期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 29, 期 6, 页码 1984-1989出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2009.03.015
关键词
Silver nanoparticles; Polystyrene; Core-shell nanoparticles; Ionic liquid; Antimicrobial activity
资金
- Nature Science Foundation of Hebei Province [E2008000699]
Uniform silver nanoparticles and silver/polystyrene core-shell nanoparticles were successfully synthesized in a room temperature ionic liquid, 1-n-butyl-3-methylimidazolium tetra fluoroborate ([BMIM]center dot BF4). [BMIM]center dot BF4 plays a protective role to prevent the nanoparticles from aggregation during the preparation process. Transmission electron micrographs confirm that both silver nanoparticles and core-shell nanoparticles are regular spheres with the sizes in the range of 5-15 nm and 15-25 nm, respectively. The X-ray diffraction analysis reveals the face-centered cubic geometry of silver nanoparticles. The as-prepared nanoparticles were also characterized by Fourier transform infrared spectroscopy, Raman spectroscopy, UV-vis diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy. In addition, antimicrobial activities against E. coli and S. aureus were studied and the results show that both silver nanoparticles and core-shell nanoparticles possess excellent antimicrobial activities. The antimicrobial mechanism of the as-prepared nanoparticles was discussed. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
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