Journal
LANGMUIR
Volume 26, Issue 18, Pages 14806-14813Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la102994g
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Funding
- National Nature Science Foundation of China [20874069, 50803044, 20974071, 20904036]
- Specialized Research Fund for the Doctoral Program of Higher Education [200802850005]
- Qing Lan Project
- Soochow University
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Polymer-encapsulated gold or silver nanoparticles were synthesized and sterically stabilized by a shell layer of poly(4-vinylpyridine) (P4VP) grafted on SiO2 nanoparticles that acts as a scaffold for the synthesis of hybrid noble metal nanomaterials The grafting P4VP shell was synthesized via surface reversible addition-fragmentation chain transfer (RAFT) polymerization of 4-vinylpyridine (4VP) using SiO2-supported benzyl 9H-carbazole-9-carbodithioate (SiO2-BCBD) as the RAFT agent The covalently tethered P4VP shell can coordinate with various transition metal ions such as Au3+ or Ag+ and therefore stabilize the corresponding Au or Ag nanoparticles reduced in situ by sodium borohydride (NaBH4) or trisodium citrate The SiO2-supported RAFT agent and the Au or Ag nanoparticles embedded in the P4VP shell layer were characterized by UV-vis spectrophotometer, X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and surface-enhanced Raman spectroscopy (SERS)
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