OVERLAYER STRUCTURE FROM ADSORBATE AND SUBSTRATE CORE-LEVEL BINDING-ENERGY SHIFTS - CO, CCH3 AND O ON PT(111)

Authors
BJORNEHOLM O NILSSON A TILLBORG H BENNICH P SANDELL A HERNNAS B PUGLIA C MARTENSSON N
Citation
O. Bjorneholm et al., OVERLAYER STRUCTURE FROM ADSORBATE AND SUBSTRATE CORE-LEVEL BINDING-ENERGY SHIFTS - CO, CCH3 AND O ON PT(111), Surface science, 315(1-2), 1994, pp. 120000983-120000989
Citations number
38
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
315
Issue
1-2
Year of publication
1994
Pages
120000983 - 120000989
Database
ISI
SICI code
0039-6028(1994)315:1-2<120000983:OSFAAS>2.0.ZU;2-6
Abstract
By combining high resolution photoemission measurements of adsorption induced binding energy shifts of both adsorbate and substrate core lev els the nature and distribution of adsorption sites in the CO/Pt(111) system can be determined. The existence of different surface shifted c omponents demonstrates the local character of the surface core level s hift. This is used to study the O/Pt(111) (2 x 2) and CCH3/Pt(111) ''( 2 x 2)'' phases. The intensity relations of the different surface peak s suggest O/Pt(111) to be a true (2 x 2) phase, while the CCH3/Pt(111) ''(2 x 2)'' phase is proposed to consist of three equivalent (2 x 1) domains.