Strong and Tough Nacre-Inspired Graphene Oxide Composite with Hierarchically Similar Structure

Hee Min Yang, Sunghwan Jo, Jun Ho Oh, Byoung Ho Choi, Ju Yeon Woo, Chang Soo Han

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We report a graphene oxide (GO)-based composite, featuring GO/cross-linking agent (CA) nanoparticles, inspired by a nacre-like hierarchical structure present in nature. The as-prepared GO/CA composite was powdered to nanoscale particles and then mixed with pure GO to be GO/CA/GO (GCG) composite forming hierarchical GO/CA nanoasperities on the GO surface. The strength and toughness of the nacre-inspired GCG composite films were simultaneously improved by adjusting the nanoparticle concentration and hierarchical level of the GO-based films. Compared to pristine GO films and GO/CA composites, which exhibit a low level of hierarchy in their structures, the tensile strength and toughness of the GCG composites with higher hierarchy were enhanced 3.1 and 1.6 times and 47.6 and 10.9 times, respectively. Furthermore, a plausible mechanism of increasing mechanical properties based on nanoscale asperities and homogeneous interactions between GO and CA has been discussed.

Original languageEnglish
Pages (from-to)10509-10516
Number of pages8
JournalACS nano
Issue number7
Publication statusPublished - 2022 Jul 26

Bibliographical note

Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.


  • composite
  • cross-linking agent
  • graphene oxide
  • hierarchical structure
  • mechanical properties

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


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