Carbon nanotube/polythiophene chemiresistive sensors for chemical warfare agents.
Title
Carbon nanotube/polythiophene chemiresistive sensors for chemical warfare agents.
Publication Type
Journal Article
Year of Publication
2008
Journal
Journal of the American Chemical Society
Volume
130
Pagination
5392–3
Date Published
apr
ISSN
1520-5126
Keywords
Biosensing Techniques, Biosensing Techniques: methods, Carbon, Carbon: chemistry, Chemical Warfare Agents, Chemical Warfare Agents: analysis, Hydrogen Bonding, Nanotubes, Organophosphorus Compounds, Organophosphorus Compounds: chemistry, Polymers, Polymers: chemistry, Reproducibility of Results, Sensitivity and Specificity, Thiophenes, Thiophenes: chemistry
Abstract
We report a chemiresistor that has been fabricated via simple spin-casting technique from stable CNT dispersion in hexafluoroisopropanol functionalized polythiophene. The sensor has shown high sensitivity and selectivity for a nerve reagent stimulant DMMP. A series of sensing studies, including field effect investigation, electrode passivation, and fluorescent measurement, indicate a combinative mechanism of charge transfer, introduction of scattering sites, and a configurational change of the polymer.