Flexible transparent iontronic film for interfacial capacitive pressure sensing

Adv Mater. 2015 Oct 21;27(39):6055-62. doi: 10.1002/adma.201502556. Epub 2015 Sep 1.

Abstract

A flexible, transparent iontronic film is introduced as a thin-film capacitive sensing material for emerging wearable and health-monitoring applications. Utilizing the capacitive interface at the ionic-electronic contact, the iontronic film sensor offers a large unit-area capacitance (of 5.4 μF cm(-2) ) and an ultrahigh sensitivity (of 3.1 nF kPa(-1) ), which is a thousand times greater than that of traditional solid-state counterparts.

Keywords: capacitive sensing; electrical double layers; interfacial capacitances; ionic gels; pressure sensors.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Elasticity*
  • Electric Capacitance*
  • Electrical Equipment and Supplies*
  • Electrodes
  • Equipment Design
  • Gels
  • Graphite
  • Ionic Liquids / chemistry
  • Molecular Structure
  • Polyethylene Glycols / chemistry
  • Pressure*
  • Temperature

Substances

  • Gels
  • Ionic Liquids
  • poly(ethylene glycol)diacrylate
  • Polyethylene Glycols
  • Graphite