Sensitive Detection of H2S Using Gold Nanoparticle Decorated Single-Walled Carbon Nanotubes

Syed Mubeen; TING Zhang; Nicha Chartuprayoon; Youngwoo Rheem; Ashok Mulchandani; Nosang V Myung; Marc A Deshusses

doi:10.1021/ac901871d

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Sensitive Detection of H2S Using Gold Nanoparticle Decorated Single-Walled Carbon Nanotubes

Journal article

Peer reviewed

Sensitive Detection of H2S Using Gold Nanoparticle Decorated Single-Walled Carbon Nanotubes

Syed Mubeen, TING Zhang, Nicha Chartuprayoon, Youngwoo Rheem, Ashok Mulchandani, Nosang V Myung and Marc A Deshusses

Analytical chemistry (Washington), Vol.82(1), pp.250-257

2010

DOI: 10.1021/ac901871d

PMID: 19968250

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http://hdl.handle.net/10161/3998View

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Abstract

Herein, we demonstrate that highly sensitive conductometric gas nanosensors for H(2)S can be synthesized by electrodepositing gold nanoparticles on single-walled carbon nanotube (SWNT) networks. Adjusting the electrodeposition conditions allowed for tuning of the size and number of gold nanoparticles deposited. The best H(2)S sensing performance was obtained with discrete gold nanodeposits rather than continuous nanowires. The gas nanosensors could sense H(2)S in air at room temperature with a 3 ppb limit of detection. The sensors were reversible, and increasing the bias voltage reduced the sensor recovery time, probably by local Joule heating. The sensing mechanism is believed to be based on the modulation of the conduction path across the nanotubes emanating from the modulation of electron exchange between the gold and carbon nanotube defect sites when exposed to H(2)S.

Analytical Chemistry

Chemistry

Electrochemical methods

Exact sciences and technology

General, instrumentation

Details

Title: Subtitle: Sensitive Detection of H2S Using Gold Nanoparticle Decorated Single-Walled Carbon Nanotubes
Creators: Syed Mubeen - University of California, Riverside
TING Zhang - University of California, Riverside
Nicha Chartuprayoon - University of California, Riverside
Youngwoo Rheem - University of California, Riverside
Ashok Mulchandani - University of California, Riverside
Nosang V Myung - University of California, Riverside
Marc A Deshusses - University of California, Riverside
Resource Type: Journal article
Publication Details: Analytical chemistry (Washington), Vol.82(1), pp.250-257
DOI: 10.1021/ac901871d
PMID: 19968250
NLM abbreviation: Anal Chem
ISSN: 0003-2700
eISSN: 1520-6882
Publisher: American Chemical Society
Language: English
Date published: 2010
Academic Unit: Civil and Environmental Engineering; Chemical and Biochemical Engineering
Record Identifier: 9984197282202771

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