Electrical Transport and Chemical Sensing Properties of Individual Conducting Polymer Nanowires

被引：74

作者：

Cao, Yanyan ^{[2
]}

Kovalev, Alexey E. ^{[1
]}

Xiao, Rui ^{[2
]}

Kim, Jaekyun ^{[1
]}

Mayer, Theresa S. ^{[1
]}

Mallouk, Thomas E. ^{[2
]}

机构：

[1] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1021/nl800940e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electrical transport and chemical sensing properties of individual multisegmented Au-poly(3,4-ethylenedioxythiophene)(PEDOT)-Au nanowires have been investigated. Temperature dependent conductivity measurements show that different charge transport mechanisms influence these properties in two types of PEDOT nanowires. Charge transport in PEDOT/poly(4-styrenesulfonic acid) (PSS) nanowires is in the insulating regime of the metal-insulator transition and dominated by hopping, while PEDOT/perchlorate (CIO4) nanowires are slightly on the metallic side of the critical regime. The vapor sensing properties of individual nanowires to water and methanol reflect the fact that the two kinds of PEDOT nanowires operate in different transport regimes. Nanowires in the metallic transport regime show much greater sensitivity to vapor-phase analytes than those in which transport is dominated by hopping.

引用

页码：4653 / 4658

页数：6

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