Affiliation:
1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Chemistry and Chemical Engineering & Center for Advanced Low‐dimension Materials Donghua University Shanghai 201620 P. R. China
Abstract
AbstractHumans use periodically ridged fingertips to precisely perceive the characteristics of objects via ion‐based fast‐ and slow‐adaptive mechanotransduction. However, designing artificial ionic skins with fingertip‐like tactile capabilities remains challenging because of the contradiction between structural compliance and pressure sensing accuracy (e.g., anti‐interference from stretch and texture recognition). Inspired by the formation and modulus‐contrast hierarchical structure of fingertips, an aesthetic ionic skin grown from a non‐equilibrium Liesegang patterning process is introduced. This ionic skin with periodic stiff ridges embedded in a soft hydrogel matrix enables strain‐undisturbed triboelectric dynamic pressure sensing as well as vibrotactile texture recognition. By coupling with another piezoresistive ionogel, an artificial tactile sensory system is further fabricated as a soft robotic skin to mimic the simultaneous fast‐ and slow‐adaptive multimodal sensations of fingers in grasping actions. This approach may inspire the future design of high‐performance ionic tactile sensors for intelligent applications in soft robotics and prosthetics.
Funder
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
76 articles.
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