopalladated complexes) under Prof. Irina Smoliakova and conducted summer research in the Coatings and Polymeric Materials Department of North Dakota State University under Prof. Victoria Johnston-Gelling. She then moved to Cornell University for her graduate studies under Prof. Geoffrey Coates. There she worked on catalyst development, methodology, and mechanistic investigations of selective epoxide transformations using bimetallic catalysts, culminating in her PhD in 2017. She joined Prof. Jeremiah Johnson's group in August 2017 where she will study photo-mediated polymerizations and complex polymer architectures. Outside of lab she enjoys swing and ballroom dancing, crafts, reading, and photography.

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Michelle MacLeod
Graduate Student

I was raised in picturesque Ithaca, NY where I received my B.A. in chemistry and economics from Cornell University. During my undergraduate research with Francis DiSalvo, I became interested in materials science and inorganic chemistry. As a member of the Johnson group, I am excited to apply and expand upon my interests at the interface of organometallic and polymer chemistry. Beyond the lab, I enjoy cooking and exploring the great outdoors, even a bog on occasion.

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Hung Nguyen
Graduate Student, NSF Fellow

Originally from Vietnam, I came to the States in 2009 for my undergraduate study. I attended Northern Virginia Community College, and then transferred to the University of North Carolina at Chapel Hill to finish my B.S. in Chemistry. During my undergraduate study, I worked on developing a radiopaque iodine-containing bone cement in Dr. Valerie Ashby’s lab (UNC-CH) and multi-stimuli responsive nanocapsule systems under Prof. Katharina Landfester (MPI-P), both of which clearly shaped my interest in polymer design and its vast potential in the biomedical field. Upon graduation, I worked on impurity characterization and API release profiling in oncology drugs at GSK. Joining the Johnson group, I will be working on developing ROMP-based BASP nanoparticles for applications in biomedicine, including imaging and drug delivery.

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Dr. Nate Oldenhuis
NIH Postdoctoral Fellow

Nate was raised in the cultural hub that is Omaha, Nebraska. He obtained his bachelors degree in chemistry from the University of Iowa in 2012. During his undergraduate career, Nate worked with Prof. Hien Nguyen at Iowa, and spent his summers working with Prof. Steve Buchwald at M.I.T. During the completion of his Ph.D. at the University of California, Irvine, Nate worked as joint student with Prof. Zhibin Guan and Prof. Vy Dong. During his time there, he worked on creating organic materials using organometallic catalysis, drug delivery polymers, and making mechanical gradients. While in the Johnson lab, Nate plans to continue learning about polymers. In his free time Nate enjoys the outdoors, cooking, climbing, swimming in mostly blue water, and the color green.

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Prof. Ellane Park
Visiting Professor

Ellane received her B.A. in Chemistry from Wellesley College in 2006 and her Ph.D. in Materials Chemistry from Columbia University in 2011. She is currently as assistant professor at Rollins College (Winter Hill, FL) where her group is interested in utilizing analytical technique and photochemistry to explore the development of bioselevtive gold nanocomposites towards applications in cancer therapy.

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Jiwon Park
UROP

I was born in Seoul, South Korea, but grew up in the plains of Fort Wayne, Indiana. I am now a junior majoring in Chemistry and interested in the interface of medicine, research, and finance. Before coming to MIT, I was a summer intern in the lab of Prof. Helen Blau at Stanford Medical School and Dr. Vincent Manganiello at the National Institutes of Health. During my first two years at MIT, I worked in the lab of Prof. David Sabatini at the Whitehead Institute, characterizing a transmembrane protein important for amino acid sensing in a metabolic pathway. After taking a class on inorganic chemistry, I became fascinated by polymers and material synthesis. I am excited to be a part of the Johnson group to do research in the field of polymer science. Outside of lab, I enjoy horseback riding, playing tennis, golfing, and performing at piano competitions.

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Peter Qin
Graduate Student

I was born in China and received my BS in Chemical Biology from Tsinghua University in Beijing. As an undergrad I joined Prof. Xi Zhang's lab to work on superamolecular polymers based on cucurbiturils, spent a summer in Prof. Jeffrey Moore's lab in UIUC synthesizing pheyleneacetylene macrocycles, and built model airplanes that flew (and crashed). I am excited to join the Johnson group to work on IEG polymers. Outside of lab, I like travelling, taking photos, and fixing all kinds of stuff.

