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Surfactant assisted growth of nanostructured tin oxide films for gas sensing applications

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Abstract

Porous nanostructured SnO2 films have been prepared using an ultrasonic spray pyrolysis technique in conjunction with cationic, anionic and non ionic surfactants namely CTAB (Cetyl trimethyl ammonium bromide), SDS (sodium dodecyl sulphate) and PEG (polyethylene glycol) respectively. The effect of surfactants on the structural, electrical, optical and gas sensing properties of SnO2 films were investigated by using different techniques such as X-ray diffraction (XRD), Field emission scanning electroscope microscopy (FESEM), two probe technique and Photoluminiscence (PL) studies. The results reveal that the addition of surfactants in the precursor solutions leads to reduction in crystallite size with significant changes in porosity of SnO2 films. PL studies of the films show emissions in the visible region which exhibit changes in the intensities upon variation of surfactants in the precursor solutions. The prepared films were tested for their sensing behaviour towards chlorine and the results reveal that the films prepared in conjunction with cationic surfactant CTAB exhibits a sensing response of 53.5% towards 20 ppm chlorine at a low operating temperature of 150°C.

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Authors and Affiliations

  1. Material Science Laboratory, Department of Physics, Guru Nanak Dev University, Amritsar, 143005, India

    Kamalpreet Khun Khun, Aman Mahajan & R. K. Bedi

Authors
  1. Kamalpreet Khun Khun
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  2. Aman Mahajan
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  3. R. K. Bedi
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Correspondence to Aman Mahajan.

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Khun, K.K., Mahajan, A. & Bedi, R.K. Surfactant assisted growth of nanostructured tin oxide films for gas sensing applications. Electron. Mater. Lett. 7, 303–308 (2011). https://doi.org/10.1007/s13391-011-0140-9

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  • DOI: https://doi.org/10.1007/s13391-011-0140-9

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