Healable capacitive touch screen sensors based on transparent composite electrodes comprising silver nanowires and a furan/maleimide diels-Alder cycloaddition polymer

Junpeng Li, Jiajie Liang, Lu Li, Fengbo Ren, Wei Hu, Juan Li, Shuhua Qi, Qibing Pei

Research output: Contribution to journalArticle

84 Citations (Scopus)

Abstract

A healable transparent capacitive touch screen sensor has been fabricated based on a healable silver nanowire-polymer composite electrode. The composite electrode features a layer of silver nanowire percolation network embedded into the surface layer of a polymer substrate comprising an ultrathin soldering polymer layer to confine the nanowires to the surface of a healable Diels-Alder cycloaddition copolymer and to attain low contact resistance between the nanowires. The composite electrode has a figure-of-merit sheet resistance of 18 ω/sq with 80% transmittance at 550 nm. A surface crack cut on the conductive surface with 18 ω is healed by heating at 100 °C, and the sheet resistance recovers to 21 ω in 6 min. A healable touch screen sensor with an array of 8 × 8 capacitive sensing points is prepared by stacking two composite films patterned with 8 rows and 8 columns of coupling electrodes at 90° angle. After deliberate damage, the coupling electrodes recover touch sensing function upon heating at 80 °C for 30 s. A capacitive touch screen based on Arduino is demonstrated capable of performing quick recovery from malfunction caused by a razor blade cutting. After four cycles of cutting and healing, the sensor array remains functional.

Original languageEnglish (US)
Pages (from-to)12874-12882
Number of pages9
JournalACS Nano
Volume8
Issue number12
DOIs
StatePublished - Dec 23 2014
Externally publishedYes

Fingerprint

Touch screens
Cycloaddition
furans
cycloaddition
Silver
Nanowires
Polymers
nanowires
silver
Electrodes
composite materials
electrodes
sensors
Sensors
Composite materials
polymers
Sheet resistance
razor blades
Heating
malfunctions

Keywords

  • capacitive touch sensor
  • self-healing
  • silver nanowire
  • transparent composite electrode

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Healable capacitive touch screen sensors based on transparent composite electrodes comprising silver nanowires and a furan/maleimide diels-Alder cycloaddition polymer. / Li, Junpeng; Liang, Jiajie; Li, Lu; Ren, Fengbo; Hu, Wei; Li, Juan; Qi, Shuhua; Pei, Qibing.

In: ACS Nano, Vol. 8, No. 12, 23.12.2014, p. 12874-12882.

Research output: Contribution to journalArticle

Li, Junpeng ; Liang, Jiajie ; Li, Lu ; Ren, Fengbo ; Hu, Wei ; Li, Juan ; Qi, Shuhua ; Pei, Qibing. / Healable capacitive touch screen sensors based on transparent composite electrodes comprising silver nanowires and a furan/maleimide diels-Alder cycloaddition polymer. In: ACS Nano. 2014 ; Vol. 8, No. 12. pp. 12874-12882.
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