Advanced

C-60 submonolayers on the Si(111)-(7 x 7) surface: Does a mixture of physisorbed and chemisorbed states exist?

Gangopadhyay, S.; Woolley, R. A. J.; Danza, R.; Phillips, M. A.; Schulte, Karina LU ; Wang, Li; Dhanak, V. R. and Moriarty, P. J. (2009) In Surface Science 603(18). p.2896-2901
Abstract
We have carried out a combined X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy(UPS), and scanning tunnelling microscopy (STM) study of the C-60-Si(1 1 1) interaction where the XPS/UPS spectrometer and STM are integrated on a single UHV system. This enables a direct comparison of the XPS/UPS spectra with the STM data and eliminates any uncertainty in C-60 coverage measurements. X-ray standing wave measurements and density functional theory calculations have been used to support and interpret the results of the XPS/UPS/STM experiments. Our data conclusively rule out models of C-60 adsorption which involve a mixture of physisorbed and chemisorbed molecules [K. Sakamoto, et al., Phys. Rev. B 60 (1999) 2579].... (More)
We have carried out a combined X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy(UPS), and scanning tunnelling microscopy (STM) study of the C-60-Si(1 1 1) interaction where the XPS/UPS spectrometer and STM are integrated on a single UHV system. This enables a direct comparison of the XPS/UPS spectra with the STM data and eliminates any uncertainty in C-60 coverage measurements. X-ray standing wave measurements and density functional theory calculations have been used to support and interpret the results of the XPS/UPS/STM experiments. Our data conclusively rule out models of C-60 adsorption which involve a mixture of physisorbed and chemisorbed molecules [K. Sakamoto, et al., Phys. Rev. B 60 (1999) 2579]. Instead, we find that all molecules, up to 1 monolayer coverage, bond to the surface via Si-C bonds which are predominantly of covalent character. (C) 2009 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Scanning tunnelling microscopy, Interface, Silicon, C-60, Adsorption
in
Surface Science
volume
603
issue
18
pages
2896 - 2901
publisher
Elsevier
external identifiers
  • wos:000270640700011
  • scopus:69949161264
ISSN
0039-6028
DOI
10.1016/j.susc.2009.07.043
language
English
LU publication?
yes
id
f8da0616-c12a-4b5f-a81f-dfcab39d17d7 (old id 1507197)
date added to LUP
2009-11-20 15:28:40
date last changed
2017-01-01 05:28:01
@article{f8da0616-c12a-4b5f-a81f-dfcab39d17d7,
  abstract     = {We have carried out a combined X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy(UPS), and scanning tunnelling microscopy (STM) study of the C-60-Si(1 1 1) interaction where the XPS/UPS spectrometer and STM are integrated on a single UHV system. This enables a direct comparison of the XPS/UPS spectra with the STM data and eliminates any uncertainty in C-60 coverage measurements. X-ray standing wave measurements and density functional theory calculations have been used to support and interpret the results of the XPS/UPS/STM experiments. Our data conclusively rule out models of C-60 adsorption which involve a mixture of physisorbed and chemisorbed molecules [K. Sakamoto, et al., Phys. Rev. B 60 (1999) 2579]. Instead, we find that all molecules, up to 1 monolayer coverage, bond to the surface via Si-C bonds which are predominantly of covalent character. (C) 2009 Elsevier B.V. All rights reserved.},
  author       = {Gangopadhyay, S. and Woolley, R. A. J. and Danza, R. and Phillips, M. A. and Schulte, Karina and Wang, Li and Dhanak, V. R. and Moriarty, P. J.},
  issn         = {0039-6028},
  keyword      = {Scanning tunnelling microscopy,Interface,Silicon,C-60,Adsorption},
  language     = {eng},
  number       = {18},
  pages        = {2896--2901},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {C-60 submonolayers on the Si(111)-(7 x 7) surface: Does a mixture of physisorbed and chemisorbed states exist?},
  url          = {http://dx.doi.org/10.1016/j.susc.2009.07.043},
  volume       = {603},
  year         = {2009},
}