writer：Wenqin Wang*, Hanzhi Zou, Guoke Xing, Mengying Shang, Tao Chen
keywords：polymer brushes, Nanoparticles
source：期刊
specific source：RSC Advances, 2017, 7, 28024
Issue time：2017年

Using polymer brushes to guide the growth of gold nanostructures is of great scientific and technological importance.We report a new strategy to tune the shape of gold nanoparticles (NPs) on poly(2-vinylpyridine) (P2VP) brushes through vapor deposition polymerization of pyrrole: P2VP brushes loaded with AuCl4
ions were exposed to pyrrole vapor, one-step synthesized gold NPs and conducting polymer polypyrrole (PPy). The spiky gold NPs were obtained by controlling the thickness of P2VP brushes and reaction time, and a possible mechanism was proposed. The as-obtained spiky gold NPs could be used as substrates for surface-enhanced Raman scattering (SERS). They exhibited excellent Raman enhancement performance and the enhancement factor (EF) was in the range (4.0–6.2)  105 when 4-aminothiophenol was used as a probe molecule.