title: 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 HAuCl(4) with CDs at 100 °C. By adjusting the feeding mass ratio of HAuCl(4) 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.
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
authors.forename: Peihui
authors.initials: P
authors.lastname: Luo
authors.forename: Chun
authors.initials: C
authors.lastname: Li
authors.forename: Gaoquan
authors.initials: G
authors.lastname: Shi
mesh_terms: D002244:Carbon / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010316:Particle Size; D012235:Rhodamines / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
chemical_list: D012235:Rhodamines; C026188:rhodamine 6G; D002244:Carbon; D006046:Gold