ULTRAHIGH-VACUUM SCANNING TUNNELING MICROSCOPY STUDIES OF PLATINUM ON GRAPHITE

被引：39

作者：

CLARK, GW

KESMODEL, LL

机构：

[1] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405

[2] INDIANA UNIV,MAT RES INST,BLOOMINGTON,IN 47405

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 1993年 / 11卷 / 02期

关键词：

D O I：

10.1116/1.586691

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The surface morphology of submonolayer coverages of platinum vapor deposited onto highly oriented pyrolytic graphite (HOPG) has been studied. With coverages of 5%-30% of a monolayer, we have observed both three-dimensional clusters and two-dimensional (2D) islands of Pt on the substrate. Our studies concentrated on the 2D islands of Pt, which exhibited several interesting features. Small islands exhibited epitaxial growth on the HOPG with markedly small Pt-Pt bond lengths, as well as occasional features of larger spacings. Similar larger structures on graphite islands and near graphite steps on the clean HOPG surface were observed. Results of scanning tunneling spectroscopy show that spectra on platinum deposits exhibit a broader character than those on clean graphite and show some structure consistent with bulk Pt.

引用

页码：131 / 136

页数：6

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