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In-situ Chemically Polymerized PANi-SWNTs Composites: Characterizations and Gas Sensing Feature

Huyen, Duong Ngoc (2009) In-situ Chemically Polymerized PANi-SWNTs Composites: Characterizations and Gas Sensing Feature. In: Springer Proceedings in Physics. Springer Berlin Heidelberg.

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Official URL: http://springer.metapress.com/content/h17828463t23...

Abstract

An experiment has been made in order to study the impact of SWNTs in in-situ chemically polymerized PANi-SWNTs composites. It is found that the SWNTs surface plays a role of nucleation sites for PANi growth. The presence of SWNTs enhances the degree of polymerization and increase the conductivity (polaron or bipolaron lattice) of PANi. When radiated by a near-infrared laser (1064 nm) the dried materials emit strong fluorescent bands in mid-infrared region which are assumed to be the transitions from the π-orbital (highest occupied molecular orbital) to polaron and bipolaron lower levels. The bands are speculated to arise from charge transfer interactions between the PANi and SWNTs, which brings new polaron and bipolaron levels into the band gap of PANi. The PANi-SWNTs also exhibits an improvement in NH3 gas sensing characterization in comparison to neat SWNTs and PANi. The results are interpreted as a modification in the chemical and electronic structure of PANi.

Item Type:Book Section
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanostructured materials
ID Code:7216
Deposited By:CSMNT
Deposited On:30 Sep 2009 12:48
Last Modified:30 Sep 2009 12:48

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