Tattoolike Polyaniline Microparticle-Doped Gold Nanowire Patches as Highly Durable Wearable Sensors

Shu Gong, Daniel T.H. Lai, Yan Wang, Lim Wei Yap, Kae Jye Si, Qianqian Shi, Naveen Noah Jason, Tam Sridhar, Hemayet Uddin, Wenlong Cheng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

202 Scopus citations

Abstract

Wearable and highly sensitive strain sensors are essential components of electronic skin for future biomonitoring and human machine interfaces. Here we report a low-cost yet efficient strategy to dope polyaniline microparticles into gold nanowire (AuNW) films, leading to 10 times enhancement in conductivity and ∼8 times improvement in sensitivity. Simultaneously, tattoolike wearable sensors could be fabricated simply by a direct "draw-on" strategy with a Chinese penbrush. The stretchability of the sensors could be enhanced from 99.7% to 149.6% by designing curved tattoo with different radius of curvatures. We also demonstrated roller coating method to encapusulate AuNWs sensors, exhibiting excellent water resistibility and durability. Because of improved conductivity of our sensors, they can directly interface with existing wireless circuitry, allowing for fabrication of wireless flexion sensors for a human finger-controlled robotic arm system.

Original languageEnglish
Pages (from-to)19700-19708
Number of pages9
JournalACS applied materials & interfaces
Volume7
Issue number35
DOIs
StatePublished - 9 Sep 2015
Externally publishedYes

Keywords

  • electronic skin
  • polyaniline
  • strain sensor
  • ultrathin gold nanowires
  • wearable

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