Effect of Thermal Excitation on Intermolecular Charge Transfer Efficiency in Conducting Polyaniline

Published

August 1, 2004

Author(s)

Guofeng Li, M Josowicz, J Janata, Stephen Semancik

Abstract

A MEMS conductometric gas-sensing platform with temperature control has been adopted to probe temperature dependent phenomena in conducting polymers. This paper describes our recent observation of thermal effects on the intermolecular charge transfer efficiency in conducting polyaniline at both ends of the charge transfer either as a donor or as an acceptor, upon exposure to gaseous analytes. When polyaniline is serving as a donor, the thermal excitation of electrons in polyaniline facilitates the charge transfer. However, if polyaniline assumes the role as the acceptor, the charge transfer becomes less efficient at higher temperatures. Furthermore, a simplified band structure model is employed to elucidate such discriminative behavior.

Citation

Applied Physics Letters

Volume

85

Issue

No. 7

Pub Type

Journals

Keywords

charge transfer, organic semiconductor, plyaniline, thermal effect

Citation

Li, G. , Josowicz, M. , Janata, J. and Semancik, S. (2004), Effect of Thermal Excitation on Intermolecular Charge Transfer Efficiency in Conducting Polyaniline, Applied Physics Letters (Accessed July 1, 2025)