ALKALI-METAL-TO-SUBSTRATE CHARGE-TRANSFER IN TIO2(100)C(2X2)K

被引：80

作者：

PRABHAKARAN, K ^{[1
]}

PURDIE, D ^{[1
]}

CASANOVA, R ^{[1
]}

MURYN, CA ^{[1
]}

HARDMAN, PJ ^{[1
]}

WINCOTT, PL ^{[1
]}

THORNTON, G ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.45.6969

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Resonance photoemission and surface-extended x-ray-absorption fine structure (SEXAFS) have been used to investigate the electron-donor properties of potassium adsorbed on rutile TiO2(100). Potassium K-edge SEXAFS from TiO2(100)c(2 x 2)K shows that K lies in a bridge site, bonding to two oxygen atoms with a K-O bond distance of 2.62 +/- 0.03 angstrom. Resonance photoemission data indicate that K adsorption is accompanied by charge transfer into Ti 3d band-gap states which are polaronic in nature. At 0.25 and 0.75 monolayer coverage about 1/4 of an electron is transferred into Ti 3d states for each adsorbed potassium atom.

引用

页码：6969 / 6972

页数：4

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