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Sensitive detection of H2S using gold nanoparticle decorated single-walled carbon nanotubes.

dc.contributor.author Mubeen, Syed
dc.contributor.author Zhang, Ting
dc.contributor.author Chartuprayoon, Nicha
dc.contributor.author Rheem, Youngwoo
dc.contributor.author Mulchandani, Ashok
dc.contributor.author Myung, Nosang V
dc.contributor.author Deshusses, Marc A
dc.coverage.spatial United States
dc.date.accessioned 2011-06-21T17:22:07Z
dc.date.issued 2010-01-01
dc.identifier https://www.ncbi.nlm.nih.gov/pubmed/19968250
dc.identifier.uri https://hdl.handle.net/10161/3998
dc.description.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.
dc.language eng
dc.language.iso en_US
dc.publisher American Chemical Society (ACS)
dc.relation.ispartof Anal Chem
dc.relation.isversionof 10.1021/ac901871d
dc.subject Gold
dc.subject Hydrogen Sulfide
dc.subject Metal Nanoparticles
dc.subject Nanotubes, Carbon
dc.subject Sensitivity and Specificity
dc.title Sensitive detection of H2S using gold nanoparticle decorated single-walled carbon nanotubes.
dc.title.alternative
dc.type Journal article
duke.contributor.id Deshusses, Marc A|0486339
dc.description.version Version of Record
duke.date.pubdate 2010-1-1
duke.description.issue 1
duke.description.volume 82
dc.relation.journal Analytical Chemistry
pubs.author-url https://www.ncbi.nlm.nih.gov/pubmed/19968250
pubs.begin-page 250
pubs.end-page 257
pubs.issue 1
pubs.organisational-group Civil and Environmental Engineering
pubs.organisational-group Duke
pubs.organisational-group Pratt School of Engineering
pubs.publication-status Published
pubs.volume 82
dc.identifier.eissn 1520-6882


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