SCANNING TUNNELING MICROSCOPY AND TRANSMISSION ELECTRON-MICROSCOPY STUDIES OF AU AND PD CLUSTERS GROWN ON A CLEAN GRAPHITE SURFACE

被引：46

作者：

HUMBERT, A ^{[1
]}

DAYEZ, M ^{[1
]}

SANGAY, S ^{[1
]}

CHAPON, C ^{[1
]}

HENRY, CR ^{[1
]}

机构：

[1] CNRS,CTR RECH MECAN CROISSANCE CRISTALLINE,F-13288 MARSEILLE 9,FRANCE

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS | 1990年 / 8卷 / 01期

关键词：

D O I：

10.1116/1.577094

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Scanning tunneling microscopy (STM) has been used to image gold and palladium clusters deposited under ultrahigh vacuum (UHV) conditions on clean cleaved surfaces of natural graphite single crystals. Extensive transmission electron microscopy (TEM) studies were performed to determine the growth conditions. Moreover each sample was checked by ex situ TEM after each in situ STM study. The overall shape of the largest isolated clusters imaged by STM (10Q-200 A) is consistent with TEM observations: triangular or hexagonal outlines and clusters sitting along surface steps are elongated by coalescence. STM also reveals that they have a height versus diameter ratio about 0.1. Smallest clusters (10–20 A) are imaged with atomic resolution simultaneously with the graphite lattice. They are close packed and 2–3 atomic layers high. On occasion, two-dimensional Pd islands are observed. They have an hexagonal non-close-packed arrangement. © 1990, American Vacuum Society. All rights reserved.

引用

页码：311 / 313

页数：3

共 8 条

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