Saha, Debdulal and Das, Santanu and Sengupta, Kamalendu (2008) Development of commercial nanoporous trace moisture sensor following sol–gel thin film technique. Sensors and Actuators B: Chemical, 128 (2). pp. 383-387.
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A simple laboratory technique for the routine preparation of γ-alumina (Al2O3) thin films on gold electrodes coated on an α-alumina substrate (10 mm × 20 mm × 1 mm) is described here. Prepared thin films and porous electrodes are dried at 100 °C and sintered at 400–550 °C for 4 h to achieve the γ-Al2O3 phase. Further the temperature is shifted to 950 °C for 1.5 h for curing the electrodes. Microstructure of the films are analysed by means of atomic force microscopy (AFM) and scanning electron microscopy (SEM). The studies suggested that doubly coated γ-Al2O3 led to an increase in the surface roughness of the deposited film which provided a unique sensor sensitive to trace moisture on a ppm level by volume (ppmv).
|Uncontrolled Keywords:||Al-sec-butoxide; Transparent thin film; Sol–gel coating; Morphologic analysis; Electrical properties|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||03 Jun 2010 11:58|
|Last Modified:||08 Feb 2012 16:57|
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