POTASSIUM ADSORPTION ON TIO2(100)

被引：43

作者：

CASANOVA, R

PRABHAKARAN, K

THORNTON, G

机构：

[1] UNIV LOS ANDES,FAC CIENCIAS,DEPT FIS,FIS SUPERFICIES LAB,MERIDA,VENEZUELA

[2] UNIV MANCHESTER,DEPT CHEM,MANCHESTER M13 9PL,LANCS,ENGLAND

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1991年 / 3卷

关键词：

D O I：

10.1088/0953-8984/3/S/014

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Potassium adsorption on TiO2(100) has been studied with low energy electron diffraction, Auger electron spectroscopy and photoemission. Potassium progressively lowers the work-function of TiO2(100) with increasing coverage to a limit of 2.2 +/- 0.1 eV. A clear work-function minimum is not observed, as found for other semiconductor surfaces. The work-function decrease is accompanied by a downward band-bending, limiting at 0.75 +/- 0.05 eV. This arises from the population of band-gap states following charge transfer from K to the substrate. At half-monolayer coverage an ordered c(2 x 2) overlayer is formed.

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页码：S91 / S95

页数：5

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