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Preparation of TiO2 Film on Al by Sol–Gel Chemical Wet Dry Technique for Electrochemical Bio-Sensing Applications

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TiO2 film on Al substrate and electrode has been synthesized by sol–gel and modified chemical wet and dry (CWD) technique. The formation of the polycrystalline TiO2 on Al substrate has been confirmed by X-ray diffraction (XRD) analysis. The XRD analysis clearly indicates that some percentage of Al diffuses into the TiO2 matrix at its interface region. The film is found to ben n-type from hot probe study. I–V characteristic of the sample shows that the contact is Ohmic and it can be used as a bio-sensor at low potential value. The performance and response to various concentrations of KOH solution and pH level were experimentally studied by prepared TiO2 coated Al working electrode where as Ag as a reference electrode. The time response of the electrode was also studied and it was found that this electrode can work for longer period without degrading its sensitivity. So from this analysis it can be found that TiO2 coated with Al electrode can be used to sense potassium (K+) from electrolyte solution.
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Keywords: CHEMICAL WET AND DRY (CWD) TECHNIQUE; POTASSIUM (K+) SENSOR; X-RAY DIFFRACTION (XRD) ANALYSIS

Document Type: Research Article

Publication date: February 1, 2016

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