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Dr. Peyton Shieh
Postdoctoral Scientist

Peyton grew up in Michigan, where he developed a love for autumn leaves and warm apple cider. He then studied chemistry at Harvard University, where he worked on the total synthesis of phorbol under the guidance of Professor David Evans. For his Ph.D., Peyton worked with Professor Carolyn Bertozzi at UC Berkeley on the development of responsive small-molecule fluorescent probes for applications in chemical biology and point-of-care diagnostics. After graduating, Peyton spent a bit over a year at Illumina in San Diego working on the surface chemistry of next-generation flowcells for high-throughput sequencing. Peyton is excited to return to Boston and to dive right in to studying the precision synthesis of responsive materials and their applications in biotechnology and medicine. In his free time, Peyton enjoys trying out new recipes, strumming on his guitar, and travelling. In particular, he is excited to explore Boston and the rest of New England, something that he neglected to do during his undergraduate years.

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Dr. Yoshiki Shibuya
Postdoctoral Scientist

Yoshiki was born and mainly raised in Tokyo, Japan, where the Olympic Games will be held in 2020. He graduated from the University of Tokyo with B.S., M.S., and Ph.D. degrees under the guidance of Prof. Takuzo Aida. In his graduate studies, he focused on crystalline and liquid crystalline tweezers-like molecules that can respond to environmental stimuli. In 2016 when he was a Ph.D. candidate, he joined the Johnson Group as a visiting student and took part in the BASP project. After receiving his Ph.D. in 2017, he joined the Johnson Group again as a post-doc, and is currently participating in the Toyota Research Institute project focusing on polymer electrolytes towards Li-ion batteries.

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Dr. Farrukh Vohidov
Postdoctoral Scientist

I was raised in Dushanbe, the capital of mountainous Tajikistan. After getting involved in my high school chemistry club I became fascinated with chemistry and I was lucky to represent my country in a number of international chemistry Olympiads. I earned my BS in Chemistry from Fatih University in Istanbul, where I worked with Prof. Naz Agh-Atabay on synthesis of macrocyclic complexes of transition metals for antimicrobial applications. In fall of 2010 I began graduate school at Rice University, in Houston, Texas. Under the guidance of Prof. Zachary Ball I developed methods for catalytic protein modification, synthesized a class of luminogenic azide probes, and designed inhibitors of protein-protein interactions. I joined Prof. Jeremiah Johnson’s group in June 2016, where I am excited to have the opportunity to research novel polymer-based biomaterials and their application for drug delivery, biological imaging, and tissue engineering. Outside the lab I lead an active lifestyle, and I especially enjoy running and playing football. In my free time I like to work on my car and explore new places with my fiancée.

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Dr. Junpeng Wang
Postdoctoral Scientist

Junpeng was born in a small town near Xi'an, China, where the Terracotta Army is located. He received his BS in Chemistry from USTC in 2010 and came to the US for graduate studies. He worked on polymer mechanochemistry under the guidance of Steve Craig at Duke University, and received his PhD in Chemistry in 2015. After a year of postdoctoral research at University of Chicago, he joined the Johnson group as a postdoctoral scientist. While Junpeng misses the Chicago Loop, he is more excited and thankful about the opportunity of tackling problems associated with molecular loops in polymer networks.

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Cathy Zhang
UROP

I am from Salt Lake City, Utah and a current sophomore majoring in biochemistry at Wellesley College. I have previously worked at Moran Eye Center studying neurotropic keratopathy in the Ambati lab. I am excited to be part of the Johnson lab to begin work in polymer science. Outside of academics, I enjoy being active out in the mountains, teaching tennis and attending symphonies.

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Dr. Wenxu Zhang
Postdoctoral Scientist

I was born and raised in Hengyang, a small city in South China. In 2010, I traveled 20 hours by train to attend Zhejiang University, where I botained my bachelor's degree. After that, I moved to University of Massachusetts, Amherst to pursue my Ph.D. in the Department of Polymer Science and Engineering. Under the advisory of Prof. E. Bryan Coughlin, I synthesized ionic copolymers for anion transport materials using RAFT and ROMP, and also studied the self-assembly of high-chi block copolymers. Now I am super excited to have the oppurtunity to be a postdoctoral researcher in the Johnson group, working on novel polymers with high stability for energy applications. In my free time, I enjoy eating spicy food, watching soccer, and visiting museums as well as zoos. In addition, I like Bruce Wayne, Tony Stark, and Han Solo.

