Journal article
Sensitive detection of [H.sub.2]S using gold nanoparticle decorated single-walled carbon nanotubes
Analytical chemistry (Washington), Vol.82(1), p.250
01/01/2010
DOI: 10.1021/acg901871d
Abstract
Herein, we demonstrate that highly sensitive conductometric gas nanosensors for [H.sub.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.sub.2]S sensing performance was obtained with discrete gold nanodeposits rather than continuous nanowires. The gas nanosensors could sense [H.sub.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.sub.2]S. 10.1021/acg901871d
Details
- Title: Subtitle
- Sensitive detection of [H.sub.2]S using gold nanoparticle decorated single-walled carbon nanotubes
- Creators
- Syed MubeenTing ZhangNicha ChartuprayoonYoungwoo RheemAshok MulchandaniNosang V MyungMarc A Deshusses
- Resource Type
- Journal article
- Publication Details
- Analytical chemistry (Washington), Vol.82(1), p.250
- Publisher
- American Chemical Society
- DOI
- 10.1021/acg901871d
- ISSN
- 0003-2700
- eISSN
- 1520-6882
- Language
- English
- Date published
- 01/01/2010
- Description audience
- Academic
- Academic Unit
- Civil and Environmental Engineering; Chemical and Biochemical Engineering
- Record Identifier
- 9984209500002771
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