Nano Research

, Volume 2, Issue 3, pp 192–200

Facile, noncovalent decoration of graphene oxide sheets with nanocrystals

Authors

  • Ganhua Lu
    • Department of Mechanical EngineeringUniversity of Wisconsin-Milwaukee
  • Shun Mao
    • Department of Mechanical EngineeringUniversity of Wisconsin-Milwaukee
  • Sungjin Park
    • Department of Mechanical Engineering and the Texas Materials InstituteUniversity of Texas at Austin
  • Rodney S. Ruoff
    • Department of Mechanical Engineering and the Texas Materials InstituteUniversity of Texas at Austin
    • Department of Mechanical EngineeringUniversity of Wisconsin-Milwaukee
Open AccessResearch Article

DOI: 10.1007/s12274-009-9017-8

Abstract

Facile dry decoration of graphene oxide sheets with aerosol Ag nanocrystals synthesized from an arc plasma source has been demonstrated using an electrostatic force directed assembly technique at room temperature. The Ag nanocrystal-graphene oxide hybrid structure was characterized by transmission electron microscopy (TEM) and selected area diffraction. The ripening of Ag nanocrystals on a graphene oxide sheet was studied by consecutive TEM imaging of the same region on a sample after heating in Ar at elevated temperatures of 100 °C, 200 °C, and 300 °C. The average size of Ag nanocrystals increased and the number density decreased after the annealing process. In particular, migration and coalescence of Ag nanocrystals were observed at a temperature as low as 100 °C, suggesting a van der Waals interaction between the Ag nanocrystal and the graphene oxide sheet. The availability of affordable graphene-nanocrystal structures and their fundamental properties will open up new opportunities for nanoscience and nanotechnology and accelerate their applications.

https://static-content.springer.com/image/art%3A10.1007%2Fs12274-009-9017-8/MediaObjects/12274_2009_9017_Fig1_HTML.gif

Keywords

Graphene oxide silver nanocrystals hybrid nanostructures nanocrystal ripening

Copyright information

© Tsinghua University Press and Springer-Verlag GmbH 2009