Imaging and tunneling spectroscopy of gold nanocrystals and nanocrystal arrays

被引:48
作者
Bigioni, TP
Harrell, LE
Cullen, WG
Guthrie, DE
Whetten, RL
First, PN [1 ]
机构
[1] Georgia Inst Technol, Sch Chem, Atlanta, GA 30332 USA
[2] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
[3] Georgia Inst Technol, Ctr Microelect Res, Atlanta, GA 30332 USA
[4] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA
关键词
D O I
10.1007/s100530050319
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Scanning tunneling microscopy (STM) and spectroscopy (STS) have been used to determine the structural and electronic properties of thiol-passivated 29000 amu gold nanocrystals, both individually and in spontaneously formed quasi-two-dimensional arrays. Experiments were performed at temperatures of 300 K, 77 K, and 8 K. Even at room temperature, tunneling through these 1.7 nm nanocrystals is shown to give rise to a Coulomb blockade. At cryogenic temperatures, the spectroscopy of the nanocrystals in arrays and in isolation shows an incremental charging effect (the Coulomb staircase) and evidence is found for quantization of the electronic states.
引用
收藏
页码:355 / 364
页数:10
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