Artificial neuromorphic cognitive skins based on distributed biaxially stretchable elastomeric synaptic transistors

Hyunseok Shim, Seonmin Jang, Anish Thukral, Seongsik Jeong, Hyeseon Jo, Bin Kan, Shubham Patel, Guodan Wei, Wei Lan, Hae Jin Kim, Cunjiang Yu

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Cephalopod (e.g., squid, octopus, etc.) skin is a soft cognitive organ capable of elastic deformation, visualizing, stealth, and camouflaging through complex biological processes of sensing, recognition, neurologic processing, and actuation in a noncentralized, distributed manner. However, none of the existing artificial skin devices have shown distributed neuromorphic processing and cognition capabilities similar to those of a cephalopod skin. Thus, the creation of an elastic, biaxially stretchy device with embedded, distributed neurologic and cognitive functions mimicking a cephalopod skin can play a pivotal role in emerging robotics, wearables, skin prosthetics, bioelectronics, etc. This paper introduces artificial neuromorphic cognitive skins based on arrayed, biaxially stretchable synaptic transistors constructed entirely out of elastomeric materials. Systematic investigation of the synaptic characteristics such as the excitatory postsynaptic current, paired-pulse facilitation index of the biaxially stretchable synaptic transistor under various levels of biaxial mechanical strain sets the operational foundation for stretchy distributed synapse arrays and neuromorphic cognitive skin devices. The biaxially stretchy arrays here achieved neuromorphic cognitive functions, including image memorization, long-term memorization, fault tolerance, programming, and erasing functions under 30% biaxial mechanical strain. The stretchy neuromorphic imaging sensory skin devices showed stable neuromorphic pattern reinforcement performance under both biaxial and nonuniform local deformation.

Original languageEnglish (US)
Article numbere2204852119
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number23
StatePublished - Jun 7 2022

All Science Journal Classification (ASJC) codes

  • General


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