Hot oxygen atom ballistics on Pt(111): Collisional desorption of noble gases

被引：29

作者：

Artsyukhovich, AN ^{[1
]}

Harrison, I ^{[1
]}

机构：

[1] UNIV VIRGINIA,DEPT CHEM,CHARLOTTESVILLE,VA 22901

来源：

SURFACE SCIENCE | 1996年 / 350卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

atomistic dynamics; atom-solid scattering; catalysis; diffusion and migration; photon stimulated desorption; Pt(111); surface photochemistry;

D O I：

10.1016/0039-6028(96)00047-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hot oxygen atoms formed by ultraviolet photofragmentation of chemisorbed O-2 on Pt(111) at T-s=20 K induced collisional desorption of coadsorbed noble gases. Angular distributions of desorbing Ar, Kr, and Xe were sharply peaked at similar to 35 degrees from the surface normal. Mean translational energies of the noble gases were in the 0.12 eV (1400 K) range. The O atom photofragments were found to chatter between the surface and the noble gases during the desorption process. The fastest O atom photofragments produced at 250 nm had an energy of at least 0.73 eV.

引用

页码：L199 / L204

页数：6

共 19 条

[1] EFFECTS OF LASER-PULSE CHARACTERISTICS AND THERMAL-DESORPTION PARAMETERS ON LASER-INDUCED THERMAL-DESORPTION
BRAND, JL
GEORGE, SM
[J]. SURFACE SCIENCE, 1986, 167 (2-3) : 341 - 362
[2] SURFACE MIGRATION OF HOT ADATOMS IN THE COURSE OF DISSOCIATIVE CHEMISORPTION OF OXYGEN ON AL(111)
BRUNE, H
WINTTERLIN, J
BEHM, RJ
ERTL, G
[J]. PHYSICAL REVIEW LETTERS, 1992, 68 (05) : 624 - 626
[3] INTERACTION OF OXYGEN WITH AL(111) STUDIED BY SCANNING-TUNNELING-MICROSCOPY
BRUNE, H
WINTTERLIN, J
TROST, J
ERTL, G
WIECHERS, J
BEHM, RJ
[J]. JOURNAL OF CHEMICAL PHYSICS, 1993, 99 (03) : 2128 - 2148
[4] MULTICONFIGURATION TIME-DEPENDENT HARTREE STUDIES OF THE CH3I/MGO PHOTODISSOCIATION DYNAMICS
FANG, JY
GUO, H
[J]. JOURNAL OF CHEMICAL PHYSICS, 1994, 101 (07) : 5831 - 5840
[5] INELASTIC HELIUM SCATTERING STUDIES OF ORDERED AR, KR, AND XE MONOLAYERS PHYSISORBED ON AG(111) - DISPERSION-CURVES, SCATTERING CROSS-SECTIONS, AND EXCITATION LINE-SHAPES
GIBSON, KD
SIBENER, SJ
[J]. JOURNAL OF CHEMICAL PHYSICS, 1988, 88 (12) : 7862 - 7892
[6] LOW-TEMPERATURE ADSORPTION OF O-2 ON PT(III)
GRIMBLOT, J
LUNTZ, AC
FOWLER, DE
[J]. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1990, 52 : 161 - 174
[7] ON PRECURSOR MECHANISMS FOR SURFACE-REACTIONS
HARRIS, J
KASEMO, B
[J]. SURFACE SCIENCE, 1981, 105 (2-3) : L281 - L287
[8] HARRISON I, 1994, P SOC PHOTO-OPT INS, V2125, P285, DOI 10.1117/12.180853
[9] HO W, 1994, SURF SCI, V299, P997
[10] GA-CH3 BOND SCISSION BY ATOMIC-H - THE DEPLETION OF SURFACE CARBON FROM A GALLIUM ALKYL FILM ON SILICON DIOXIDE
LUCAS, SR
PARTLOW, WD
CHOYKE, WJ
YATES, JT
[J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1994, 12 (06): : 3040 - 3047

← 1 2 →