• 文献标题:   Evolution of Order During Vacuum-Assisted Self-Assembly of Graphene Oxide Paper and Associated Polymer Nanocomposites
  • 文献类型:   Article
  • 作  者:   PUTZ KW, COMPTON OC, SEGAR C, AN Z, NGUYEN ST, BRINSON LC
  • 作者关键词:   graphene oxide, polymer nanocomposite, self assembly, hierarchical structure, nanostructure
  • 出版物名称:   ACS NANO
  • ISSN:   1936-0851
  • 通讯作者地址:   Northwestern Univ
  • 被引频次:   102
  • DOI:   10.1021/nn202040c
  • 出版年:   2011

▎ 摘  要

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 odering 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 madification. of single-component. graphene oxide papers.