A wearable piezocapacitive pressure sensor with a single layer of silver nanowire-based elastomeric composite electrodes

Banseok You, Chul Jong Han, Youngmin Kim, Byeong Kwon Ju, Jong Woong Kim

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

A highly stretchable and transparent pressure sensor based on a single layer silver nanowire (AgNW) electrode was successfully fabricated. In order to achieve this, we synthesized a stretchable and transparent adhesive, polyurethane urea (PUU), which was designed to firmly adhere to the AgNWs by incorporating 2,2-bis(hydroxymethyl)butyric acid with a carboxylic group. A patterned AgNW-based sensing electrode could be completely transferred to a PUU film deposited on a poly(dimethylsiloxane) (PDMS) substrate, resulting in a AgNW/PUU/PDMS pressure-sensitive capacitor. The capacitance was developed on a AgNW tandem compound electrode pattern by the fringing effect, which decreased with increasing pressure applied to the surface of the sensor. The sensitivity did not significantly deteriorate, even when the sensor was stretched up to a strain of 35% or when the stretching was cycled up to 10000 times. A wearable acupressure sensor with a pressure sensitive matrix of nine pixels was successfully demonstrated.

Original languageEnglish
Pages (from-to)10435-10443
Number of pages9
JournalJournal of Materials Chemistry A
Volume4
Issue number27
DOIs
Publication statusPublished - 2016

Fingerprint

Polyurethanes
Pressure sensors
Silver
Urea
Nanowires
Polydimethylsiloxane
Electrodes
Composite materials
Butyric acid
Butyric Acid
Sensors
Stretching
Adhesives
Capacitors
Capacitance
Pixels
Substrates
Wearable sensors
elastomeric
baysilon

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

A wearable piezocapacitive pressure sensor with a single layer of silver nanowire-based elastomeric composite electrodes. / You, Banseok; Han, Chul Jong; Kim, Youngmin; Ju, Byeong Kwon; Kim, Jong Woong.

In: Journal of Materials Chemistry A, Vol. 4, No. 27, 2016, p. 10435-10443.

Research output: Contribution to journalArticle

You, Banseok ; Han, Chul Jong ; Kim, Youngmin ; Ju, Byeong Kwon ; Kim, Jong Woong. / A wearable piezocapacitive pressure sensor with a single layer of silver nanowire-based elastomeric composite electrodes. In: Journal of Materials Chemistry A. 2016 ; Vol. 4, No. 27. pp. 10435-10443.
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