Effect of chain length on the tunneling conductance of gold quantum dots at room temperature

被引：12

作者：

Chaki, NK ^{[1
]}

Gopakumar, TG ^{[1
]}

Maddanimath, T ^{[1
]}

Aslam, M ^{[1
]}

Vijayamohanan, K ^{[1
]}

机构：

[1] Natl Chem Lab, Pune 411008, Maharashtra, India

来源：

JOURNAL OF APPLIED PHYSICS | 2003年 / 94卷 / 05期

关键词：

D O I：

10.1063/1.1600521

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Understanding the electronic structure of nanometer-sized metal particles which bridge the gap between the molecules and bulk materials is important due to the fabrication of many nanodevices, like single-electron transistors and molecular switches. Using a simple core-shell model, here, we investigate the variation of electrostatic charging properties of metallic nanoclusters with the chain length of the passivating molecule and cluster core size. The estimation of capacitance (C-c) and charging energy (E-c) as 2piepsilon(0)epsilon(r)R(c)/(1+2r/R-c) and e(2)(1+2r/R-c)/4piepsilon(0)epsilon(r)R(c), respectively, as a function of the core size as well as the intercluster spacing, reveals that longer chains (8 to 10 methylene units) limit the electron transport beyond usefulness. (C) 2003 American Institute of Physics.

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页码：3663 / 3665

页数：3

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