| An electrically and mechanically self-healing composite with pressure- and flexion-sensitive properties for electronic skin applications. | |
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MedLine Citation:
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PMID: 23142944 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Pressure sensitivity and mechanical self-healing are two vital functions of the human skin. A flexible and electrically conducting material that can sense mechanical forces and yet be able to self-heal repeatably can be of use in emerging fields such as soft robotics and biomimetic prostheses, but combining all these properties together remains a challenging task. Here, we describe a composite material composed of a supramolecular organic polymer with embedded nickel nanostructured microparticles, which shows mechanical and electrical self-healing properties at ambient conditions. We also show that our material is pressure- and flexion-sensitive, and therefore suitable for electronic skin applications. The electrical conductivity can be tuned by varying the amount of nickel particles and can reach values as high as 40 S cm(-1). On rupture, the initial conductivity is repeatably restored with ∼90% efficiency after 15 s healing time, and the mechanical properties are completely restored after ∼10 min. The composite resistance varies inversely with applied flexion and tactile forces. These results demonstrate that natural skin's repeatable self-healing capability can be mimicked in conductive and piezoresistive materials, thus potentially expanding the scope of applications of current electronic skin systems. |
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Authors:
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Benjamin C-K Tee; Chao Wang; Ranulfo Allen; Zhenan Bao |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-11-11 |
Journal Detail:
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Title: Nature nanotechnology Volume: - ISSN: 1748-3395 ISO Abbreviation: Nat Nanotechnol Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101283273 Medline TA: Nat Nanotechnol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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1] Department of Electrical Engineering, Stanford University, David Packard Building, Stanford, California 94305, USA [2]. |
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