Reversible metal-insulator transition in ordered metal nanocrystal monolayers observed by impedance spectroscopy

被引：135

作者：

Markovich, G

Collier, CP

Heath, JR

机构：

[1] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.80.3807

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Low frequency impedance spectroscopy was applied on a Langmuir monolayer of alkylthiol passivated 35 Angstrom diameter silver quantum dots, as a function of interparticle separation distance. As interparticle spacing decreases below 30% of particle diameter, a reduction in interparticle charge tunneling time is observed. On further compression, the complex impedance of the films undergoes a transition from a parallel RC equivalent circuit to an inductive circuit. Optical reflectance changes in the films are consistent with the deduced metal-insulator transition.

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页码：3807 / 3810

页数：4

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