Ice-Templated Bimodal-Porous Silver Nanowire/PDMS Nanocomposites for Stretchable Conductor

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A three-dimensional (3D) bimodal-porous silver nanowire (AgNW) nanostructure with superior electrical properties is fabricated by freeze drying of AgNW aqueous dispersion with macrosized ice spheres for bimodal-porous structure. The ice sphere dispersed AgNW solution yields a 3D AgNW network at the surface of ice sphere and formation of macropores by removal of ice sphere during freeze-drying process. The resulting nanostructures exhibit excellent electrical properties due to their low electrical percolation threshold by the formation of macropores, which results in an efficient and dense 3D AgNW network with a small amount of AgNWs. The highly conductive and stretchable AgNW/poly(dimethylsiloxane) (PDMS) nanocomposites are made by impregnating the 3D porous conductive network with highly stretchable poly(dimethylsiloxane) (PDMS) matrix. The AgNW/PDMS nanocomposites exhibit a high conductivity of 42 S/cm with addition of relatively small amount of 2 wt %. The high conductivity is retained when stretched up to 120% elongation even after 100 stretching releasing cycles. Due to high electrical conductivity and superior stretchability of AgNW/PDMS nanocomposites, these are expected to be used in stretchable electronic devices.
Publisher
AMER CHEMICAL SOC
Issue Date
2018-06
Language
English
Article Type
Article
Keywords

CHEMICAL-VAPOR-DEPOSITION; POLYMER COMPOSITES; AEROGEL MONOLITHS; NETWORKS; UNIFORM

Citation

ACS APPLIED MATERIALS & INTERFACES, v.10, no.25, pp.21666 - 21671

ISSN
1944-8244
DOI
10.1021/acsami.8b06536
URI
http://hdl.handle.net/10203/244692
Appears in Collection
MS-Journal Papers(저널논문)
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