Solution-based fabrication of carbon nanotube gas sensor by using dielectrophoresis and spin-columnchromatography

Hideaki Watanabe, Hiroki Komure, Michihiko Nakano, Junya Suehiroa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Single-walled carbon nanotubes (SWCNTs) gas sensor has attracted a great deal of attention because of their remarkable properties. The sensor response is attribute to the semiconducting CNT whose electronic properties depend on its chirality. The authors have previously found that the sensor response increased by using separated semiconducting SWCNTs from a mixture with metallic one. Since the electronic structure (metallic or semiconducting) of CNTs is governed by their chirality, a chirality-selective fabrication of CNT gas sensor is essential to improve their performance. In this study, we proposed chirality-based separation of semiconducting SWCNTs by using spin-column chromatography. Pristine CNT suspension was separated into three fractions that had different chiralities of semiconducting SWCNTs. Separated semiconducting CNTs of each fraction were used for fabrication of three CNT gas sensors by dielectrophoresis. Comparison of these sensor responses to NO2 revealed that sensor response depended on the chirality.

Original languageEnglish
Title of host publicationMaterials Science and Chemical Engineering
Pages915-920
Number of pages6
DOIs
Publication statusPublished - 2013
Event2013 International Conference on Materials Science and Chemical Engineering, MSCE 2013 - , Singapore
Duration: Feb 20 2013Feb 21 2013

Publication series

NameAdvanced Materials Research
Volume699
ISSN (Print)1022-6680

Other

Other2013 International Conference on Materials Science and Chemical Engineering, MSCE 2013
CountrySingapore
Period2/20/132/21/13

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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