Artificial multimodal receptors based on ion relaxation dynamics

Insang You, David G. MacKanic, Naoji Matsuhisa, Jiheong Kang, Jimin Kwon, Levent Beker, Jaewan Mun, Wonjeong Suh, Tae Yeong Kim, Jeffrey B.H. Tok, Zhenan Bao, Unyong Jeong

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

Human skin has different types of tactile receptors that can distinguish various mechanical stimuli from temperature. We present a deformable artificial multimodal ionic receptor that can differentiate thermal and mechanical information without signal interference. Two variables are derived from the analysis of the ion relaxation dynamics: the charge relaxation time as a strain-insensitive intrinsic variable to measure absolute temperature and the normalized capacitance as a temperature-insensitive extrinsic variable to measure strain. The artificial receptor with a simple electrode-electrolyte-electrode structure simultaneously detects temperature and strain by measuring the variables at only two measurement frequencies. The human skin-like multimodal receptor array, called multimodal ionelectronic skin (IEM-skin), provides real-time force directions and strain profiles in various tactile motions (shear, pinch, spread, torsion, and so on).

Original languageEnglish
Pages (from-to)961-965
Number of pages5
JournalScience
Volume370
Issue number6519
DOIs
Publication statusPublished - 2020 Nov 20
Externally publishedYes

ASJC Scopus subject areas

  • General

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