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Author

Chae, Han Gi
Polymer nano-composites and Carbon Fiber Laboratory (P&C Lab)
Research Interests
  • Polymer Physics/ Processing, Carbon Nano-materials, Ultra high performance/ multifuctional nano-composites, Smart textile/ fiber

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Pt nanoparticle-decorated reduced graphene oxide hydrogel for high-performance strain sensor: Tailoring piezoresistive property by controlled microstructure of hydrogel

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Title
Pt nanoparticle-decorated reduced graphene oxide hydrogel for high-performance strain sensor: Tailoring piezoresistive property by controlled microstructure of hydrogel
Author
Hwang, Sang-HaPark, Young-BinHur, Seung-HyunChae, Han Gi
Keywords
chemical reduction; graphene; graphene oxide; hydrogel; piezoresistivity; platinum nanoparticle
Issue Date
201806
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED NANO MATERIALS, v.1, no.6, pp.2836 - 2843
Abstract
A class of conducting reduced graphene oxide hydrogels is prepared with various porosities, surface areas, and electrical conductivities using ethylenediamine (EDA)/functionalized graphene oxide (GO) and ascorbic acid (VC)/GO by hydrothermal method. The microstructure of hydrogels is tailored by changing the composition of materials. It is observed that the conducing network is formed by cross-linked graphene platelets, and the piezoresistive behavior of hydrogels under cyclic compressive strain shows a linear trend up to 6.8% strain when the hydrogel is prepared by adding 5 wt % of EDA in aqueous GO solution. In addition, platinum nanoparticle-decorated (Pt NP-decorated) EDA-GO hydrogel was also prepared, showing greatly improved linear strain range as high as 52.8% with an increase in compressive modulus by 873% because of the multiscale reinforcing mechanism, which is attributed to the strong interaction between Pt NPs and graphene platelets. The piezoresistivity of the hydrogels can be of great interest in the field of high-performance strain sensors.
URI
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DOI
http://dx.doi.org/10.1021/acsanm.8b00483
ISSN
2574-0970
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