Healing Graphene Defects Using Selective Electrochemical Deposition: Toward Flexible and Stretchable Devices

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Graphene produced by chemical-vapor-deposition inevitably has defects such as grain boundaries, pinholes, wrinkles, and cracks, which are the most significant obstacles for the realization of superior properties of pristine graphene. Despite efforts to reduce these defects during synthesis, significant damages are further induced during integration and operation of flexible and stretchable applications. Therefore, defect healing is required in order to recover the ideal properties of graphene. Here, the electrical and mechanical properties of graphene are healed on the basis of selective electrochemical deposition on graphene defects. By exploiting the high current density on the defects during the electrodeposition, metal ions such as silver and gold can be selectively reduced. The process is universally applicable to conductive and insulating substrates because graphene can serve as a conducting channel of electrons. The physically filled metal on the defects improves the electrical conductivity and mechanical stretchability by means of reducing contact resistance and crack density. The healing of graphene defects is enabled by the solution-based room temperature electrodeposition process, which 'broadens the use of graphene as an engineering material.
Publisher
AMER CHEMICAL SOC
Issue Date
2016-01
Language
English
Article Type
Article
Keywords

COPPER FOILS; FILMS; ELECTRODEPOSITION; NANOPARTICLES; SURFACE; CARBON; SILVER; LAYER

Citation

ACS NANO, v.10, no.1, pp.1539 - 1545

ISSN
1936-0851
DOI
10.1021/acsnano.5b07098
URI
http://hdl.handle.net/10203/207754
Appears in Collection
EE-Journal Papers(저널논문)ME-Journal Papers(저널논문)
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