Ultralightweight Strain-Responsive 3D Graphene Network

Dong Hae Ho, Hyun Min Jun, Seon Ju Yeo, Panuk Hong, Min Jun Oh, Byung Mook Weon, Won Bo Lee, S. Joon Kwon, Pil J. Yoo, Jeong Ho Cho

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this study, we fabricated a three-dimensionally assembled architecture made of reduced graphene oxide (rGO) and utilized it as an ultralightweight strain gauge. Building units for the assembly were prepared over the multiscale starting from functionalized GO nanosheets at the nanoscale to microfluidically processed solid-shelled bubbles at the microscale. These GO solid bubbles were elaborately assembled into close-packed 3D structures over the centimeter scale and then reduced by thermal treatment. Thermally reduced rGO assembly of which the internal structure was spontaneously transformed into a closed-cellular structure such as the 3D rhombic dodecahedral honeycomb lattice during thermal reduction could manifest superior elasticity against a strain of 30% by virtue of the hierarchically interconnected network while securing a low density of about 10 mg/cm 3 and mechanical robustness, which was then applied as a strain gauge. The strain gauge with a thermally reduced 3D rGO structure exhibited a gauge factor of around 4 and excellent mechanical durability over 250 cycles, suggesting a new pathway for implementing ultralightweight strain-sensitive materials.

Original languageEnglish
Pages (from-to)9884-9893
Number of pages10
JournalJournal of Physical Chemistry C
Volume123
Issue number15
DOIs
Publication statusPublished - 2019 Apr 18

Bibliographical note

Funding Information:
This work was mainly supported by Samsung Research Funding Center for Samsung Electronics under Project Number SRFC-MA1602-02. This work is partially supported by the institutional research program of the Korea Institute of Science and Technology (KIST) (2E28070).

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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