An Ultrasensitive, Visco-Poroelastic Artificial Mechanotransducer Skin Inspired by Piezo2 Protein in Mammalian Merkel Cells

Ming Liang Jin, Sangsik Park, Younghoon Lee, Ji Hye Lee, Junho Chung, Joo Sung Kim, Jong Seon Kim, So Young Kim, Eunsong Jee, Dae Woo Kim, Jae Woo Chung, Seung Geol Lee, Dukhyun Choi, Hee Tae Jung, Do Hwan Kim

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79 Citations (Scopus)

Abstract

Researchers describe a mechanically activated visco-poroelastic nanochannel on the basis of artificial ionic fluids and a viscoelastic biocompatible polymer network to closely emulate the Piezo2 nanochannel in epidermal mammalian Merkel cells. They implemented these in a piezocapacitive artificial ionic mechanotransducer (IMT) that involved the sequential pressing, chain deformation, and ion migration process. They also enhanced an effective output stress by introducing the pillar-type microstructure on the surface of visco-poroelastic film, thereby resulting in inducing an efficient squeezing-out of ionic liquids at even low stimuli. The artificial IMT exhibited ultrahigh sensitivity and operational stability over a wide range of mechanical stimuli, including conditions conducive to real-time ubiquitous health care, daily activities, and even weight measurement.

Original languageEnglish
Article number1605973
JournalAdvanced Materials
Volume29
Issue number13
DOIs
Publication statusPublished - 2017 Apr 4

Bibliographical note

Funding Information:
M.L.J. and S.P. contributed equally to this work. This work was financially supported by the Center for Advanced Soft-Electronics under the Global Frontier Project (CASE-2014M3A6A5060932 and CASE-2014M3A6A5060937) and the Basic Science Research Program (2014R1A1A1005933 and 2015R1A2A1A05001844) of the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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