Electrical transport and chemical sensing properties of individual conducting polymer nanowires

Yanyan Cao; Alexey E. Kovalev; Rui Xiao; Jaekyun Kim; Theresa S. Mayer; Thomas E. Mallouk

doi:10.1021/nl800940e

Electrical transport and chemical sensing properties of individual conducting polymer nanowires

Yanyan Cao, Alexey E. Kovalev, Rui Xiao, Jaekyun Kim, Theresa S. Mayer, Thomas E. Mallouk

Research output: Contribution to journal › Article › peer-review

84 Scopus citations

Abstract

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 (CIO ₄) 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.

Original language	English (US)
Pages (from-to)	4653-4658
Number of pages	6
Journal	Nano letters
Volume	8
Issue number	12
DOIs	https://doi.org/10.1021/nl800940e
State	Published - Dec 2008

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl800940e

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abstract = "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 (CIO 4) 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.",

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AU - Cao, Yanyan

AU - Kovalev, Alexey E.

AU - Xiao, Rui

AU - Kim, Jaekyun

AU - Mayer, Theresa S.

AU - Mallouk, Thomas E.

PY - 2008/12

Y1 - 2008/12

N2 - 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 (CIO 4) 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.

AB - 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 (CIO 4) 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.

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Electrical transport and chemical sensing properties of individual conducting polymer nanowires

Abstract

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