Synthesis of Graphene-Gold Nanocomposites via Sonochemical Reduction

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A Reduced reduced graphene oxide (RGO)-gold (Au) nanoparticle (NP) nanocomposite was synthesized by simultaneously reducing the Au ions and depositing Au NPs on onto the surface surface of the RGOsRGO simultaneously. To facilitate the reduction of Au ions and the generation of oxygen functionalities for anchoring the Au NPs on the RGOsRGO, ultrasound irradiation was applied to the mixture of reactants. The functional groups were investigated with FT-IR spectra. From the Raman and XPS spectra, the oxygen groups were identified as hydroxyl, epoxy, and carboxyl groups, the same as the one from graphene oxide (GO). As a result, the dense and uniform deposition of nanometer-sized Au NPs with nanometer size was observed on the AGO sheets sheet was observed with from the TEM imagesimage. The Oxygen oxygen functional groups that formed on the surface surface of the RGOs AGO seemed to have served serve as links for Au NPs NP attachment, through the electrostatic attraction of Au ions. Hybrid materials could thus be produced in a short time, with a high yield, by via ultrasound application. Besides, it ultrasound application could can readily take goldAu- binding- peptide (GBP)-modified biomolecules, readily implying its possibility in possible biological applications.
Publisher
AMER SCIENTIFIC PUBLISHERS
Issue Date
2011-07
Language
English
Article Type
Article
Keywords

GRAPHITE OXIDE; FUNCTIONALIZED GRAPHENE; CARBON NANOTUBES; NANOPARTICLES; SHEETS; NANOSHEETS; DEPOSITION; BIOSENSORS; FILMS

Citation

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.11, no.7, pp.6095 - 6101

ISSN
1533-4880
URI
http://hdl.handle.net/10203/101345
Appears in Collection
CBE-Journal Papers(저널논문)
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