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Wednesday, July 10

Probing Ultrafast Dynamics and Interfacial Chemistry
Using Femtosecond Laser Spectroscopies

Benjamin Doughty, Columbia University, New York
Chemical Sciences Division Seminar
1:00 PM — 2:00 PM, Chemical and Material Sciences Building (4100) Room J-302
Contact: Bob Shaw (shawrw@ornl.gov), 865.574.4920

Abstract

Spectroscopic measurements probing ultrafast relaxation dynamics and interfacial chemical kinetics will be reviewed in the context of proposed research studying ultrafast processes occurring at the interface of semiconductor nanowires. I will discuss experiments using femtosecond photoelectron spectroscopy to investigate superexcited states of molecular oxygen and nonlinear spectroscopies designed to selectively probe the reaction kinetics of biomolecules at microparticle interfaces. The methods and approaches presented in these studies will be applied to proposed research selectively probing ultrafast excited state dynamics at semiconductor nanowire interfaces, including trap state population and relaxation processes, interfacial excited state dynamics in room temperature ionic liquids, and charge transfer processes in semiconductor nanowire-polymer mixtures.

About the speaker
Benjamin Doughty is a Wigner Fellow candidate.