Carbon nanotube/polythiophene chemiresistive sensors for chemical warfare agents.
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.
Wang
Fei
F
Department of Materials Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Gu
Hongwei
H
Swager
Timothy M
TM
D015374:Biosensing Techniques / Q000379:methods*; D002619:Chemical Warfare Agents / Q000032:analysis*; D006860:Hydrogen Bonding; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013876:Thiophenes / Q000737:chemistry*
D002619:Chemical Warfare Agents; D037742:Nanotubes, Carbon; D009943:Organophosphorus Compounds; D011108:Polymers; D013876:Thiophenes; C031116:dimethyl methylphosphonate; C066730:polythiophene