On the Electric Conductivity of Highly Ordered Monolayers of Monodisperse Metal Nanoparticles

被引：35

作者：

Greshnykh, Denis ^{[1
]}

Froemsdorf, Andreas ^{[1
]}

Weller, Horst ^{[1
]}

Klinke, Christian ^{[1
]}

机构：

[1] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

来源：

NANO LETTERS | 2009年 / 9卷 / 01期

关键词：

CHARGE-TRANSPORT; GOLD; ARRAYS; ENERGY; FILMS; SIZE;

D O I：

10.1021/nl803520r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Monolayers of colloidally synthesized cobalt-platinum nanoparticles of different diameters characterized by transmission electron microscopy were deposited on structured silicon oxide substrates and characterized by scanning electron microscopy, grazing incidence X-ray scattering, and electric transport measurements. The highly ordered nanoparticle films show a thermally activated electron hopping between spatially adjacent particles at room temperature and Coulomb blockade at low temperatures. We present a novel approach to experimentally determine the particles charging energies giving values of 6.7-25.4 meV dependent on the particles size and independent of the interparticle distance. These observations are supported by finite element method calculations showing the self-capacitance to be the determining value which only depends on the permittivity constant of the surrounding space and the particles radius.

引用

页码：473 / 478

页数：6

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