Electrical and gas sensing properties of polyaniline functionalized single-walled carbon nanotubes

Jae-Hong Lim; Nopparat Phiboolsirichit; Syed Mubeen; Marc A Deshusses; Ashok Mulchandani; Nosang V Myung

doi:10.1088/0957-4484/21/7/075502

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Electrical and gas sensing properties of polyaniline functionalized single-walled carbon nanotubes

Journal article

Peer reviewed

Electrical and gas sensing properties of polyaniline functionalized single-walled carbon nanotubes

Jae-Hong Lim, Nopparat Phiboolsirichit, Syed Mubeen, Marc A Deshusses, Ashok Mulchandani and Nosang V Myung

Nanotechnology, Vol.21(7), pp.75502-075502

02/19/2010

DOI: 10.1088/0957-4484/21/7/075502

PMID: 20081292

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Abstract

Electrical and gas sensing properties of single-walled carbon nanotube networks functionalized with polyaniline (PANI-SWNTs) were systematically investigated to understand the gas sensing mechanisms and optimize sensing performance. The temperature-dependent electrical resistance and field-effect transistor (FET) transfer characteristics indicated that the electrical properties of PANI-SWNTs are dominated by the PANI coating. The FET transfer characteristics of PANI-SWNTs exposed to different NH(3) concentrations indicated that the dominant sensing mechanism is the deprotonation of PANI by NH(3). Sensing experiments with different gas analytes revealed that PANI-SWNTs responded positively to NH(3), and negatively to NO(2) and H(2)S with sensitivities of 5.8% per ppm(v) of NH(3), 1.9% per ppm(v) of NO(2), and 3.6% per ppm(v) of H(2)S. The lower detection limits were 50, 500, and 500 ppb for NH(3), NO(2), and H(2)S, respectively.

Ammonia - analysis

Aniline Compounds - chemistry

Electric Impedance

Environmental Monitoring - methods

Gases - analysis

Microscopy, Atomic Force

Nanotubes, Carbon - chemistry

Temperature

Details

Title: Subtitle: Electrical and gas sensing properties of polyaniline functionalized single-walled carbon nanotubes
Creators: Jae-Hong Lim - University of California, Riverside
Nopparat Phiboolsirichit - University of California, Riverside
Syed Mubeen - University of California, Riverside
Marc A Deshusses - University of California, Riverside
Ashok Mulchandani - University of California, Riverside
Nosang V Myung - University of California, Riverside
Resource Type: Journal article
Publication Details: Nanotechnology, Vol.21(7), pp.75502-075502
DOI: 10.1088/0957-4484/21/7/075502
PMID: 20081292
ISSN: 0957-4484
eISSN: 1361-6528
Grant note: U01 ES016026 / NIEHS NIH HHS
Language: English
Date published: 02/19/2010
Academic Unit: Civil and Environmental Engineering; Chemical and Biochemical Engineering
Record Identifier: 9984197068902771

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