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Julia Zhao
Graduate Student, NSF Fellow

Originally from Kansas City, Missouri, Julia earned a B.S. in chemistry and minored in biochemistry and cell biology at Rice University. As an undergraduate, she explored several areas of materials research, including single molecule spectroscopy and viral engineering at Rice as well as polymeric gene delivery as an Amgen scholar at UW. Julia also spent a summer as a visiting MPC CMSE intern at MIT, where she studied molecular defects in polymer networks in the Johnson and Olsen groups. She enjoyed the experience so much that she returned to MIT and the Johnson group to specialize in polymer chemistry as a graduate student. Julia spends her free time drawing, making music, and watching movies.

Graduate Students

Postdoctoral Scientists

UROPs

Visiting Researchers

Former Members:

Jiyeon Woo

Visiting Student
2011

Eva-Maria Schoen

Visiting Student
Summer 2012

Alan Burts

M.S. 2013
Current: University of California, Irvine, Dept. of Chemistry

Jessica McCombs

M.S. 2013
Current: Dept. of Pharmaceutical Chemistry, Univ. of Utah

Marco Messina

Visiting Student; Summer 2013
Current: PhD Student at UCLA with Heather Maynard

Dr. Huaxing Zhou

PD (2011-2013)
Current: ExxonMobil

Johanna Ertl

Visiting Student
Spring 2014

Elisha Yadgaran

UROP (2011-2014)
Current: Quantitative Analysis at Everquote.com

Kojiro Fujimura

Visiting Student; Summer 2014
Current: Mitsui Chemicals

Leila Terrab

Visiting MSRP Student
Summer 2014

Julia Zhao

Visiting Student; Summer 2014
Current: PhD Student at MIT with Jeremiah Johnson

Angela Gao

M.S. 2014
Current: Finnegan IP Firm

Molly Sowers

M.S. 2014
Current: Quantitative Data Analyst at Cogo Labs

Julie Geng

Visiting High School Student (2014)
Undergraduate Student at Williams College

Erica Zhou

Visiting High School Student (2014)
Undergraduate Student at MIT

Dr. Longyan Liao

PD (2012-2014)
Current: DOW

Vivian Tian

UROP (2014-2015)
Current: Course 10 Major at MIT

Chew Chai

UROP (2014-2015)
Current: Doyle Group Course 10

Katherine Mizrahi

UROP (2014-2015)
Current: Alexander-Katz Group Course 3

Kevin Erazo

UROP (2014-2015)
Current: Stanford University Dept. of Chemistry PhD Program

Katherine Young

UROP (2015)

Prof. Jun Lin

Visiting Professor (2016)

Gihan Hewage

M.S. 2015
Current: Lux Research

Alan Enciso

Visiting Student (2016)

Shihong (Will) Deng

Visiting Student (2016)

Dr. Jonathan Barnes

PD (2014-2016)
Current: Assistant Professor, Washington University in St. Louis

Dr. Alex Zhukhovitskiy

PhD 2016
Current: PD, Toste Group, UC Berkeley

Dr. Mingjiang Zhong

PD (2013-2016)
Current: Assistant Professor, Yale University

Dr. Qixian Chen

PD (2015-2016)

Dr. Yufeng Wang

PD (2014-2016)
Current: Assistant Professor, University of Hong Kong

Wencong Wang

Visting Student (2016)
Current: Undergraduate, Tsinghua University

Yongsheng Gao

Visting Student (2016)
Current: Graduate Student, University College Dublin

Seth Freedman

Visting Student (2016)
Current: Student, Newton North High School

Yasmeen AlFaraj

Visiting Student (2016)
Current: Undergraduate, UC Berkeley

Dr. Mao Chen

PD (2014-2016)
Current: Assistant Professor, Fudan University

Yoshiki Shibuya

Visiting Student (2016)
Current: Postdoc, Johnson Group, MIT

Prof. Meirong Huang

Visiting Professor (2016)
Current: Professor, Tongji University

Prof. Xingui Li

Visiting Professor (2016)
Current: Professor, Tongji University

Dr. Jenny Liu

PhD 2016
Current: XTuit Pharmaceuticals, Waltham, MA

Cathy Zhang

UROP (2016 - 2017)
Current: Undergraduate (Wellesley College)

