Sensitive Detection of Elemental Mercury Vapor by Gold Nanoparticle Decorated Carbon Nanotube Sensors.
Published
Journal Article
Low-cost, low power consumption gas sensors that can detect or quantify various gas analytes are of increasing interest for various applications ranging from mobile health, to environmental exposure assessment and homeland security. In particular miniature gas sensors based on nanomaterials that can be manufactured in the form of sensor arrays present great potential for the development of portable monitoring devices. In this study, we demonstrate that a chemiresistive nanosensor comprised of single walled carbon nanotubes decorated with gold nanoparticles has impressive sensitivity to elemental mercury (Hg) gas concentrations, with a lower detection limit as low as 2 ppb(v). Furthermore, this nanosensor was found to regenerate, though slowly, without any additional recovery steps. Finally, the mercury vapor sensing mechanism allowed for direct investigations into the origin of Surface Enhanced Raman Scattering (SERS) in carbon nanotubes decorated with Au nanoparticles.
Full Text
Duke Authors
Cited Authors
- McNicholas, TP; Zhao, K; Yang, C; Hernandez, SC; Mulchandani, A; Myung, NV; Deshusses, MA
Published Date
- July 2011
Published In
Volume / Issue
- 115 / 28
Start / End Page
- 13927 - 13931
PubMed ID
- 21922036
Pubmed Central ID
- 21922036
Electronic International Standard Serial Number (EISSN)
- 1932-7455
International Standard Serial Number (ISSN)
- 1932-7447
Digital Object Identifier (DOI)
- 10.1021/jp203662w
Language
- eng