Response of P(VDF-TrFE) sensor to force and temperature

Stuart Hannah, Deepak Uttamchandani, Helena Gleskova, Saleem Khan, Ravinder Dahiya

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

2 Citations (Scopus)
184 Downloads (Pure)

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.
Original languageEnglish
Title of host publication2015 11th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME)
Place of PublicationPiscataway, NJ.
PublisherIEEE
Number of pages4
ISBN (Print)9781479982295
DOIs
Publication statusPublished - 10 Sep 2015
EventIEEE PRIME 2015 - University of Glasgow, Glasgow, United Kingdom
Duration: 29 Jun 20152 Jul 2015

Conference

ConferenceIEEE PRIME 2015
CountryUnited Kingdom
CityGlasgow
Period29/06/152/07/15

Keywords

  • P(VDF-TrFE)
  • capacitance
  • temperature response
  • pressure response

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