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CHEMICAL-ANALYSIS OF PTXNI1-X ALLOY SINGLE-CRYSTAL SURFACES BY SCANNING-TUNNELING-MICROSCOPY

被引：4
作者：
BIEDERMANN, A
SCHMID, M
VARGA, P
机构：
[1] Institut für Allgemeine Physik, Technische Universität Wien, Wien, A-1040
来源：
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1994年 / 349卷 / 1-3期
关键词：
D O I：
10.1007/BF00323272
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Two STM investigations are presented, in which irregular tip conditions enable direct access to chemical and structural information of a surface on an atomic scale, otherwise invisible for the STM. They allow a study of surface ordering of a Pt25Ni75(111) crystal by chemical contrast between the alloy components, and a study of carbon superstructures on a Pt10Ni90(100) surface by simultaneous imaging of substrate lattice and carbon atoms. All these images were obtained at very low tunnelling resistances and thus at small tip-sample distances. A chemical interaction between the probably adsorbate covered tip and the sample is proposed to explain these images.
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收藏
页码：201 / 203
页数：3
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