TUNNELING PROBE MANIPULATION OF INDIVIDUAL RHODIUM NANOPARTICLES SUPPORTED ON TIO2

被引：14
|
作者：
POIRIER, GE [1 ]
HANCE, BK [1 ]
WHITE, JM [1 ]
机构：
[1] UNIV TEXAS,DEPT CHEM & BIOCHEM,AUSTIN,TX 78712
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 24期
关键词：
D O I：
10.1021/j100126a027
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：
Active metals finely dispersed on oxide supports are useful in a broad class of applications. We have used scanning tunneling microscopy (STM) to characterize and to manipulate 30-50-angstrom rhodium particles grown on TiO2(001) rutile. Tunneling barrier height values of almost-equal-to 5 eV (close to the mean tip-sample work function) indicated a good vacuum tunneling gap. The tunneling probe was used to manipulate individual nanoparticles via intimate tip-sample point contacts. The results are consistent with cohesive/adhesive tip-particle interactions. This study indicates that supported catalyst and sensor research can be done on a particle-by-particle basis.
引用
收藏
页码：6500 / 6503
页数：4
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