Evolution of order during vacuum-assisted self-assembly of graphene oxide paper and associated polymer nanocomposites

Karl W. Putz, Owen C. Compton, Claire Segar, Zhi An, Sonbinh T. Nguyen*, L. Catherine Brinson

*Corresponding author for this work

Research output: Contribution to journalArticle

119 Scopus citations

Abstract

Three mechanisms are proposed for the assembly of ordered, layered structures of graphene oxide, formed via the vacuum-assisted self-assembly of a dispersion of the two-dimensional nanosheets. These possible mechanisms for ordering at the filter-solution interface range from regular brick-and-mortar-like growth to complete disordered aggregation and compression. Through a series of experiments (thermal gravimetric analysis, UV-vis spectroscopy, and X-ray diffraction) a semi-ordered accumulation mechanism is identified as being dominant during paper fabrication. Additionally, a higher length-scale ordered structure (lamellae) is identified through the examination of water-swelled samples, indicating that further refinements are required to capture the complete formation mechanism. Identification of this mechanism and the resulting higher-order structure it produces provide insight into possibilities for creation of ordered graphene oxide-polymer nanocomposites, as well as the postfabrication modification of single-component graphene oxide papers.

Original languageEnglish (US)
Pages (from-to)6601-6609
Number of pages9
JournalACS nano
Volume5
Issue number8
DOIs
StatePublished - Aug 23 2011

Keywords

  • graphene oxide
  • hierarchical structure
  • nanostructures
  • polymer nanocomposite
  • self assembly

ASJC Scopus subject areas

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

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