A. Rushi, K. Datta, P. Ghosh
Apr 1, 2013
Citations
0
Influential Citations
23
Citations
Journal
Materials Letters
Abstract
Abstract Non-covalently functionalized SWNTs with iron tetraphenyl porphyrin (FeTPP) were employed for detection of benzene in a sensing window of 125 ppm at room temperature. Formation of the SWNTFeTPP complex was confirmed by morphological, electrical and field effect studies that revealed an electron donating nature of porphyrin. The SWNTFeTPP sensor showed an average sensitivity of 62% and excellent linearity for validated window of concentration. The typical response and recovery time of the sensor were recorded to be in the order of seconds. In comparison to the sensing behavior of SWNTTPP (tetraphenyl porphyrin) sensor, the SWNTFeTPP sensor exhibited a superior sensing. The central metal ion in case of FeTPP functionalized sensor is found to be instrumental in deciding the sensing behavior.