@article { ISI:000331624700039, title = {Chitosan and chitosan-co-poly(epsilon-caprolactone) grafted multiwalled carbon nanotube transducers for vapor sensing}, journal = {Journal of Nanoscience and Nanotechnology}, volume = {14}, number = {3}, year = {2014}, month = {MAR}, pages = {2425-2435}, publisher = {AMER SCIENTIFIC PUBLISHERS}, type = {Article}, address = {26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA}, abstract = {
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.
}, keywords = {Biocompatibility, Chitosan, MWCNTs, Poly(epsilon-caprolactone), Vapour Sensing}, issn = {1533-4880}, doi = {10.1166/jnn.2014.8498}, author = {Rana, Vijay Kumar and Akhtar, Shamim and Chatterjee, Sudipta and Mishra, Satyendra and Singh, Raj Pal and Ha, Chang-Sik} }