Dr. Ken Kawamoto

PhD 2017
Current: DOW Chemicals, Midland, MI

Manuel Hartweg

Visiting Student (2017)
Current: Graduate Student, Queen Mary University of London

Jiwon Park

UROP (2016 - 2017)
Current: Fulbright Scholar (Warsaw, Poland)

Sarah Al Abdullatif

Visiting Student (2017)
Current: Undergraduate (UC Berkeley)

Julian Grundler

Visiting Student (2017)
Current: Undergraduate (Rollins College)

Prof. Ellane Park

Visiting Professor (2017)
Current: Professor (Rollins College)

Leticia Costa

Visiting Student (2017)
Current: Undergraduate (Wesleyan University)

 

 

Publications:

Lab

“Block co-polyMOFs: assembly of polymer-polyMOF hybrids via iterative exponential growth and 'click' chemistry”
MacLeod, M. J.; Johnson, J. A.* Polym. Chem. 20178, 4488-4493.
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Lab

“Nitroxide-based macromolecular contrast agents with unprecedented transverse relaxivity and stability for magnetic resonance imaging of tumors”
Nguyen, H. V.-T.; Chen, Q.; Paletta, J. T.; Harvey, P.; Jiang, Y.; Zhang, H.; Boska, M. D.; Ottaviani, M. F.; Jasanoff, A.; Rajca, A.; Johnson, J. A.* ACS Cent. Sci. 20173, 800-811.

Selected Highlights:
"Metal-free MRI contrast agent could be safer for some patients" MIT News. 2017, July 12th.
"Building a better magnetic resonance imaging contrast agent using macromolecular architecture" ACS Cent. Sci. 2017, doi:10.1021/acscentsci.7b00308.
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Lab

“Semibatch monomer addition as a general method to tune and enhance the mechanics of polymer networks via loop-defect control”
Gu, Y.; Kawamoto, K.; Zhong, M.; Chen, M.; Hore, M. J.A.; Jordan, A. M.; Korley, L. T.J.; Olsen, B. D.; Johnson, J. A.* Proc. Natl. Acad. Sci. U.S.A. 2017114, 4875-4880.

Selected Highlights:
"New strategy produces stronger polymers" MIT News. 2017, April 24th.
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Lab

“Odd–even effect of junction functionality on the topology and elasticity of polymer networks”
Wang, R.; Johnson, J. A.; Olsen, B. D.* Macromolecules 201750, 2556-2564.
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Lab

“Photo-regeneration of severed gel with iniferter-mediated photo-growth”
Singh, A.; Kuksenok, O.; Johnson, J. A.; Balazs, A. C.* Soft Matter 201713, 1978-1897.
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Lab

“Logic-controlled radical polymerization with heat and light: multiple-stimuli switching of polymer chain growth via a recyclable, thermally responsive, gel photoredox catalyst”
Chen, M.; Deng, S.; Gu, Y.; Lin, J.; MacLeod, M. J.; Johnson, J. A.* J. Am. Chem. Soc. 2017139, 2257-2266.
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Lab

“Living additive manufacturing: transformation of parent gels into diversely functionalized daughter gels made possible by visible light photoredox catalysis”
Chen, M.†; Gu, Y.†; Singh, A.; Zhong, M.; Jordan, A. M.; Biswas, S.; Korley, L. T.J.; Balazs, A. C.; Johnson, J. A.* ACS Cent. Sci. 20173, 124-134.

Selected Highlights:
"Living additive manufacturing" ACS Cent. Sci. 2017, DOI: 10.1021/acscentsci.7b00025
"Technique enables adaptable 3-D printing" MIT News 2017, January 13th.
"New 'living additive manufacturing' technique enables fusion, chemical alteration of 3D printed materials" 3Ders.org 2017, January 13th.
"MIT chemists develop new technique that enables adaptable 3D printing" Azo Materials 2017, January 16th.
"3D printing technique lets you change an object's colour using light" Wired Magazine 2017, January 17th.
"MIT develops 3-D printing 'undo' option" The Christian Science Monitor 2017, January 18th.
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Lab

“Star polyMOCs with diverse structures, dynamics, and functions by three-component assembly”
Wang, Y.; Gu, Y.; Keeler, E. G.; Park, J.; Griffin, R. G.; Johnson, J. A.* Angew. Chem. Int. Ed. 201756, 188-192.
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.

