Graphene oxide papers modified by divalent ions - Enhancing mechanical properties via chemical cross-linking

Sungjin Park, Kyoung Seok Lee, Gulay Bozoklu, Weiwei Cai, Son Binh T. Nguyen, Rodney S. Ruoff*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1343 Scopus citations

Abstract

Significant enhancement in mechanical stiffess (10-200%) and fracture strength (∼50%) of graphene oxide paper, a novel paperlike material made from individual graphene oxide sheets, can be achieved upon modification with a small amount (less than 1 Wt%) of Mg2+ and Ca2+. These results can be readily rationalized in terms of the chemical interactions between the functional groups of the graphene oxide sheets and the divalent metals ions. While oxygen functional groups on the basal planes of the sheets and the carboxylate groups on the edges can both bond to Mg2+ and Ca2+, the main contribution to mechanical enhancement of the paper comes from the latter.

Original languageEnglish (US)
Pages (from-to)572-578
Number of pages7
JournalACS nano
Volume2
Issue number3
DOIs
StatePublished - Mar 2008

Keywords

  • Cross-linking
  • Divalent ion
  • Graphene oxide
  • Graphene oxide paper
  • Graphite
  • Mechanical property

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Graphene oxide papers modified by divalent ions - Enhancing mechanical properties via chemical cross-linking'. Together they form a unique fingerprint.

Cite this