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Kim, Ju-Young
Robust Multifunctional Materials Lab
Research Interests
  • Flexible / stretchable devices, nano-mechanics, nanoporous metal, materials reliability


Self-Healing of Nanoporous Gold Under Ambient Conditions

DC Field Value Language Gwak, Eun-Ji ko Jeon, Hansol ko Song, Eunji ko Kim, Ju-Young ko 2020-10-22T08:09:00Z - 2020-10-13 ko 2020-09 ko
dc.identifier.citation NANO LETTERS, v.20, no.9, pp.6706 - 6711 ko
dc.identifier.issn 1530-6984 ko
dc.identifier.uri -
dc.description.abstract Failure of a material is an irreversible process since the material loses its original characteristics and properties. The catastrophic brittle failure under tensile stress of nanoporous gold (np-Au) with a bicontinuous open-cell structure makes impossible otherwise attractive applications. Here, we first demonstrate a self-healing process in tensile-fractured np-Au to overcome the limit of fragility via mechanically assisted cold-welding under ambient conditions. The self-healing ability of np-Au in terms of mechanical properties shows strength recovery up to 64.4% and fully recovered elastic modulus compared with initial tensile properties. Topological parameters obtained by three-dimensional reconstruction of self-healed np-Au clarify the strength, elastic modulus, and strain distribution. The self-healing process in np-Au is attributed to surface diffusion expedited by local compressive stress in the ultrasmall dimension of ligaments formed by ductile failures of individual ligaments. ko
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Self-Healing of Nanoporous Gold Under Ambient Conditions ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85090869445 ko
dc.identifier.wosid 000571442000062 ko
dc.type.rims ART ko
dc.identifier.doi 10.1021/acs.nanolett.0c02551 ko
dc.identifier.url ko
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