NDLI: A general and efficient method for decorating graphene sheets with metal nanoparticles based on the non-covalently functionalized graphene sheets with hyperbranched polymers

Content Provider	Royal Society of Chemistry (RSC)
Author	Li, Haiqing Kim, Il Han, Lina Cooper-White, Justin J.
Copyright Year	2012
Abstract	Multipyrene terminated hyperbranched polyglycidol (mPHP) has been synthesized and used to non-covalently functionalize pristine graphene sheets (GSs) through π–π stacking interactions. Mediated by the mPHP layer, a variety of metal nanoparticles (Au, Ag and Pt) were in situ generated and deposited onto the surface-modified GS, yielding versatile GS/mPHP/metal nanohybrids. As typical examples, by simply controlling the concentration of HAuCl4 used, Au nanostructures ranging from isolated spheres to a continuous film were created and coated onto the surface-modified GS. The studies on the fluorescence properties of resulting GS/mPHP/Au hybrid nanostructures reveal that the GS and controllable content of Au components in the hybrids can effectively quench the fluorescence emission of mPHP in a controlled manner. Further investigation indicates that GS/mPHP/Au hybrids are promising surface enhanced Raman scattering (SERS) substrates. The SERS activities of these hybrids depend on the contents and form of the Au. The GS/mPHP/Au hybrid containing continuous Au films exhibits the strongest SERS activity. GS/mPHP/Au hybrids are also used as efficient heterogeneous catalysts for the reduction of 4-NP, and demonstrate excellent catalytic performance. The detailed reaction kinetics and the reusability of such catalysts have also been investigated.
Starting Page	1355
Ending Page	1361
Page Count	7
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	4
Issue Number	4
Journal	Nanoscale
DOI	10.1039/c2nr11812b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Multipyrene Graphene Surface-enhanced Raman spectroscopy Fluorescence Raman
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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