Type

Journal Article

Authors

Attilio A. Cafolla
Greg Hughes
Sergey A. Krasnikov

Subjects

Physics

Topics
leed surface spectrum analysis auger electron spectroscopy tpd low energy electron diffraction sulphur overlayers au 110

Sulphur overlayers on the Au(110) surface: LEED and TPD study (2007)

Abstract The adsorption and desorption of sulphur on the clean reconstructed Au(1 1 0)–(1 × 2) surface has been studied by low energy electron diffraction, Auger electron spectroscopy and temperature programmed desorption. The results obtained show a complex behaviour of the S/Au(1 1 0) system during sulphur desorption at different temperatures. Two structures of the stable ordered sulphur overlayer on the Au(1 1 0) surface, p(4 × 2) and c(4 × 4), were found after annealing the S/Au(1 1 0) system at 630 K and 463 K, respectively. The corresponding sulphur coverage for these overlayers was estimated by AES signal intensity analysis of the Au NOO and S LMM Auger lines to be equal to 0.13 ML and 0.2 ML, respectively. Both sulphur structures appear after removing an excess of sulphur, which mainly desorbs at 358 K as determined from TPD spectra. Furthermore, it was not possible to produce the lower coverage p(4 × 2) sulphur structure by annealing the c(4 × 4) surface. In the case of the p(4 × 2) S overlayer on the Au(1 1 0)–(1 × 2) surface it is proposed that the sulphur is attached to “missing row” sites only. The c(4 × 4) S overlayer arises via desorption of S2 molecules that are formed on the surface due to mobility of sulphur atoms after a prolonged anneal.
Collections Ireland -> Dublin City University -> Publication Type = Article
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Science and Health
Ireland -> Dublin City University -> Subject = Physical Sciences: Spectrum analysis
Ireland -> Dublin City University -> Subject = Physical Sciences
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: National Centre for Sensor Research (NCSR)
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Science and Health: School of Physical Sciences
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres

Full list of authors on original publication

Attilio A. Cafolla, Greg Hughes, Sergey A. Krasnikov

Experts in our system

1
Attilio A. Cafolla
Dublin City University
Total Publications: 26
 
2
Greg Hughes
Dublin City University
Total Publications: 29
 
3
Sergey A Krasnikov
Trinity College Dublin
Total Publications: 20