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Vapor Sensing Using Conjugated Molecule-Linked Au Nanoparticles in a Silica Matrix
Joint Authors
Washburn, Cody
Howell, Stephen W.
Price, B. Katherine
Tour, James M.
Simonson, R. Joseph
Wheeler, David R.
Whiting, Joshua
Fan, Hongyou
Dirk, Shawn M.
Source
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2008-12-30
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Engineering Sciences and Information Technology
Chemistry
Civil Engineering
Abstract EN
Cross-linked assemblies of nanoparticles are of great value as chemiresistor-type sensors.
Herein, we report a simple method to fabricate a chemiresistor-type sensor that minimizes the swelling transduction mechanism while optimizing the change in dielectric response.
Sensors prepared with this methodology showed enhanced chemoselectivity for phosphonates which are useful surrogates for chemical weapons.
Chemoselective sensors were fabricated using an aqueous solution of gold nanoparticles that were then cross-linked in the presence of the silica precursor, tetraethyl orthosilicate with the α-, ω-dithiolate (which is derived from the in situ deprotection of 1,4-di(Phenylethynyl-4′,4″-diacetylthio)-benzene (1) with wet triethylamine).
The cross-linked nanoparticles and silica matrix were drop coated onto interdigitated electrodes having 8 μm spacing.
Samples were exposed to a series of analytes including dimethyl methylphosphonate (DMMP), octane, and toluene.
A limit of detection was obtained for each analyte.
Sensors assembled in this fashion were more sensitive to dimethyl methylphosphonate than to octane by a factor of 1000.
American Psychological Association (APA)
Dirk, Shawn M.& Howell, Stephen W.& Price, B. Katherine& Fan, Hongyou& Washburn, Cody& Wheeler, David R.…[et al.]. 2008. Vapor Sensing Using Conjugated Molecule-Linked Au Nanoparticles in a Silica Matrix. Journal of Nanomaterials،Vol. 2009, no. 2009, pp.1-9.
https://search.emarefa.net/detail/BIM-474982
Modern Language Association (MLA)
Dirk, Shawn M.…[et al.]. Vapor Sensing Using Conjugated Molecule-Linked Au Nanoparticles in a Silica Matrix. Journal of Nanomaterials No. 2009 (2009), pp.1-9.
https://search.emarefa.net/detail/BIM-474982
American Medical Association (AMA)
Dirk, Shawn M.& Howell, Stephen W.& Price, B. Katherine& Fan, Hongyou& Washburn, Cody& Wheeler, David R.…[et al.]. Vapor Sensing Using Conjugated Molecule-Linked Au Nanoparticles in a Silica Matrix. Journal of Nanomaterials. 2008. Vol. 2009, no. 2009, pp.1-9.
https://search.emarefa.net/detail/BIM-474982
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-474982