Lab

“Quantifying the impact of molecular defects on polymer network elasticity”
Zhong, M.†; Wang, R.†; Kawamoto, K.†; Olsen, B. D.*; Johnson, J. A.* Science 2016, 353, 1264-1268.

Selected Highlights:
"New theory overcomes a longstanding polymer problem" MIT News 2016, September 15th.
"New theory overcomes a longstanding polymer problem" Chemeurope.com 2016, September 20th.
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“Alkene metathesis-based polymerizations”
Liu, J.; Johnson, J. A.* Science of Synthesis: N-Heterocyclic Carbenes in Catalytic Organic Synthesis 2016, 2, 99-126. (Book Chapter)
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Lab
“Using an RNAi signature assay to guide the design of three-drug conjugated nanoparticles with validated mechanisms, in vivo efficacy, and low toxicity”
Barnes, J. C.†; Bruno, P. M.†; Nguyen, H. V.-T.; Liao, L.; Liu, J.; Hemann, M. T.; Johnson, J. A.* J. Am. Chem. Soc. 2016, 138, 12494-12501.

Selected Highlights:
"High-capacity nanoparticle" MIT News 2016, September 14th.
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Lab
“Polymer structure dependent hierarchy in polyMOC gels”
Zhukhovitskiy, A. V.; Zhao, J.; Zhong, M.; Keeler, E. G.; Alt, E. A.; Teichen, P.; Griffin, R. G.; Hore, M. J. A.; Willard, A. P.; Johnson, J. A.* Macromolecules 2016, 49, 6896-6902.
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Lab
“Graft-through synthesis and assembly of janus bottlebrush polymers from A-branch-B diblock macromonomers”
Kawamoto, K.; Zhong, M.; Gadelrab, K. R.; Cheng, L.-C.; Ross, C. A.; Alexander-Katz, A.; Johnson, J. A.* J. Am. Chem. Soc. 2016, 138, 11501-11504.
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Lab
“Block co-polyMOCs by stepwise self-assembly”
Wang, Y.; Zhong, M.; Park, J. V.; Zhukhovitskiy, A. V.; Johnson, J. A.* J. Am. Chem. Soc. 2016, 138, 10708-10715.
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Lab
“Iterative exponential growth synthesis and assembly of uniform diblock copolymers”
Jiang, Y.; Golder, M. R.; Nguyen, H. V.-T.; Wang, Y.; Zhong, M.; Barnes, J. C.; Ehrlich, D. J. C.; Johnson, J. A.* J. Am. Chem. Soc. 2016, 138, 9369-9372.
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Lab
“Reactions of persistent carbenes with hydrogen-terminated silicon surfaces”
Zhukhovitskiy, A. V.; Mavros, M. J.; K.T. Queeney; Wu, T.; Van Voorhis, T.; Johnson, J. A.* J. Am. Chem. Soc. 2016, 138, 8639-8652.

Selected Highlights:
"N-heterocyclic carbenes aminate silicon surfaces" C&E News 2016, 94, 10.
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“Universal cyclic topology in polymer networks”
Wang, R.; Alexander-Katz, A.; Johnson, J. A.*; Olsen, B. D.* Phys. Rev. Lett. 2016, 116, 188302-1-5.
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Lab
“Tailoring the structure of polymer networks with iniferter-mediated photo-growth”
Singh, A.; Kuksenok, O.; Johnson, J. A.*; Balazs, A. C.* Polym. Chem. 2016, 7, 2955-2964.
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Lab
“Light-controlled living radical polymerization: mechanisms, methods, and applications”
Chen, M.†; Zhong, M.†; Johnson, J. A.* Chem. Rev. 2016, 116, 10167-10211.
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Lab
“Highly branched and loop-rich gels via formation of metal-organic cages linked by polymers”
Zhukhovitskiy, A. V.; Zhong, M.; Keeler, E. G.; Michaelis, V. K.; Sun, J. E.P.; Hore, M. J. A.; Pochan, D. J.; Griffin, R. G.; Willard, A. P.; Johnson, J. A.* Nature Chem. 2016, 8, 33-41.

