KIP publications

 
year 2015
author(s) Jan Pischel and Annemarie Pucci
title Low-Temperature Adsorption of Carbon Monoxide on Gold Surfaces: IR Spectroscopy Uncovers Different Adsorption States on Pristine and Rough Au(111)
KIP-Nummer HD-KIP 15-47
KIP-Gruppe(n) F6
document type Paper
Keywords carbon monoxide, adsorption, chemisorption, physisorption, Au(111), gold, atomic scale roughness, nanostructured gold, nanostructured Cu(110), dipole coupling, chemical shift, CO ice, IRRAS.
source J. Phys. Chem. C 119 (2015) 18340-18351
doi 10.1021/acs.jpcc.5b05051
Abstract (en)

The morphology of gold surfaces plays a major role in many domains of contemporary research. Infrared (IR) spectroscopy in combination with carbon monoxide (CO) as a probe adsorbate is able to sensitively monitor differences in the morphology of gold surfaces on an atomic level if CO adsorption on the various surfaces is clarified. Our investigation comprises the first study of CO adsorption on Au(111) under well-defined ultra-high vacuum conditions at 30K. We find that CO adsorbs on Au(111) in atop geometry as has been reported before for a variety of gold surfaces but a significantly higher frequency of the internal CO stretching vibration is observed confirming results from recent theoretical studies. Furthermore, the presence of a submonolayer amount of gold adatoms on the Au(111) surface results in the properties of gold surfaces towards CO adsorption at higher temperatures known from literature. Step-wise annealing of these atomically rough surfaces leads to a gradual transition between the literature case and the behavior observed on the pristine Au(111) surface at 30K.

bibtex
@article{Pischel15,
  author   = {Pischel, Jan and Pucci, Annemarie},
  title    = {Low-Temperature Adsorption of Carbon Monoxide on Gold Surfaces: IR Spectroscopy Uncovers Different Adsorption States on Pristine and Rough {Au}(111)},
  journal  = {J. Phys. Chem. C},
  year     = {2015},
  volume   = {119},
  pages    = {18340--18351},
  doi      = {10.1021/acs.jpcc.5b05051},
  url      = {http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b05051}
}
URL doi: 10.1021/acs.jpcc.5b05051
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