Nano Archive

Facile, noncovalent decoration of graphene oxide sheets with nanocrystals

Lu, Ganhua and Mao, Shun and Park, Sungjin and Ruoff, Rodney S. and Chen, Junhong (2009) Facile, noncovalent decoration of graphene oxide sheets with nanocrystals. Nano Research, 2 (3). pp. 192-200.

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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.

Item Type:Article
Uncontrolled Keywords:Graphene oxide - silver nanocrystals - hybrid nanostructures - nanocrystal ripening
Subjects:Material Science > Nanofabrication processes and tools
ID Code:4260
Deposited By:Prof. Alexey Ivanov
Deposited On:16 Mar 2009 09:42
Last Modified:12 Aug 2009 12:15

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