Selected Highlights:
"Hybrid material flexes its muscles" Chemical and Engineering Progress 2015, 111, 7.
"Metal-organic networks go elastic" C&E News 2015, 93, 27.
"Chemists create adaptable metallic-cage gels" MIT News 2015, November 17th.
"Chemists create adaptable metallic-cage gels" Chemeurope.com 2015, November 20th.
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Lab
“Loops versus branch functionality in model click hydrogels”
Kawamoto, K.; Zhong, M.; Wang, R.; Olsen, B. D.*; Johnson, J. A.* Macromolecules 2015, 48, 8980-8988.
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Lab
“Carbene ligands in surface chemistry: from stabilization of discrete elemental allotropes to modification of nanoscale and bulk substrates”
Zhukhovitskiy, A. V.; MacLeod, M. J.; Johnson, J. A.* Chem. Rev. 2015, 115, 11503-11532.
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Lab
“Iterative exponential growth of stereo- and sequence-controlled polymers”
Barnes, J. C.; Ehrlich, D. J.-C.; Gao, A. X.; Leibfarth, F. A.; Jiang, Y.; Zhou, E.; Jamison, T. F.; Johnson, J. A.* Nature Chem. 2015, 7, 810-815.

Selected Highlights:
"Iterative Exponential Growth of Stereo- and Sequence-Controlled Polymers" Synfacts 2016, 12, 0037.
"Click chemistry creates precision polymers" RSC Chemistry World 2015, September 8th.
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Lab
“Scalable synthesis of sequence-defined, unimolecular macromolecules by flow-IEG.”
Leibfarth, F. A.; Johnson, J. A.*; Jamison, T. F.* Proc. Natl. Acad. Sci. U.S.A. 2015, 112, 10617-10622.

Selected Highlights:
"Semiautomated Route to Defined Polymers" C&E News 2015, 93, 5.
"Automated Flow Technique Makes Length- And Sequence-Specific Polymers" C&E@ACS Boston 2015, August 19th.
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Lab
“PEGylated N‑heterocyclic carbene anchors designed to stabilize gold nanoparticles in biologically relevant media.”
MacLeod, M. J.; Johnson, J. A.* J. Am. Chem. Soc. 2015, 137, 7974-7977.
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Lab
“Visible-light-controlled living radical polymerization from a trithiocarbonate iniferter mediated by an organic photoredox catalyst.”
Chen, M.; MacLeod, M. J.; Johnson, J. A.* ACS Macro Lett. 2015, 4, 566-569.
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Lab
“A dual role for 1,2,4,5-tetrazines in polymer networks: combining Diels-Alder reactions and metal coordination to generate functional supramolecular gels”
Kawamoto, K.; Grindy, S. C.; Liu, J.; Holten-Andersen, N.; Johnson, J. A.* ACS Macro Lett. 2015, 4, 458-461.
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Lab
“Improving photo-controlled living radical polymerization from trithiocarbonates through the use of continuous-flow techniques”
Chen, M.; Johnson, J. A.* Chem. Commun. 2015, 51, 6742-6745.
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Lab
“Cycloelimination of imidazolidin-2-ylidene N-heterocyclic carbenes: mechanism and insights into the synthesis of stable 'NHC-CDI' amidinates”
Zhukhovitskiy, A. V.; Geng, J.; Johnson, J. A.* Chem. Eur. J. 2015, 21, 5685-5688.

Selected Highlights:
"Cover Profile" Chem. Eur. J. 2015, 21, 5649.
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Lab
“Redox responsive branched bottlebrush polymers for in vivo MRI and fluorescence imaging”
Sowers, M. A.; McCombs, J. R.; Wang, Y.; Paletta, J. T.; Morton, S. W.; Dreaden, E. C.; Boska, M. D.; Ottaviani, M. F.; Hammond, P. T.; Rajca, A.; Johnson, J. A.* Nature Commun. 2014, 5, DOI: 10.1038/ncomms6460.

