Design and evaluation of a highly stretchable and conductive thin film for tactile sensors

Yuhang Sun, Debao Zhou, Jing Bai, Haopeng Wang, Jianguo Cao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Keeping good conductivity at high stretching strain is one of the main requirements for the design of flexible electronic devices. The elastic nature of siloxane-based elastomers enables many innovative designs in wearable sensor devices and non-invasive insert instruments. Over the last few years, Poly-di-methyl-siloxane (PDMS) thin films have been heavily used as the substrates in the fabrication of tactile sensing devices due to their high sensitivity, good elasticity and outstanding biocompatibility. However, these kinds of conductors usually suffer poor tearing property and insufficient compliance to curved surfaces, which greatly limited their applications. Currently no three-dimensionally mountable sensor arrays have been reported. In this work, we developed an excellent mechanically compliant skin-like conductors by patterning silver nano wire traces in Dragon Skin® substrate instead of PDMS substrate, high cross-link quality was achieved then. Moreover, to further enhance the conductivity, a thin gold layer was coated on the AgNWs strips, 4 different fabrication routines was designed and conducted. Thanks to the intrinsically outstanding physical property of Dragon Skin and the uniform embedment built in fabrication process, the AgNWs/Dragon Skin layer showed convincible advantage over AgNWs/PDMS layer both in mechanical capability and conductive stability.

Original languageEnglish (US)
Title of host publicationNSTI
Subtitle of host publicationAdvanced Manufacturing, Electronics and Microsystems - TechConnect Briefs 2015
EditorsBart Romanowicz, Matthew Laudon
PublisherTaylor and Francis Inc.
Pages112-115
Number of pages4
ISBN (Electronic)9781498747301
StatePublished - Jan 1 2015
Event10th Annual TechConnect World Innovation Conference and Expo, Held Jointly with the 18th Annual Nanotech Conference and Expo, and the 2015 National SBIR/STTR Conference - Washington, United States
Duration: Jun 14 2015Jun 17 2015

Publication series

NameNSTI: Advanced Materials - TechConnect Briefs 2015
Volume4

Other

Other10th Annual TechConnect World Innovation Conference and Expo, Held Jointly with the 18th Annual Nanotech Conference and Expo, and the 2015 National SBIR/STTR Conference
CountryUnited States
CityWashington
Period6/14/156/17/15

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Keywords

  • Conductivity
  • Dragon Skin
  • Electronic sensor
  • PDMS
  • Stretchability

Cite this

Sun, Y., Zhou, D., Bai, J., Wang, H., & Cao, J. (2015). Design and evaluation of a highly stretchable and conductive thin film for tactile sensors. In B. Romanowicz, & M. Laudon (Eds.), NSTI: Advanced Manufacturing, Electronics and Microsystems - TechConnect Briefs 2015 (pp. 112-115). (NSTI: Advanced Materials - TechConnect Briefs 2015; Vol. 4). Taylor and Francis Inc..