Room temperature ppb level Cl2 sensing using sulphonated copper phthalocyanine films

Arvind Kumar; A Singh; A K Debnath; S Samanta; D K Aswal; S K Gupta; J V Yakhmi

doi:10.1016/j.talanta.2010.07.026

Room temperature ppb level Cl2 sensing using sulphonated copper phthalocyanine films

Talanta. 2010 Sep 15;82(4):1485-9. doi: 10.1016/j.talanta.2010.07.026. Epub 2010 Jul 17.

Authors

Arvind Kumar¹, A Singh, A K Debnath, S Samanta, D K Aswal, S K Gupta, J V Yakhmi

Affiliation

¹ Thin Films and Devices Section, Technical Physics Division, Bhabha Atomic Research Center, Mumbai 400 085, India.

PMID: 20801360
DOI: 10.1016/j.talanta.2010.07.026

Abstract

We present room temperature chemiresistive gas sensing characteristics of drop casted sulphonated copper phthalocyanine (CuTsPc) films. It has been demonstrated that these films are highly selective to Cl(2) and the sensitivity in the 5-2000 ppb range varies linearly between 65 and 625%. However, for concentrations >or=2000 ppb, the response becomes irreversible, which is found to be due to the chemical bond formation between Cl(2) and SO(3)Na group of CuTsPc films. The X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) data confirms the oxidation of SO(3)Na group by Cl(2) gas.