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DTSTAMP:20250928T212925Z
DESCRIPTION:Zoom link: https://mcgill.zoom.us/j/86911341204\n\nAbstract:\n
 \nMolecules\, polymers\, and nanocrystals can form the active layer in ele
 ctronic devices such as photovoltaics and light-emitting diodes. Their ele
 ctronic structure and excited state dynamics dictate their function and su
 itability for these applications. Transient absorption (TA) spectroscopy i
 s used to measure these properties\, and has provided remarkable insights 
 into the behavior and function of electronic materials. However\, multiple
  minutes-to-hours are typically required to perform these measurements\, m
 aking it difficult to accurately measure the excited state dynamics of uns
 table and evolving materials systems such as electronic materials during t
 heir synthesis or deposition into a thin film. In this seminar\, I will in
 troduce a novel implementation of TA spectroscopy that can measure transie
 nt spectra in 8 ms\, with good signal-to-noise achieved in ~30 s. This new
  technique is applied to the study of organic molecules during their aggre
 gation into a thin film\, as well as lead-halide perovskite nanocrystals d
 uring their synthesis. These examples demonstrate that in addition to prov
 iding an understanding of how excited state dynamics change during materia
 ls formation\, TA signals measured in situ can reveal new insights into th
 e mechanisms of complex materials formation processes.\n\nBio:\n\nCathy re
 ceived a BSc from McMaster University in Canada\, and earned a PhD at the 
 University of Toronto where she worked with Greg Scholes. After performing
  postdoctoral research in Naomi Ginsberg’s group at Berkeley\, she started
  her independent career as an Assistant Professor at the Department of Che
 mistry and Biochemistry at the University of Oregon. She has received a Do
 ctoral New Investigator award from the ACS Petroleum Research Fund\, a CAR
 EER award from the National Science Foundation\, and was recently named an
  Emerging Scholar in Diverse: Issues In Higher Education magazine.\n
DTSTART:20210316T170000Z
DTEND:20210316T183000Z
SUMMARY:Chemical Society Seminar: Kathy Wong - In situ transient absorption
  spectroscopy during materials formation
URL:/chemistry/channels/event/chemical-society-seminar
 -kathy-wong-situ-transient-absorption-spectroscopy-during-materials-326620
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