Issue 20, 2012

Synthesis of gold@carbon dots composite nanoparticles for surface enhanced Raman scattering

Abstract

Gold@carbon dots composite nanoparticles (Au@CDs) with ultrathin carbon dot (CD) shells of ca. 2 nm were prepared by reducing HAuCl4 with CDs at 100 °C. By adjusting the feeding mass ratio of HAuCl4 to CDs, the average diameters of Au@CDs can be modulated from 8 to 44 nm. The suspension of Au@CDs with an average diameter of ca. 24 nm was applied as a substrate for surface enhanced Raman scattering (SERS) and it exhibited a higher SERS effect for rhodamine 6G (Rh6G) than the suspension of pure Au nanoparticles with nearly the same size. The excellent SERS effect of Au@CDs is mainly attributed to their improved capability of adsorbing the aromatic probe molecules.

Graphical abstract: Synthesis of gold@carbon dots composite nanoparticles for surface enhanced Raman scattering

Supplementary files

Article information

Article type
Paper
Submitted
10 Mar 2012
Accepted
02 Apr 2012
First published
02 Apr 2012

Phys. Chem. Chem. Phys., 2012,14, 7360-7366

Synthesis of gold@carbon dots composite nanoparticles for surface enhanced Raman scattering

P. Luo, C. Li and G. Shi, Phys. Chem. Chem. Phys., 2012, 14, 7360 DOI: 10.1039/C2CP40767A

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