Humidity sensor; titanium oxide; sensing mechanism; optical fiber.
1Bhaskaracharya College of Applied Sciences, University of Delhi, Delhi 110075, India
2Swami Shradhanand College, University of Delhi, Delhi 110036, India
3Department of Science and Technology, Technology Bhavan, Delhi 110061, India
4Institute of Defense Scientists and Technologists, S. K. Mazumdar Road, Delhi110054, India
5Biosensors and Bioelectronics Centre, Institute of Physics, Chemistry and Biology, Linköping University, S-58183, Linköping, Sweden
Adv. Mater. Lett., 2012, Current Issue, 3 (5), pp 365-370
Publication Date (Web): Sep 16, 2012
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Thin films of titanium dioxide in anatase form have been prepared using isobutyl titanate as precursor. The resulting TiO2 was coated on an U-shaped pyrex glass rod to sense the humidity of a controlled humid environment using optical fiber approach. The humidity sensing characteristics and the sensing mechanism have been investigated by measuring the output power of the sensor at different humidity. The developed humidity sensor was responded in the humidity ranging from 10 to 95% of relative humidity and exhibited the sensitivity of 0.78, response time 36s and recovery time 73s.
Humidity sensor,titanium oxide, sensing mechanism, optical fiber.