%0 Journal Article %J Journal of Nanoscience and Nanotechnology %D 2014 %T Chitosan and chitosan-co-poly(epsilon-caprolactone) grafted multiwalled carbon nanotube transducers for vapor sensing %A Rana, Vijay Kumar %A Akhtar, Shamim %A Chatterjee, Sudipta %A Mishra, Satyendra %A Singh, Raj Pal %A Ha, Chang-Sik %K Biocompatibility %K Chitosan %K MWCNTs %K Poly(epsilon-caprolactone) %K Vapour Sensing %X

Vapor sensitive transducer films consisting of chitosan grafted (CNT-CS) and chitosan-co-polycaprolactone grafted (CNT-CS-PCL) multiwalled carbon nanotubes were prepared using a spray layer-by-layer technique. The synthesized materials (CNT-CS and CNT-CS-PCL) were characterized by Fourier transform infrared spectroscopy, C-13 CP/MAS solid state nuclear magnetic resonance spectroscopy and thermogravimetric analysis. Both CNT-CS and CNT-CS-PCL transducers were analyzed for the response of volatile organic compounds and toluene vapors. The ranking of the relative resistance (A(r)) for both chitosan based transducers were as follows: toluene < chloroform < ethanol < methanol. The CNT transducer (CNT-CS) was correlated selectively with an exponential law to the inverse of Flory-Huggins interaction parameters, chi(12). Dosing the films on the interdigitated electrodes with methanol, ethanol, chloroform and toluene vapors increased the film resistance of CNT-CS but decreased the resistance of CNT-CS-PCL compared to that of the reported transducers.

%B Journal of Nanoscience and Nanotechnology %I AMER SCIENTIFIC PUBLISHERS %C 26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA %V 14 %P 2425-2435 %8 MAR %G eng %N 3 %9 Article %3

Foreign

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%R 10.1166/jnn.2014.8498