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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)
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author
; ; ; ; ; ; and
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
2016-04-01 13:05:53
date last changed
2022-02-26 19:17:34
@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}},
  keywords     = {{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}},
  doi          = {{10.1016/j.susc.2009.07.043}},
  volume       = {{603}},
  year         = {{2009}},
}