Nanoengineering group is part of the Rohsenow Kendall Heat Transfer Laboratory. Major facilities in our group are list below.


Laser facilities for electron and phonon transport studies


Time-domain thermoreflectance (TDTR) system

  • Spectra-Physics Tsunami ultrafast mode-locked Ti:sapphire laser with ~100 fs pulse width.
  • Two-color (400 nm and 800 nm) and two-tint (785 ± 3 nm) detection with modulated pump-probe beam.
  • Capable of through-plane and in-plane thermal transport analysis.

Frequency-domain thermoreflectance (FDTR) system

  • Coherent OBIS solid-state continuous wave (CW) 405 nm and 532 nm laser equipped with a fully automated 3-D translational stage with 2-D beam-offset capability.
  • Capable of through-plane and in-plane thermal transport analysis.
  • Capable of fully-automated 2-D thermal conductivity and interfacial thermal conductance mapping.

Transient thermal grating (TTG) system

  • Light Conversion Pharos 1060 nm femtosecond laser with high-power (10 W) output with 290 fs pulse width.
  • Light Conversion HIRO high-power harmonic generator with second and fourth harmonic output (515 nm and 257 nm).
  • Light Conversion Orpheus-HP femtosecond collinear optical parametric amplifier (OPA) with a tunable wavelength 310-16000 nm.
  • Coherent Sapphire SF solid-state continuous-wave (CW) 532 nm laser.
  • Capable of diffusive and non-diffusive 2-D electron and phonon transport analysis with dual-mode heterodyne detection.

Macroscopic thermal conductivity measurement facillities


Steady-state and transient thermal conductivity measurement systems

  • Custom-built vacuum chamber with electrical feedthrough and optical window.
  • Capable of 1-D thermal transport analysis.

Netzsch LFA 457 laser flash system

  • Measurement of thermal diffusivity between -125 °C and 1100 °C.

Materials fabrication facilities


Custom-built polymer processing systems

  • Continuous polymer melt extrusion and drawing system.
  • Fabrication of high-thermal-conductivity polymer fibers and films.

Chemical fume hoods

  • Synthesis of polymers and hydrogels.

Leica EM ACE600 high-vacuum sputter

  • Fully automated multi-target sputter system for the metal thin-film deposition (Au, Ti, Al, Mo and etc..).

Materials characterization facilities


Agilent Cary 7000 UV-Vis-NIR spectrometer

  • Wide detection wavelength range 190 - 2800 nm
  • Measurement of specular reflection and direct and variable angle transmission with s and p polarized lights.
  • Measurement of diffuse scattered transmission and reflection.

Horiba LabRAM Evolution HR confocal Raman microscope

  • 532 nm excitation source with a spectral detection range from ultralow frequency (down to 5 cm-1sup>) to 2500 cm-1sup> with a high throughput single-stage spectrometer.
  • Capable of ultra-fast 2-D and 3-D confocal Raman imaging with a heating/cooling stage.

Netzsch DSC 404 F1 Pegasus high-temperature differential scanning calorimeter

  • Characterization of thermodynamic properties of materials up to 1500 °C.

Energy science and electrochemistry facilities


mBraun LABmaster glovebox workstation

  • Synthesis, storage and characterization of air and moisture sensitive materials and batteries.
Solastation LED

Sciencetech steady-state solar simulator and custom-made LED illumination station

  • Measurement of water evaporation under the sun’s spectrum or specific wavelength emitted by LED lights.

Biologic VSP-300 multi-channel potentiostat

  • Electrochemical characterization of custom-built flow cells and thermally regenerative electrochemical cycle systems (TRECs).
  • Equipped with a multi-channel PID controller with thermocouples and heaters controlled by data acquisition hardware and software.
  • Electrochemical impedance spectroscopy measurement for solutions and hydrogels.

Computer cluster for computational studies of electron and phonon transport dynamics

  • 16 Intel E5530 Xeon computing nodes (2.4 GHz, 8 cores) with 128 GB RAM.
  • 20 Intel E52680 v2 computing nodes (2.8 GHz, 20 cores) with 128 GB RAM.


Linkam Scientific temperature-controlled microscope stage

Oxford Instruments continuous-flow liquid helium and liquid nitrogen cryostat

Edward TIC turbomolecular pumping station

And many more...