Professor; Senior Scientist, Laboratory for Laser Energetics
PhD, University of Minnesota, 1981
Selected Honors & Awards:
Lifetime Achievement Award, University of Rochester (2007)
Weissberger-Williams Lectureship, Eastman Kodak Company (2001)
Clarence Karcher Lectureship, University of Oklahoma, Norman, OK (1996)
Bridging Fellowship for Faculty Research, University of Rochester (1987)
ChE 265/465: Green Chemical Processes
ChE 286/486: Polymer Science & Engineering
Green Chem Engineering; Photoalignment of Liquid Crystals; Photopatterned Liquid Crystal Devices; Amphipolar Hybrid Hosts for Electrophosphorescence; Monodisperse Microemulsions from Microfluidic T-Junctions.
Organic materials constitute the core of our research encompassing molecular design, computational chemistry, material synthesis and processing, and optoelectronic device applications. In particular, we have developed liquid crystals, including conjugated systems, capable of preserving molecular order in glassy state while ensuring long-term stability against crystallization. Various device concepts have been demonstrated using selected materials, e.g. nonabsorbing polarizers, notch filters and reflectors, polarized electroluminescence, field-effect transistors, solid-state lasers, and robust photoalignment films for orienting both fluid and glassy liquid crystals. Current activities include: (1) Amphipolar hybrid hosts for phosphorescent organic light-emitting diodes with potential application to flat-panel display and solid-state lighting; (2) A new concept of surfactancy originating in intramolecular geometric disparity potentially useful for the construction of morphologically stable bulk heterojunction organic photovoltaics; (3) Photopatterned liquid crystal devices for shaping laser beams following photoalignment to significantly improve laser damage thresholds; and (4) High throughput, monodisperse double and triple microemulsions using microfluidic T-junctions as templates for the fabrication of polymer shells as laser fusion targets. While Projects (1) and (2) are cross-disciplinary by nature, Projects (3) and (4) are conducted in close collaboration with scientists and engineers in the Laboratory for Laser Energetics.
Dorrer, C; Wei, S. K.-H.; Leung, P.; Vargas, M.; Wegman, K.; Boulé, J.; Zhao, Z.; Marshall, K. L.; Chen, S. H. "High-damage-threshold Static Laser Beam Shaping Using Optically Patterned Liquid Crystal Devices,” Optics Letters 2011, 36, 4035-4037.
Wei, S. K.-H.; Chen, S. H. "Spatially Resolved Lasers Using a Glassy Cholesteric Liquid Crystal Film with Lateral Pitch Gradient," Applied Physics Letters 2011, 98, 111112.
Wei, S. K.-H.; Zeng, L.; Marshall, K. L.; Chen, S. H. "Room-Temperature Processing of Conjugated Oligomers into Uniaxially Oriented Monodomain Films on Coumarin-Based Photoalignment Layers," J. Polymer Science Part B: Polymer Physics 2011, 49, 725-731.
Zeng, L.; Blanton, T.N.; Chen, S. H. "Modulation of Phase Separation between Spherical and Rodlike Molecules Using Geometric Surfactancy," Langmuir 2010, 26, 12877-12811.
Zeng, L.; Lee, T. Y-H.; Merkel, P. B.; S. H. Chen, S. H. "A New Class of Non-Conjugated Hybrid Hosts for Phosphorescent Organic Light-Emitting Diodes," Journal of Materials Chemistry 2009, 19, 8772-8781.