期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 1035, 期 -, 页码 471-475出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molstruc.2012.12.023
关键词
Gelatin; Copper nanoparticles; Bimetallic nanoparticles; SERS
资金
- Linyi science and technology development plan
- National Natural Science Foundation of China [50772048]
- R&D Foundation of Jiangsu Province of China [JHB 06-04]
The present study demonstrates a facile process for the production of spherical-shaped Cu and Ag nanoparticles synthesized and stabilized by hydrazine and gelatin, respectively. Advantages of the synthetic method include its production of water dispersible copper and copper/silver nanoparticles at room temperature under no inert atmosphere. The resulting nanoparticles (copper or copper/silver) are investigated by X-ray diffraction (XRD), UV-vis spectroscopy, and transmission electron microscopy (TEM). The nanometallic dispersions were characterized by surface plasmon absorbance measuring at 420 and 572 nm for Ag and Cu nanoparticles, respectively. Transmission electron microscopy showed the formation of nanoparticles in the range of similar to 10 nm (silver), and similar to 30 nm (copper). The results also demonstrate that the reducing order of Cu2+/Ag+ is important for the formation of the bimetallic nanoparticles. The surface-enhanced Raman scattering effects of copper and copper/silver nanoparticles were also displayed. It was found that the enhancement ability of copper/silver nanoparticles was little higher than the copper nanoparticles. (c) 2012 Elsevier B.V. All rights reserved.
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