IDENTIFICATION OF OXYGEN SPECIES ON SINGLE-CRYSTAL K(110)

被引：11

作者：

BADDORF, AP ^{[1
]}

ITCHKAWITZ, BS ^{[1
]}

机构：

[1] UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104

来源：

SURFACE SCIENCE | 1992年 / 264卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0039-6028(92)90166-4

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：

The interaction of oxygen with a single-crystal K(110) surface has been studied using HREELS, XPS, and LEED. Vibrational spectroscopy reveals that at 88 K oxygen is initially chemisorbed dissociatively. Higher exposures lead to occupation of subsurface sites and formation of a bulk K2O oxide. In contrast with the interpretations of previous photoemission experiments, no molecular species were observed. Oxygen is transferred from surface to subsurface sites when the sample is annealed to 240 K, or when the surface is irradiated by AlK-alpha X-rays. The latter appears to be a direct photochemical process. Even with both chemisorbed and oxide species present, the surface remains reactive. No long-range order was observed after oxygen adsorption.

引用

页码：73 / 80

页数：8

共 13 条

[1] AN XPS STUDY OF THE ADSORPTION OF OXYGEN ON SILVER AND PLATINUM SURFACES COVERED WITH POTASSIUM OR CESIUM [J].

AYYOOB, M ;

HEGDE, MS .

SURFACE SCIENCE, 1983, 133 (2-3) :516-532

[2] ALKALI-METAL OXIDES .2. UNOCCUPIED AND EXCITED-STATES [J].

BERTEL, E ;

MEMMEL, N ;

JACOB, W ;

DOSE, V ;

NETZER, FP ;

ROSINA, G ;

RANGELOV, G ;

ASTL, G ;

ROSCH, N ;

KNAPPE, P ;

DUNLAP, BI ;

SAALFELD, H .

PHYSICAL REVIEW B, 1989, 39 (09) :6087-6095

[3] ALKALI-METAL OXIDES .1. MOLECULAR AND CRYSTAL-FIELD EFFECTS IN PHOTOEMISSION [J].

BERTEL, E ;

NETZER, FP ;

ROSINA, G ;

SAALFELD, H .

PHYSICAL REVIEW B, 1989, 39 (09) :6082-6086

[4] X-RAY-PHOTOELECTRON-SPECTROSCOPY EVIDENCE FOR PEROXIDE IN 1-2-3 COPPER OXIDES CONTAINING DISORDERED OR EXCESS OXYGEN [J].

DAI, Y ;

MANTHIRAM, A ;

CAMPION, A ;

GOODENOUGH, JB .

PHYSICAL REVIEW B, 1988, 38 (07) :5091-5094

[5]

IBACH H, 1982, ELECT ENERGY LOSS SP, P88

[6]

ITCHKAWITZ B, IN PRESS

[7] EXPERIMENTAL BAND-STRUCTURE OF POTASSIUM AS MEASURED BY ANGLE-RESOLVED PHOTOEMISSION [J].

ITCHKAWITZ, BS ;

LYO, IW ;

PLUMMER, EW .

PHYSICAL REVIEW B, 1990, 41 (12) :8075-8084

[8] CLEAN AND OXYGEN EXPOSED POTASSIUM STUDIED BY PHOTOELECTRON-SPECTROSCOPY [J].

PETERSSON, LG ;

KARLSSON, SE .

PHYSICA SCRIPTA, 1977, 16 (5-6) :425-431

[9] PHOTOEMISSION-STUDIES OF THE LOW-TEMPERATURE REACTION OF METALS AND OXYGEN [J].

QIU, SL ;

LIN, CL ;

CHEN, J ;

STRONGIN, M .

PHYSICAL REVIEW B, 1990, 41 (11) :7467-7473

[10] IDENTIFICATION OF A SUPEROXIDE IN SUPERCONDUCTING LA2CUO4+DELTA BY X-RAY PHOTOELECTRON-SPECTROSCOPY [J].

ROGERS, JW ;

SHINN, ND ;

SCHIRBER, JE ;

VENTURINI, EL ;

GINLEY, DS ;

MOROSIN, B .

PHYSICAL REVIEW B, 1988, 38 (07) :5021-5024

← 1 2 →