Response of P(VDF-TrFE) Sensor to Force and Temperature

Hannah, S., Uttamchandani, D., Gleskova, H., Khan, S. and Dahiya, R. (2015) Response of P(VDF-TrFE) Sensor to Force and Temperature. In: 11th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME), Glasgow, Scotland, 29 Jun - 02 Jul 2015, pp. 369-372. ISBN 9781479982295 (doi:10.1109/PRIME.2015.7251412)

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Abstract

Responses of a tactile sensor to force (0 to 9 N) and temperature (15 to 47°C) are investigated. The sensor is based on ferroelectric polyvinylidene fluoride - trifluoroethylene (P(VDF-TrFE)) copolymer. The 2.5-μm-thick copolymer layer was sandwiched between aluminum and gold electrodes and the active sensing area was 25 mm2. The response of the sensor was measured in a form of capacitance recorded at 2 kHz. The capacitance was measured in a steady-state condition, i.e. after the force and temperature have stabilized. We have found that the sensor's sensitivity to temperature is comparable to that of force, and even greatly exceeds the force sensitivity when dealing with forces larger than 3 N. This is because the response of the sensor to temperature is approximately linear, while the response to the applied force is logarithmic. Consequently, at the lower end of applied forces (<; 0.5 N), the sensitivity is 7.5 pF/N while the temperature sensitivity is about 7 pF/°C within the whole temperature range.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Dahiya, Professor Ravinder
Authors: Hannah, S., Uttamchandani, D., Gleskova, H., Khan, S., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
ISBN:9781479982295
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