Seminars arranged by CaSTL

# Watching solids and liquids through the ultrafast shock compression microscope

CaSTL Seminar Series and the Center for Chemical Innovation presents: Dana D. Dlott -  University of Illinois

Title: Watching solids and liquids through the ultrafast shock compression microscope

# Nanomaterials and Light: New Opportunities in Energy Research

CaSTL Seminar Series and the Center for Chemical Innovation presents: Matthew Sheldon, Texas A&M University

Matthew T. Sheldon received his BA from Carleton College (Chemistry), PhD from UC Berkeley (Chemistry), and performed his postdoc at Caltech (Mat.Sci/App.Phys). He is the recipient of the 2015 Air Force Office of Scientific Research Young Investigator Program (AFOSR YIP) Award, the Kaneka Junior Faculty Award (2017), and was selected as a 2017 Inventor Fellow by the Gordon and Betty Moore Foundation.

# Chiral Scattering, Photo-induced Voltages and Forces in Achiral Plasmonic Systems

CaSTL Seminar Series and the Center for Chemical Innovation presents: Luat T. Vuong - Chiral Scattering, Photo-induced Voltages and Forces in Achiral Plasmonic Systems

# How local environments impact chemical reaction dynamics: ultrafast Raman spectroscopy on the nanoscale

CaSTL Seminar Series and the Center for Chemical Innovation presents: Renee R. Fronteria - How local environments impact chemical reaction dynamics: ultrafast Raman spectroscopy on the nanoscale

# Dynamics in Small Metal Clusters

CaSTL Seminar Series and the Center for Chemical Innovation presents: Dynamics in Small Metal Clusters

Theodore Goodson III, Department of Chemistry, University of Michigan

# Ultrafast extreme ultraviolet spectroscopy reveals short-lived states in transition metal complexes and organohalide perovskite semiconductors

Abstract: X-ray absorption near edge spectroscopy (XANES or NEXAFS) is a powerful technique for electronic structure determination.  However, widespread use of XANES is limited by the need for synchrotron light sources with tunable x-ray energy.

# Probing Molecular-Scale Catalytic Interaction between Oxygen and Cobalt Phthalocyanine Using Tip-Enhanced Raman Spectroscopy

Ultrahigh vacuum tip-enhanced Raman spectroscopy (UHV-TERS) is used to investigate adsorption of molecular oxygen (O2) with cobalt (II) phthalocyanine (CoPc) supported on Ag(111) single crystal surfaces, which is the initial step for the oxygen reduction reaction (ORR) using metal Pc catalysts. Two adsorption configurations are primarily observed, assigned as O2/CoPc/Ag(111) and O/CoPc/Ag(111) based on scanning tunneling microscopy (STM) imaging, TERS, isotopologue substitution, and density functional theory (DFT) calculations.

# Investigations of excited state structural dynamics using femtosecond time-resolved absorption and stimulated Raman scattering spectroscopic techniques

Investigation of molecular dynamics with sufficient time and spectral resolution is very crucial for understanding the mechanistic aspects of any photophysical and photochemical process. In this seminar, I will briefly discuss about the femtosecond transient absorption technique and then introduce with the ultrafast Raman loss spectroscopic (URLS) technique that is analogous to femtosecond stimulated Raman scattering (FSRS) spectroscopy. These spectroscopic techniques (URLS/FSRS) offer excellent frequency and time resolution to decipher molecular dynamics at ultrafast timescales.

# When Like Meets Unlike: Electonic Structure and Dynamics at Interfaces

Molecular interfaces play a dominant role in much of Chemistry, and are of vital importance in diverse applications such as sensing, catalysis and electron transfer. Yet the mere fact of coupling two fundamentally different materials, e.g.