DETECTION OF MILLIMONOLAYERS OF OXYGEN ON GAAS(001) - OBSERVATION OF EDGE-EFFECT RAINBOW ENHANCEMENT IN IMPACT COLLISION ION-SCATTERING SPECTROSCOPY

Authors
ANZ SJ NAFISI K ALLEN JS RUSSELL AM WILLIAMS RS
Citation
Sj. Anz et al., DETECTION OF MILLIMONOLAYERS OF OXYGEN ON GAAS(001) - OBSERVATION OF EDGE-EFFECT RAINBOW ENHANCEMENT IN IMPACT COLLISION ION-SCATTERING SPECTROSCOPY, Surface science, 373(2-3), 1997, pp. 371-378
Citations number
19
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
373
Issue
2-3
Year of publication
1997
Pages
371 - 378
Database
ISI
SICI code
0039-6028(1997)373:2-3<371:DOMOOO>2.0.ZU;2-C
Abstract
Time-of-flight impact collision ion-scattering spectroscopy (TOF-ICISS ) data obtained with 12 keV Ar+ scattered from a GaAs(001) surface rev ealed the presence of millimonolayer amounts of oxygen. This magnitude of detection sensitivity is the result of an edge-effect rainbow sing ularity initiated by the forward scattering of argon by oxygen. Analys is of the TOF-ICISS data shows that the oxygen atoms are bonded primar ily to surface gallium atoms.