Selected Highlights:
"Two Sensors In One" MIT News 2014, November 18th.
"Organic, Non-toxic Sensor Allows Dual MRI and Fluorescent Imaging" NIH NIBIB Science Highlight 2015, March 2nd.
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“Photo-responsive hydrogels for adaptive membranes”
Díaz Díaz, D.*; Johnson, J. A. Smart Membranes and Sensors 2014, John Wiley & Sons, Inc. (Book Chapter)
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Lab
“Synthesis of acid-labile PEG and PEG-doxorubicin-conjugate nanoparticles via brush-first ROMP”
Gao, A. X.; Liao, L.; Johnson, J. A.* ACS Macro Lett. 2014, 3, 854-857.
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Lab
“Crossover experiments applied to network formation reactions: improved strategies for counting elastically inactive molecular defects in PEG gels and hyperbranched polymers”
Zhou, H.; Schön, E.-M.; Wang, M.; Glassman, M. J.; Liu, J.; Zhong, M.; Díaz, D. D.; Olsen, B. D.; Johnson, J. A.* J. Am. Chem. Soc. 2014, 136, 9464-9470.
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Lab
“A convergent synthetic platform for single-nanoparticle combination cancer therapy: ratiometric loading and controlled released of cisplatin, doxorubicin, and camptothecin”
Liao, L.; Liu, J.; Dreaden, E. C.; Morton, S. W.; Shopsowitz, K. E.; Hammond, P. T.; Johnson, J. A.* J. Am. Chem. Soc. 2014, 136, 5896-5899.

Selected Highlights:
"Nanoparticles Deliver Three Cancer Drugs to Tumors" C&E News 2014, 19, 9.
"Nanoparticles Serve Up Calibrated Cocktails To Treat Cancer" JACS Spotlights 2014, 136, 6511.
"Targeting Cancer with a Triple Threat" MIT News 2014, April 15th.
"Trois Anticancéreux Dans Une Nanoparticule" Le Monde 2014, April 21st.
"New Nanoparticles Can Deliver Three Cancer Drugs at Once" Business Standard 2014, April 16th.
"Super Cancer-fighting Nanoparticle Built Like a Lego Set" Qmed 2014, April 15th.
"Nanoparticles Deliver Three Cancer Drugs at Once" I. F. L. S. 2014, April 15th.
"Drug-delivering Nanoparticles Pose a Triple Threat to Cancer" Gizmag 2014, April 16th.
"MIT researchers create polymer nanoparticle for cancer drug delivery" in-Pharma Technologist.com 2014, May 15th.
"Revolutionary Nanoparticle Based Drug Delivery - Targeted Cancer Therapeutics Interview" SelectScience 2014, June 10th.
"Targeting cancer with a triple threat: new nanoparticles can deliver three drugs at once" ScienceDaily 2014, April 15th.
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Lab
“Brush-first synthesis of core-photodegradable miktoarm star polymers via ROMP: towards photoresponsive self-assemblies”
Burts, A. O.; Gao. A. X.; Johnson, J. A.* Macromol. Rap. Commun. 2014, 35, 168-173.
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Lab
“Brush-first and click: efficient synthesis of nanoparticles that degrade and release doxorubicin in response to light”
Burts, A. O.; Liao, L.; Lu, Y. Y.; Tirrell, D. A.; Johnson, J. A.* Photochem. Photobiol. 2014, 90, 380-385.
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“Particles without a box: brush-first synthesis of photodegradable PEG star polymers under ambient conditions”
Liu, J.; Gao, A. X.; Johnson, J. A.* J. Vis. Exp. 2013, (80), e50874, DOI:10.3791/50874
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“Synthesis of model network hydrogels via tetrazine-olefin inverse electron demand Diels-Alder cycloaddition”
Cok, A. M.; Zhou, H.; Johnson, J. A.* Macromol. Symp. 2013, 329, 108-112.
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Lab
“Addressable carbene anchors for gold surfaces”
Zhukhovitskiy, A. V.; Mavros, M. G.; Van Voorhis, T.; Johnson, J. A.* J. Am. Chem. Soc. 2013, 135, 7418-7421.

Selected Highlights:
"Carbene For Gold Surfaces" C&E News: News of the Week 2013, 91, 11.
"A New Kind of Chemical Glue" MIT News 2013, May 29th.
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Lab
“Photo-controlled growth of telechelic polymers and end-linked polymer gels”
Zhou, H.; Johnson, J. A.* Angew. Chem. Int. Ed. 2013, 52, 2235-2238.

Selected Highlights:
"Polymer Chemistry: Rooftop Reactions" Nature Chemistry 2013, 5, 366-368.
"Light Makes Pores in Polymer Gel Bigger" Materials 360 2013, May 15th.
"Pores for Thought: Just Shine a Light" Spectroscopy NOW 2013, February 15th.
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“Reply to Stadler: combining network disassembly spectrometry with rheology/spectroscopy”
Olsen, B. D.; Johnson, J. A.* Proc. Natl. Acad. Sci. U.S.A. 2013, 110, E1973.
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Lab
“Application of 1H DOSY for facile measurement of polymer molecular weights”
Li, W.; Chung, H.; Daeffler, C.; Johnson, J. A.*; Grubbs, R. H.* Macromolecules 2012, 45, 9595-9603.
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Lab
“Counting primary loops in polymer gels”
Zhou, H.; Woo, J.; Cok, A. M.; Wang, M.; Olsen, B. D.; Johnson, J. A.* Proc. Natl. Acad. Sci. U.S.A. 2012, 109, 19119-19124.

