Fingertip-Skin-Inspired Highly Sensitive and Multifunctional Sensor with Hierarchically Structured Conductive Graphite/Polydimethylsiloxane Foams

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

4 Scopus Citations
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Detail(s)

Original languageEnglish
Article number1808829
Journal / PublicationAdvanced Functional Materials
Volume29
Issue number18
Early online date7 Mar 2019
Publication statusPublished - 2 May 2019

Abstract

Fingertip skin exhibits high sensitivity in a broad pressure range, and can detect diverse stimuli, including textures, temperature, humidity, etc. Despite adopting diverse microstructures and functional materials, achieving skin sensor devices possessing high pressure sensitivity over a wide linear range and with multifunctional sensing capabilities is still challenging. Herein, inspired by the microstructures of fingertip skin, a highly sensitive skin sensor is demonstrated with a linear response over a broad pressure range and multifunctional sensing capabilities. The porous sensing layer is designed with hierarchical microstructures on the surface. By optimizing the porosity and the graphite concentration, a fabricated skin sensor device exhibits a superior sensitivity of 245 kPa−1 over a broad linear pressure range from 5 Pa to 120 kPa. For practical application demonstrations, the sensor devices are utilized to monitor subtle wrist pulse and diverse human motions including finger bending, wrist bending, and feet movement. Furthermore, this novel sensor device demonstrates potential applications in recognizing textures and detecting environmental temperatures, thereby marking an important progress for constructing advanced electronic skin.

Research Area(s)

  • healthcare monitoring, microstructure, multifunctional sensing, skin sensor, temperature sensing

Citation Format(s)

Fingertip-Skin-Inspired Highly Sensitive and Multifunctional Sensor with Hierarchically Structured Conductive Graphite/Polydimethylsiloxane Foams. / Sun, Qi-Jun; Zhao, Xin-Hua; Zhou, Ye; Yeung, Chi-Chung; Wu, Wei; Venkatesh, Shishir; Xu, Zong-Xiang; Wylie, Jonathan J.; Li, Wen-Jung; Roy, Vellaisamy A. L.

In: Advanced Functional Materials, Vol. 29, No. 18, 1808829, 02.05.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review