AVS 64th International Symposium & Exhibition
    Surface Science Division Friday Sessions
       Session SS+HC-FrM

Paper SS+HC-FrM5
Surface Heterogeneity and Inhomogeneous Broadening of Vibrational Line Profiles

Friday, November 3, 2017, 9:40 am, Room 24

Session: Recent Advances in the Chemistry and Physics of Interfaces
Presenter: Martin McCoustra, Heriot-Watt University, UK
Authors: S. Taj, Heriot-Watt University, UK
D. Baird, Heriot-Watt University, UK
A. Rosu-Finsen, Heriot-Watt University, UK
M.R.S. McCoustra, Heriot-Watt University, UK
Correspondent: Click to Email
The surface heterogeneity of amorphous silica (aSiO2) has been probed using coverage dependent temperature programmed desorption (TPD) of a simple probe molecule, carbon monoxide (CO). As a proof-of-principle, the resulting distribution of interaction energies is the foundation from which an environmentally broadened vibrational line profile synthesis has been undertaken. These simulations are compared with measured line profiles recorded at 0.1 cm-1 resolution using reflection–absorption infrared spectroscopy (RAIRS). Additional demonstrations of this methodology on solid water and methanol surfaces will be reported.