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Facile synthesis of SERS active Ag nanoparticles in the presence of tri-n-octylphosphine sulfide |
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| Authors: | Xiaomiao HouXiaoling Zhang Shutang ChenYan Fang Jilin YanNa Li Pengxu Qi |
| Institution: | a Key Laboratory of Cluster Science of Ministry of Education, Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, People's Republic of China b Beijing Key Laboratory for Nano-Photonics and Nano-Structure (NPNS), Capital Normal University, Beijing 100037, People's Republic of China c Department of Chemistry, Soochow University, Industrial Park, Suzhou 215123, People's Republic of China |
| Abstract: | 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. |
| Keywords: | Ag NPs Surfactant SERS |
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