期刊
APPLIED SURFACE SCIENCE
卷 257, 期 11, 页码 4935-4940出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.12.154
关键词
Ag; NPs; Surfactant; SERS
类别
资金
- National Nature Science Foundation of China [20975012]
- 111 Project in China [B07012]
A facile and novel way was reported here for the synthesis of hydrophobic Ag nanoparticles (NPs), using AgNO3, tri-n-octylphosphine (TOP) and sulfur (S) powder in process. TOP was used as solvent, reducing agent and stabilizer. S could chelate with excessive TOP to form trioctylphosphine sulfide (TOPS), which served as second capping agent. The hydrophobic Ag NPs could be transformed into hydrophilic state through ligand exchange. Furthermore, surface-enhanced Raman scattering (SERS) spectra of 4-aminothiophenol (4-ATP) were obtained on the hydrophobic and hydrophilic Ag NPs modified substrates, indicating that the as-synthesized Ag NPs had great potential for high sensitive optical detection applications. (C) 2011 Elsevier B.V. All rights reserved.
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