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Comparative Analysis of Ti, Ni, and Au Electrodes on Characteristics of TiO2 Nanofibers for Humidity Sensor Application
Pakistan Institute Engn and Appl Science, Pakistan .
Pakistan Institute Engn and Appl Science, Pakistan .
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Pakistan Institute Engn and Appl Science, Pakistan .
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2013 (English)In: Journal of Materials Science & Technology, ISSN 1005-0302, Vol. 29, no 5, 411-414 p.Article in journal (Refereed) Published
Abstract [en]

The effect of metal (Ti, Ni, and Au) electrodes on humidity sensing properties of electrospun TiO2 nanofibers was investigated in this work. The devices were fabricated by evaporating metal contacts on SiO2 layer thermally grown on silicon substrate. The separation between the electrodes was 90 mm for all sensors. The sensors were tested from 40% to 90% relative humidity (RH) by AC electrical characterization at room temperature. When sensors are switched between 40% and 90% RH, the corresponding response and recovery time are 3 s and 5 s for Ti-electrode sensor, 4 s and 7 s for Ni-electrode sensor, and 7 s and 13 s for Au-electrode sensor. The hysteresis was 3%, 5% and 15% for Ti-, Ni-, and Au-electrode sensor, respectively. The sensitivity of Ti, Ni, and Au-electrode sensors are 7.53 M Omega/% RH, 5.29 MU/% RH and 4.01 M Omega/% RH respectively at 100 Hz. Therefore Ti-electrode sensor is found to have linear response, fast response and recovery time and higher sensitivity as compared with those of Ni- and Au-electrode sensors. Comparison of humidity sensing properties of sensors with different electrode material may propose a compelling route for designing and optimizing humidity sensors.

Place, publisher, year, edition, pages
Elsevier , 2013. Vol. 29, no 5, 411-414 p.
Keyword [en]
Titanium dioxide, Nanofibers, Metal electrodes, Humidity sensor
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-95978DOI: 10.1016/j.jmst.2013.02.017ISI: 000321707100004OAI: diva2:641629

Funding Agencies|Higher Education Commission (HEC), Pakistan||

Available from: 2013-08-19 Created: 2013-08-12 Last updated: 2014-01-15

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Israr Qadir, MuhammadWillander, Magnus
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