Surface structures of S on Pd(111)

被引：41

作者：

Speller, S

Rauch, T

Bömermann, J

Borrmann, P

Heiland, W

机构：

[1] Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany

[2] Carl von Ossietzky Univ Oldenburg, Fachbereich Phys, D-26111 Oldenburg, Germany

来源：

SURFACE SCIENCE | 1999年 / 441卷 / 01期

关键词：

low energy electron diffraction (LEED); chemisorption; palladium; scanning tunneling microscopy; sulfur; surface segregation; surface structure; morphology; roughness and topography; X-ray photoelectron spectroscopy;

D O I：

10.1016/S0039-6028(99)00808-0

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：

S is adsorbed on Pd(111) from the gas phase using H2S as 'carrier' gas. After adsorption at room temperature a (root 3 x root 3)R30 degrees LEED pattern is observed. Using STM coexisting (root 3 x root 3)R30 degrees, (root 7 x root 7)R19.1 degrees (2 x 2) stripes, (2 x 2) triangles and disordered S structures are found. Annealing favors the formation of (root 7 x root 7)R19.1 degrees areas on the surface. The structures, produced by H2S adsorption are compared with S structures produced by segregation. A detailed model for the (root 7 x root 7)R19.1 degrees is developed on the basis of AES and XPS data and FLAPW calculations. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：107 / 116

页数：10

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