期刊
出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2204852119
关键词
stretchy; distributed; synaptic transistor; neuromorphic; sensory skin
资金
- Office of Naval Research [N00014-18-1-2338]
- NSF [1554499, 1935291, 1931893]
- Directorate For Engineering
- Emerging Frontiers & Multidisciplinary Activities [1935291] Funding Source: National Science Foundation
- Division Of Computer and Network Systems
- Direct For Computer & Info Scie & Enginr [1931893] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1554499] Funding Source: National Science Foundation
This paper introduces artificial neuromorphic cognitive skins based on elastomeric materials, which can achieve functions such as image memorization and programming through excitatory postsynaptic currents and paired-pulse facilitation index. It has important applications in robotics, wearables, skin prosthetics, and bioelectronics.
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.
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