CSIR Central

gamma - Al(2)O(3)-Coated Porous Silicon for Trace Moisture Detection

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata

View Archive Info
Field Value
Title gamma - Al(2)O(3)-Coated Porous Silicon for Trace Moisture Detection
Creator Islam, Tarikul
Saha, Debdulal
Hasan, Prince M Z
Islam, Sheikh Safiul
Subject Electronics
Description A simple moisture sensor working at room temperature has been fabricated using porous silicon (PS) coated with porous gamma-aluminium oxide (gamma - Al(2)O(3)). Porous silicon was formed by electrochemical anodization of p-type silicon. Thereafter, a porous layer of the PS was dip coated with gamma - Al(2)O(3) film. The gamma - Al(2)O(3) coating solution was made by a simple sol-gel method. The coated structure was sintered at 500 degrees C for 30 m to form a nano porous layer of metal oxide on the porous silicon. Sintering the gamma - Al(2)O(3)-coated PS sample improves the stability of the sensor. Two different sensors with membrane-type metal contact have been fabricated by varying electrochemical parameters of PS. The sensors were tested to detect low moisture content in the N(2) gaseous atmosphere in the range of 25 to 200 mu l. Results show that suitable pore morphology of the hybrid structure will enable one to obtain characteristics of a sensor comparable to the commercial porous alumina moisture sensor. It was further observed that the sensor output is highly reproducible and has negligible hysteresis.
Date 2011-04
Type Article
Format application/pdf
Identifier http://cgcri.csircentral.net/267/1/IEEE_Sensor_J_11%282011%29882-887.pdf
Islam, Tarikul and Saha, Debdulal and Hasan, Prince M Z and Islam, Sheikh Safiul (2011) gamma - Al(2)O(3)-Coated Porous Silicon for Trace Moisture Detection. IEEE Sensors Journal, 11 (4). pp. 882-887. ISSN 1530-437X
Relation http://cgcri.csircentral.net/267/