[Colloid and Polymer Science] Coating Sulfonated Polystyrene Microspheres with High Dense Gold Nanoparticle Shell for SERS Application
writer：Wujin Cai, Wenqin Wang, Linchao Lu, Tao Chen*
keywords：Polystyrene Microspheres, Gold NPs, SERS
source：期刊
specific source：Colloid and Polymer Science, 2013, 291, 2023-2029
Issue time：2013年
The fabrication of high dense gold nanoparticles (NPs) coated sulfonated polystyrene (PS) microspheres and their application in surface-enhanced Raman spectroscopy (SERS) were reported. After the preparation of PS microsphere using dispersion polymerization and subsequent sulfonation, [Ag(NH3)2]+ ions were adsorbed on the surfaces of the sulfonated-PS microspheres and then reduced to silver nanoseeds for further growth of gold NPs shell by seeded-growth approach. Reaction conditions such as the concentration of the growth solution and growth time were adjusted to achieve nonspherical gold NPs coated PS microspheres with different coverage degree. The application of the as-prepared spiky gold NPs-coated PS microsphere hybrid composite in SERS was finally investigated by using 4-aminothiophenol (4-ATP) as probe molecules. The results showed that as-prepared gold NPs coated PS microspheres could be used as functional hybrid materials to exhibit excellent enhancement ability in SERS.