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.
|Publication status||Published - 3 Nov 2017|
|Event||American Vacuum Society 64th International Symposium and Exhibition - Tampa, Florida, United States|
Duration: 29 Oct 2017 → 3 Nov 2017
|Conference||American Vacuum Society 64th International Symposium and Exhibition|
|Period||29/10/17 → 3/11/17|
Taj, S., Baird, D., Rosu-Finsen, A., & McCoustra, M. R. S. (2017). Surface Heterogeneity and Inhomogeneous Broadening of Vibrational Line Profiles. Paper presented at American Vacuum Society 64th International Symposium and Exhibition , Tampa, Florida, United States.