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The low and high coverage adsorption structure of CO on unreconstructed Ir(100)-(1×1)

Arman, Mohammad Alif LU ; Lundgren, Edvin LU and Knudsen, Jan LU (2025) In Surface Science 761.
Abstract

The investigation of carbon monoxide (CO) adsorption on the unreconstructed Ir(100)-(1 × 1) surface under ultra-high vacuum (UHV) conditions is studied with scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and high-resolution core-level spectroscopy (HRCLS). At a low coverage of 0.5 ML (monolayer), CO molecules adopt a previously documented c(2 × 2) structure, having CO molecules adsorbed exclusively in the top sites. When the coverage increases to 0.83 ML, a c(6 × 2) phase is observed having a combination of bridge and top adsorption sites positions. A comprehensive picture of CO adsorption on Ir(100)-(1 × 1) is presented here by correlating the spectroscopic data with the observed distinct structural... (More)

The investigation of carbon monoxide (CO) adsorption on the unreconstructed Ir(100)-(1 × 1) surface under ultra-high vacuum (UHV) conditions is studied with scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and high-resolution core-level spectroscopy (HRCLS). At a low coverage of 0.5 ML (monolayer), CO molecules adopt a previously documented c(2 × 2) structure, having CO molecules adsorbed exclusively in the top sites. When the coverage increases to 0.83 ML, a c(6 × 2) phase is observed having a combination of bridge and top adsorption sites positions. A comprehensive picture of CO adsorption on Ir(100)-(1 × 1) is presented here by correlating the spectroscopic data with the observed distinct structural formations from STM and LEED.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CO, CO adsorption, Core-level spectroscopy;STM, High resolution core level photoemission spectroscopy (HRCLS), Ir(100), Iridium, LEED, Surface reconstruction
in
Surface Science
volume
761
article number
122786
publisher
Elsevier
external identifiers
  • scopus:105008101878
ISSN
0039-6028
DOI
10.1016/j.susc.2025.122786
language
English
LU publication?
yes
id
3e01d142-273f-4df9-a596-af81a7df9424
date added to LUP
2025-10-28 15:28:37
date last changed
2025-10-29 08:18:59
@article{3e01d142-273f-4df9-a596-af81a7df9424,
  abstract     = {{<p>The investigation of carbon monoxide (CO) adsorption on the unreconstructed Ir(100)-(1 × 1) surface under ultra-high vacuum (UHV) conditions is studied with scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and high-resolution core-level spectroscopy (HRCLS). At a low coverage of 0.5 ML (monolayer), CO molecules adopt a previously documented c(2 × 2) structure, having CO molecules adsorbed exclusively in the top sites. When the coverage increases to 0.83 ML, a c(6 × 2) phase is observed having a combination of bridge and top adsorption sites positions. A comprehensive picture of CO adsorption on Ir(100)-(1 × 1) is presented here by correlating the spectroscopic data with the observed distinct structural formations from STM and LEED.</p>}},
  author       = {{Arman, Mohammad Alif and Lundgren, Edvin and Knudsen, Jan}},
  issn         = {{0039-6028}},
  keywords     = {{CO; CO adsorption; Core-level spectroscopy;STM; High resolution core level photoemission spectroscopy (HRCLS); Ir(100); Iridium; LEED; Surface reconstruction}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Surface Science}},
  title        = {{The low and high coverage adsorption structure of CO on unreconstructed Ir(100)-(1×1)}},
  url          = {{http://dx.doi.org/10.1016/j.susc.2025.122786}},
  doi          = {{10.1016/j.susc.2025.122786}},
  volume       = {{761}},
  year         = {{2025}},
}