Explosive vapour sensor using poly-(3-hexylthiophene) and Cu(II)tetraphenyl porphyrin composite based organic field effect transistor

Dudhe, Ravishankar S. ; Tiwari, S. P. ; Raval, Harshil N. ; Khaderbad, Mrunal A. ; Singh, Rahul ; Sinha, Jasmine ; Yedukondalu, M. ; Ravikanth, M. ; Kuma, Anil ; Rao, V. Ramgopal (2008) Explosive vapour sensor using poly-(3-hexylthiophene) and Cu(II)tetraphenyl porphyrin composite based organic field effect transistor Applied Physics Letters, 93 (26). Article ID 263306. ISSN 0003-6951

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Official URL: http://aip.scitation.org/doi/abs/10.1063/1.3049130...

Related URL: http://dx.doi.org/10.1063/1.3049130

Abstract

Organic field effect transistors based on poly(3-hexylthiophene) and CuII tetraphenylporphyrin composite were investigated as sensors for detection of vapors of nitrobased explosive compounds, viz. 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX), 2,4,6-trinitrotoluene (TNT), and dinitrobenzene, which are also strong oxidizing agents. Significant changes, suitable for sensor response, were observed in transistor “on” current (Ion) and conductance (S)after exposure. A similar device response was, however, not observed for oxidizing agents such as benzoquinone and benzophenone. The Fourier transform infrared spectrometry experiments supported the results, where exposure to RDX and TNT vapors resulted in a significant shift in IR peaks.

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