[PAST EVENT] Feeling Hot, Hot, Hot! How Molecules Report Temperature-Dependent Processes on Nanoparticle Surfaces

April 29, 2022
3pm - 4pm
Integrated Science Center (ISC), Room 1127
540 Landrum Dr
Williamsburg, VA 23185Map this location
title and details of seminar, graphic includes headshot of speaker.

Cheminar on Friday 29 April presents:

Feeling Hot, Hot, Hot! How Single Molecules Report Temperature-Dependent Processes on Nanoparticle Surfaces

Noble metal nanoparticles (~10-100 nm in size) have attracted significant interest due to their ability to support localized surface plasmons, in which light drives collective motion of the surface conduction electrons in the material. Plasmon excitation not only gives these nanoparticles brilliant colors, but also allows light to be harvested and transformed into other forms of energy, including thermal energy (heat) and chemical energy (hot charge carriers). This talk will discuss how single molecule fluorescence and super-resolution imaging can be used to interrogate the effects of local heating on the surface of gold nanoparticles as well as recent progress towards the development of a nanothermometry technique capable of reporting on quantitative temperature with <20 nm spatial resolution.  

Katherine (Kallie) Willets is a Professor of Chemistry at Temple University. She received a B.A. in Chemistry from Dartmouth College, then to Stanford University for a PhD in Physical Chemistry. Her lab focuses on understanding heterogeneity at nanoscale interfaces. She served on the Defense Science Study Group and runs programs to promote a more inclusive & equitable environment.