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Vol. 211, Issue 4, April 2017, pp. 16-22




Effect of Annealing and Operating Substrate Temperature on Methanol Gas Sensing Properties
of SnO2 Thin Films

1, * Priyanka Kakoty, 1 Manabendra Bhuyan and 2 Karen Das

1 Tezpur University, Tezpur, Assam, India
2 Assam Don Bosco University, Guwahati, Assam, India

* E-mail: priyankak@tezu.ernet.in


Received: 2 February2017 /Accepted: 31 March 2017 /Published: 30 April 2017

Digital Sensors and Sensor Sysstems


Abstract: SnO2 based sensing nano-material have been synthesized by simple chemical route using Stannic (IV) chloride-pentahydrate (SnCl4.5H2O) as precursor. The structural properties of the prepared SnO2 nano-particles annealed at different temperatures have been characterized by X-ray diffraction (XRD) analysis. The XRD patterns showed pure bulk SnO2 with a tetragonal rutile structure in the nano-powders. By increasing the annealing temperatures, the size of crystals were seen to increase, the diffraction peaks were found narrower and the intensity was higher. SnO2 films prepared by spin coating the prepared nano-material solution was tested at different temperatures for methanol vapour and it showed that the film prepared from SnO2 powder annealed at 500 0C shows the higher sensitivity to methanol vapour at 150 0C substrate temperature with significantly low response and recovery time.


Keywords: SnO2 sensing material, Annealing, Methanol, Gas sensor.


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