journals
H.N. Schwerdt, E. Zhang, M.J. Kim, T. Yoshida, L. Stanwicks, S. Amemori, H.E. Dagdeviren, R. Langer, M.J. Cima, and A.M. Graybiel, Cellular scale probes enable stable chronic subsecond monitoring of dopamine neurochemicals in a rodent model, Communications Biology, vol. 144, pp. 1–11., Sept. 2018.
H.N. Schwerdt, H. Shimazu, K. Amemori, S. Amemori, P.L. Tierney, D.J. Gibson, S. Hong, T. Yoshida, R. Langer, M.J. Cima, and A.M. Graybiel, Long-term dopamine neurochemical monitoring in primates, Proceedings of the National Academy of Sciences, vol. 114, no. 50, pp. 13260–13265, Nov. 2017.
H.N. Schwerdt, M.J. Kim, S. Amemori, D. Homma, T. Yoshida, H. Shimazu, H. Yerramreddy, E. Karasan, R. Langer, A.M. Graybiel, and M. J. Cima, Subcellular probes for neurochemical recording from multiple brain sites, Lab Chip, vol. 17, no. 6, pp. 1104–1115, March 2017.
H.N. Schwerdt, F.A. Miranda, and J. Chae, Wireless Fully Passive Multichannel Recording of Neuropotentials Using Photo-Activated RF Backscattering Methods, IEEE Transactions on Microwave Theory and Techniques, vol. 63, no. 9, pp. 2965–2970, Sept. 2015.
H.N. Schwerdt, U.A. Amjad, J. Appel, A. Elhadi, T. Lei, M. Preul, R. Bristol, and J. Chae, In Vitro Hydrodynamic, Transient, and Overtime Performance of a Miniaturized Valve for Hydrocephalus, Annals of Biomedical Engineering, vol. 43, no. 3, pp. 603–615, March 2015.
H.N. Schwerdt, R. Bristol, and J. Chae, Miniaturized Passive Hydrogel Check Valve for Hydrocephalus Treatment, IEEE Transactions on Biomedical Engineering, vol. 61, no. 3, pp. 814–820, March 2014.
H.N. Schwerdt, F.A. Miranda, and J. Chae, Analysis of Electromagnetic Fields Induced in Operation of a Wireless Fully Passive Backscattering Neurorecording Microsystem in Emulated Human Head Tissue, IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 5, pp. 2170–2176, May 2013.
H.N. Schwerdt, F.A. Miranda, and J. Chae, A Fully Passive Wireless Backscattering Neuro-Recording Microsystem Embedded in Dispersive Human Head Phantom Medium, IEEE Electron Device Letters, vol. 33, no. 6, pp. 908–910, June 2012.
H.N. Schwerdt, W. Xu, S. Shekhar, A. Abbaspour-Tamijani, B. Towe, F. Miranda, and J. Chae, A Fully-Passive Wireless Microsystem for Recording of Neuropotentials using RF Backscattering Methods, IEEE/ASME Journal of Microelectromechanical Systems, vol. 20, no. 5, pp.1119–1130, Oct. 2011.
conference papers
H. N. Schwerdt, M. J. Kim, E. Karasan, S. Amemori, D. Homma, H. Shimazu, T. Yoshida, R. Langer, A. M. Graybiel, and M. J. Cima, “Subcellular electrode arrays for multisite recording of dopamine in vivo,” in Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS), pp. 549–552, Las Vegas, NV, Jan. 2017.
H.N. Schwerdt, R. Bristol, and J. Chae, “An Implantable Hydrogel Check Valve for Hydrocephalus Treatment – Development and In Vitro Measurements,” In IEEE Solid-State Sensors, Actuators, and Microsystems Workshop, pp. 355–358, Hilton Head Island, SC, June 2014.
H.N. Schwerdt, J. Chae, and F.A. Miranda, “Wireless Performance of a Fully Passive Neurorecording Microsystem Embedded in Dispersive Human Head Phantom,” IEEE International Symposium on Antennas and Propagation (APSURSI), pp. 1–2, Chicago, IL, July 2012.
H.N. Schwerdt, R. Bristol, and J. Chae, “Hydrogel Check Valve with Non-Zero Cracking Pressure for Use as a Potential Alternative Hydrocephalus Treatment Method,” In IEEE Solid-State Sensors, Actuators, and Microsystems Workshop, pp. 137–140, Hilton Head Island, SC, June 2012.
H.N. Schwerdt, W. Xu, S. Shekhar, F. Miranda, and J. Chae, “Preliminary Thermal Characterization of a Fully-Passive Wireless Backscattering MEMS Neuro-Recorder,” In IEEE International Conference on Solid-State Sensors and Actuators (Transducers), pp. 1228–1231, Beijing, China, June 2011.
H.N. Schwerdt, W. Xu, S. Shekhar, A. Abbaspour-Tamijani, B. Towe, and J. Chae, “A Fully-Passive Wireless Microfabricated Neuro-Recorder,” In IEEE Solid-State Sensors, Actuators, and Microsystems Workshop, pp. 258–259, Hilton Head Island, SC, June 2010.
H.N. Schwerdt, J. Tapson, and R. Etienne-Cummings, "A Color Detection Glove with Haptic Feedback for the Visually Disabled," In IEEE Conference on Information Sciences and Systems (CISS), pp. 681–686, Baltimore, MD, May 2009.
conference abstracts
H.N. Schwerdt, M.J. Kim, E. Zhang, S. Amemori, T. Yoshida, R. Langer, M.J. Cima, and A.M. Graybiel, “Multi-site monitoring of subsecond dopamine neurochemical activity in rodents.” In Monitoring Molecules in Neuroscience 2018. Poster 46. Oxford, UK. March 25, 2018.
H.N. Schwerdt, E. Zhang, M.J. Kim, S. Amemori, T. Yoshida, R. Langer, A.M. Graybiel, and M.J. Cima, “Cellular-scale arrays for multi-site neurochemical recording,” In Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy (PittCon). Orlando, FL. Feb. 28, 2018.
H.N. Schwerdt, H. Shimazu, K. Amemori, S. Amemori, S. Hong, T. Yoshida, R. Langer, M.J. Cima, and A.M. Graybiel, “Electrochemical recording of pharmacologically modulated dopamine from sensors chronically implanted in striatum of awake non-human primates,” In Society for Neuroscience (SfN) Annual Meeting, 047.15/T1, Washington D.C., Nov. 2017.
H.N. Schwerdt, M.J. Kim, D. Homma, S. Amemori, T. Yoshida, H. Shimazu, R. Langer, A.M. Graybiel, and M.J. Cima, “Flexible microelectrode arrays for high-density subsecond dopamine recording,” In Society for Neuroscience (SfN) Annual Meeting, 752.08/MMM28, San Diego, CA, Nov. 2016.
H.N. Schwerdt, H. Shimazu, K. Amemori, S. Hong, J.C. Sy, K.C. Spencer, P.L. Tierney, Y. Yang, H. Yerramreddy, C. Dagdeviren, K. Ramadi, R.S. Langer, M.J. Cima, and A.M. Graybiel. “Fast-scan cyclic voltammetric measurements of stimulation-induced dopamine release with chronically implanted carbon fibers in awake non-human primate,” In Society for Neuroscience (SfN) Annual Meeting, 266.03/BB33, Chicago, IL, Oct. 2015.