Effect of Annealing Time Process on the pH Sensitivity of Spin-coated TiO2/ ZnO Bilayer Film

作者: R A Rahman , M A Zulkefle , K A Yusof , W F H Abdullah , M Rusop

DOI: 10.1088/1757-899X/99/1/012019

关键词: Titanium dioxideThin filmIndium tin oxideMaterials scienceSpin coatingBuffer solutionBilayerAnalytical chemistryZincAnnealing (metallurgy)

摘要: This paper presents an investigation on titanium dioxide (TiO2) and zinc oxide (ZnO) bilayer film, which is used as sensing membrane for extended-gate field effect transistor (EGFET) pH application. TiO2/ZnO thin films were deposited using sol-gel spin coating method indium tin (ITO) substrates. After the deposition, annealed at constant temperatures 400 °C 15, 30, 40 60 minutes. The sensitivity of TiO2 film towards buffer solution was measured by dipping in pH4, pH7 pH10 solution. By varying annealing time, we found that 400°C 15 minutes gave highest compared to other conditions, with value 64.87 mV/pH.

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