Carbon nanotube/polythiophene chemiresistive sensors for chemical warfare agents.

TitleCarbon nanotube/polythiophene chemiresistive sensors for chemical warfare agents.
Publication TypeJournal Article
Year of Publication2008
AuthorsWang, F, Gu, H, Swager, TM
JournalJournal of the American Chemical Society
Date Publishedapr
KeywordsBiosensing 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

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.