Selected Highlights:
"Polymer Chemistry: Wasted Loops Quantified" Nature 2013, 493, 172-173.
"Counting Loops in Gels" Nature 2012, 491, 304-305.
"A Step Toward Stronger Polymers" MIT News 2012, November 5th.
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Lab
“'Brush-first' method for the parallel synthesis of photocleavable, nitroxide-labeled PEG star polymers.”
Liu, J.; Burts, A. O.; Li, Y.; Zhukhovitskiy, A. Z.; Ottaviani, M. F.; Turro, N. J.; Johnson, J. A.* J. Am. Chem. Soc. 2012, 134, 16337-16344.

Selected Highlights:
"Synthesis of Photocleavable Star Polymers by the 'Brush-First' Method" Synfacts 2012, 8, 1321.

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Lab
“Using EPR To compare PEG-branch-nitroxide 'bivalent-brush polymers' and traditional PEG bottle-brush polymers: branching makes a difference”
Burts, A. O.; Li, Y.; Zhukhovitskiy, A. Z.; Patel, P. R.; Grubbs, R. H.; Ottaviani, M. F.; Turro, N. J.; Johnson, J. A.* Macromolecules 2012, 45, 8310-8318.
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Lab
“EPR study of spin-labeled brush polymers in organic solvents.”
Xia, Y.; Li, Y.; Burts, A. O.; Ottaviani, M. F.; Tirell, D. A.; Johnson, J. A.*; Turro, N. J.*; Grubbs, R. H.* J. Am. Chem. Soc. 2011, 133, 19953-19959.
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Selected Publications Prior to MIT:
“Core-clickable PEG-branch-azide bivalent-bottle-brush polymers by ROMP: grafting-through and clicking-to.”
Johnson, J. A.; Lu, Y.-Y.; Burts, A. O.; Lim, Y.-H.; Finn, M. G.; Koberstein, J. T.; Turro, N. J.; Tirrell, D. A.; Grubbs, R. H. J. Am. Chem. Soc. 2011, 133, 559-566.
“Drug-loaded, bivalent-bottle-brush polymers by graft-through ROMP.”
Johnson, J. A.; Lu, Y. Y.; Burts, A. O.; Xia, Y.; Durrell, A. C.; Tirrell, D. A.; Grubbs, R. H. Macromolecules 2010, 43, 10326-10335.
“Residue-specific incorporation of non-canonical amino acids into proteins: recent developments and applications.”
Johnson, J. A.; Lu, Y. Y.; Van Deventer, J. A.; Tirrell, D. A. Curr. Opion. Chem. Biol. 2010, 14, 774-780.
“Copper-free click chemistry for the in situ crosslinking of photodegradable star polymers.”
Johnson, J. A.; Baskin, J. M.; Bertozzi, C. R.; Koberstein, J. T.; Turro, N. J. Chem. Commun. (Cambridge, U. K.) 2008, 3064-3066.
“Construction of linear polymers, dendrimers, networks, and other polymeric architectures by copper-catalyzed azide-alkyne cycloaddition click chemistry.”
Johnson, J. A.; Finn, M. G.; Koberstein, J. T.; Turro, N. J. Macromol. Rapid Commun. 2008, 29, 1052-1072.
“Synthesis of photocleavable linear macromonomers by ATRP, and star macromonomers by a tandem ATRP-click reaction: precursors to photodegradable model networks.”
Johnson, J. A.; Finn, M. G.; Koberstein, J. T.; Turro, N. J. Macromolecules 2007, 40, 3589-3598.
“Synthesis of degradable model networks via ATRP and click chemistry.”
Johnson, J. A.; Lewis, D. R.; Diaz, D. D.; Finn, M. G.; Koberstein, J. T.; Turro, N. J. J. Am. Chem. Soc. 2006, 128, 6564-6565.

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Moving in: work in progress

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