ELECTRON-INDUCED ADSORPTION, DESORPTION AND DECOMPOSITION OF AMMONIA ON GAAS(100)

Authors
SUN YM SLOAN DW HUETT T WHITE JM EKERDT JG
Citation
Ym. Sun et al., ELECTRON-INDUCED ADSORPTION, DESORPTION AND DECOMPOSITION OF AMMONIA ON GAAS(100), Surface science, 295(1-2), 1993, pp. 120000982-120000986
Citations number
9
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
295
Issue
1-2
Year of publication
1993
Pages
120000982 - 120000986
Database
ISI
SICI code
0039-6028(1993)295:1-2<120000982:EADADO>2.0.ZU;2-N
Abstract
The desorption and dissociation of ammonia adsorbed on (GaAs(100) occu rs readily upon activation with 50 eV electrons. Complementary results from temperature programmed desorption and X-ray photoelectron spectr oscopy indicate that the cross-sections for parent desorption and for dissociation to NH(x) (x = 1, 2) are similar (10(-16)-10(-17) cm 2), w hereas that for nitride production is two orders of magnitude smaller. All these are more than an order of magnitude higher than observed in analogous photon-driven reactions.