PhD Proposal: Rachel Gelfand
Location
Physics : 401
Date & Time
September 1, 2021, 1:00 pm – 3:00 pm
Description
ADVISOR: Dr. Matthew Pelton
TITLE: Resolving the Dynamics of Solid-Liquid Interfaces on the Nanoscale using Colloidal Noble Metal Nanoparticles
ABSTRACT: Colloidal metal nanoparticles, exhibiting strong optical extinction spectra dependent on their size and shape, have made it possible to study the dynamics of solids and liquids on the nanoscale. Through transient absorption measurements, recent studies have shown the existence of measurable slip, liquid viscoelasticity, and intrinsic solid vibrational damping. The exact mechanisms responsible for each of these effects, however, are not yet well understood. This work aims to add to previous studies by exploring the mechanisms behind: interfacial slip between solid-liquid surfaces, intrinsic internal damping, and suspected nonlinear effects. This will combine experiment with simulation by studying a range of different nanoparticle, solvent, and ligand combinations to quantify the damping and slip according to differing parameters. Simultaneously, a comprehensive modeling procedure will be developed which takes these mechanisms into account and provides a complete tool for predicting the mechanical and optical properties of metal nanoparticles.
TITLE: Resolving the Dynamics of Solid-Liquid Interfaces on the Nanoscale using Colloidal Noble Metal Nanoparticles
ABSTRACT: Colloidal metal nanoparticles, exhibiting strong optical extinction spectra dependent on their size and shape, have made it possible to study the dynamics of solids and liquids on the nanoscale. Through transient absorption measurements, recent studies have shown the existence of measurable slip, liquid viscoelasticity, and intrinsic solid vibrational damping. The exact mechanisms responsible for each of these effects, however, are not yet well understood. This work aims to add to previous studies by exploring the mechanisms behind: interfacial slip between solid-liquid surfaces, intrinsic internal damping, and suspected nonlinear effects. This will combine experiment with simulation by studying a range of different nanoparticle, solvent, and ligand combinations to quantify the damping and slip according to differing parameters. Simultaneously, a comprehensive modeling procedure will be developed which takes these mechanisms into account and provides a complete tool for predicting the mechanical and optical properties of metal nanoparticles.
