Fabrication of highly sensitive capacitive pressure sensors with electrospun polymer nanofibers
- Authors
- Kim, Yeongjun; Jang, Shin; Kang, Byung Ju; Oh, Je Hoon
- Issue Date
- Aug-2017
- Publisher
- AMER INST PHYSICS
- Keywords
- HUMAN-MACHINE INTERFACES; FORCE SENSOR; SKIN; ELECTRONICS; SYSTEM; RUBBER; FILM
- Citation
- APPLIED PHYSICS LETTERS, v.111, no.7, pp.1 - 4
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED PHYSICS LETTERS
- Volume
- 111
- Number
- 7
- Start Page
- 1
- End Page
- 4
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/9074
- DOI
- 10.1063/1.4998465
- ISSN
- 0003-6951
- Abstract
- Highly sensitive capacitive pressure sensors with poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) dielectric layers were prepared. The dielectric layers were directly produced by electrospinning P(VDF-TrFE) nanofibers for various spinning times. A longer spinning time enhanced the deformability of the electrospun P(VDF-TrFE) layers, resulting in higher sensitivity owing to larger changes in the deformation of the dielectric layer. One of the capacitive pressure sensors showed a high sensitivity of 2.81 kPa(-1) at a pressure <= 0.12 kPa, a good response time of 42 ms, and small hysteresis. The sensitivity of the sensor was five times higher than that of a typical capacitive pressure sensor. The fabricated pressure sensor could detect a tiny water droplet as light as 7mg. It is expected that the electrospun P(VDF-TrFE) nanofibers can be used as sensing materials for highly sensitive pressure sensors in wearable electronics applications. Published by AIP Publishing.
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