DETERMINATION OF THE WORK-FUNCTIONS OF PT(111) AND IR(111) BEYOND 1100 K SURFACE-TEMPERATURE

被引：38

作者：

KAACK, M

FICK, D

机构：

[1] UNIV MARBURG,FACHBEREICH PHYS,D-35032 MARBURG,GERMANY

[2] UNIV MARBURG,WISSENSCH ZENTRUM MAT WISSENSCH,D-35032 MARBURG,GERMANY

来源：

SURFACE SCIENCE | 1995年 / 342卷 / 1-3期

关键词：

ADATOMS; ALKALI METALS; IRIDIUM; LOW INDEX SINGLE CRYSTAL SURFACES; PLATINUM; RETARDING ELECTRIC FIELD; THERMAL DESORPTION; WORK FUNCTION MEASUREMENTS;

D O I：

10.1016/0039-6028(95)00758-X

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 work functions of Ir(111) and Pt(111) were determined at surface temperatures above 1100 K with three different methods: surface ionization, atomic desorption and mean residence time measurements of Li. The coverage of the surface with Li was always below 10(-3) of a monolayer. All these methods directly or indirectly use the Langmuir-Saha equation. The mean values of the work functions obtained are 5.70 +/- 0.02 eV for Ir(111) and 5.77 +/- 0.02 eV for Pt(111) at surface temperatures of about 1100 to 1400 K.

引用

页码：111 / 118

页数：8

共 23 条

[1]

Landolt-Börnstein, Numerical Data and Functional Relationships in Science and Technology New Series, Group III, Vol. 24, Physics of Solid Surfaces, Subvol. b, Electronic and Vibrational Properties, (1994)

[2]

Holzl, Schulte, Work Functions of Metals, Solid Surface Physics, 85, (1979)

[3]

Kiskinova, Pirug, Bonzel, Surf. Sci., 133, (1983)

[4]

Salmeron, Ferrer, Jazzar, Somorjai, Photoelectron-spectroscopy study of the electronic structure of Au and Ag overlayers on Pt(100), Pt(111), and Pt(997) surfaces, Physical Review B, 28, (1983)

[5]

Derry, Zhang, Phys. Rev. B, 39, (1989)

[6]

Alrot, Ehrhardt, Barnard, A characterization of heterogeneous Pt surfaces by work function measurements and photoemission of adsorbed xenon, Surface Science, 208, (1989)

[7]

Cassuto, Mane, Hugenschmidt, Dolle, Jupille, Surf. Sci., 237, (1990)

[8]

Bickert, Widdra, Fick, Differences in the adsorption of Li and Na on clean and oxygen covered hot W-surfaces, Surface Science, 251-252, (1991)

[9]

Riehl-Chudoba, Fick, Adsorption of single lithium atoms on metal surfaces, Surface Science, 251-252, (1991)

[10]

Kaack, Fick, Phys. Rev. B, 51, (1995)

← 1 2 3 →