Characterization of ZnO Films Based Sensors Prepared by Different Techniques

Abstract:

In the present research, zinc oxide (ZnO) films have been prepared by simple solution method and spray pyrolysis on different substrates (glass and sapphire) for different molar concentrations (0.2M & 0.25M). The films were subjected to different substrate temperatures (400 °C and 450 °C respectively. These were characterized for SEM and XRD and the average size of the crystallites were in range of 300 and 200nm for the films on Saphire and glass at higher substrate temperature. FTIR analysis has been carried out and optimization conditions were used in order to confirm the significant peaks and phase transformation. The films were subjected to ethanol gas for these substrates and corresponding electrical properties were carried out by two probe method and was found that the films for sapphire substrate prepared by spray pyrolysis method showed more conductance at higher temperatures than glass. Optical properties were also studied for these films and was found that films prepared by spray on sapphire shows less transmittance at higher substrate temperatures in comparison to the films on glass.

• Periodical: Applied Mechanics and Materials (Volume 772)
• Pages: 50-54
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.772.50
• Online since: July 2015
• Authors: Sonik Bhatia*, Neha Verma, Aman Mahajan, R.K. Bedi
• Keywords: Nanoparticles, Sensors, Solution Synthesis, Spray Pyrolysis

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