Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 11, Pages 4935-4940Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.12.154
Keywords
Ag; NPs; Surfactant; SERS
Categories
Funding
- National Nature Science Foundation of China [20975012]
- 111 Project in China [B07012]
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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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