Vol.4 No.2 (May 2014)
Prolonged Antimicrobial Activity of Unique Sandwich-Structured Silver Nanocomposites
In this study, silver nanocomposites with three different structures were prepared to confirm that structure has a significant influence on the antibacterial properties. Ag nanoparticles were prepared by the following three methods: 1) by deposition of Ag on the surface of silica-polydopamine spheres by reducing Ag cations (SiO2/PD/Ag); 2) by encapsulation of Ag NPs in mesoporous SiO2 with a core- shell structure (Ag@MSN); and 3) Ag nanocrystals were both decorated on the surface of SiO2 and incorporated into its mesoporous structure (Ag@MSN/PD-Ag). The antibacterial activities of these particles were evaluated through bacterial growth curves. The results demonstrated that in the first three days, the effect of SiO2/PD/Ag was more intense on V. natriegens compared with Ag@MSN; however, the next seven days revealed the opposite result. Therefore, Ag@MSN/PD-Ag exhibited the most effective antimicrobial treatments for ten days.
宋 笑 , 刘 涛 , 董丽华 , 郭章伟 , 董耀华 , 申媛媛 (2014) 夹心层结构的纳米银复合粒子的缓释抑菌性。 纳米技术， 4， 17-22. doi: 10.12677/NAT.2014.42004
 Jankiewicz, B.J., Jamiola, D., Choma, J., Jaroniec, M. (2012) Silica-metal core-shell nanostructures. Advances in Colloid and Interface Science, 170, 28-47.
 Taglietti, A., Diaz Fernandez, Y.A., Amato, E., Cucca, L., Dacarro, G., et al. (2012) Antibacterial activity of glutathione-coated silver nanoparticles against gram positive and gram negative bacteria. Langmuir, 28, 8140-8148.
 Zhang, L., Wu, J.J., Wang, Y.X., Long, Y.H., Zhao, N. and Xu, J. (2012) Combination of bioinspiration: A general route to superhydrophobic particles. Journal of the American Chemical Society, 134, 9879-9881.
 Ivanova, T., Harizanova, A., Koutzarova, T., Vertruyen, B. (2013) Optical and Structural Characterization of TiO2 Films Doped with Silver Nanoparticles Obtained by Sol-Gel Method. Optical Materials, 36, 207-213.
 Sahoo, S., Husale, S., karna, S., Nayak, S.K. (2011) Controlled assembly of Ag nanoparticles and carbon nanotube hybrid structures for biosensing. Journal of the American Chemical Society, 133, 4005-4009.
 Niu, A., Han, Y.J., Wu, J., Yu, N., Xu, Q. (2010)) Synthesis of one-dimensional carbon nanomaterials wrapped by silver nanoparticles and their antibacterial behavior. The Journal of Physical Chemistry C, 114, 12728-12735.
 Kong, H. and Jang, J. (2008) Antibacterial properties of novel poly (methyl methacrylate) nanofiber containing silver nanoparticles. Langmuir, 24, 2051-2056.
 Kong, H. and Jang, J. (2008) Synthesis and antimicrobial properties of novel silver/polyrhodanine nanofibers. Biomacromolecules, 9, 2677-2681.
 Tang, J., Chen, Q., Xu, L., Zhang, S., Feng, L.Z., Xu, H. (2013) Graphene oxide-silver nanocomposite as a highly effective antibacterial agent with species-specific mechanisms. ACS Applied Materials Interfaces, 5, 3867-3874.
 Xu, W.P, Zhang, L.C., Li, J.P., Lu, Y. and Li, H.H. (2011) Facile synthesis of silver@graphene oxide nanocomposites and their enhanced antibacterial properties. Journal of Materials Chemistry, 21, 4593-4597.
 Kobayashi, Y., Salgueirino-Maceira, V. and Liz-Marzan, L.M. (2001) Deposition of silver nanoparticles on silica spheres by pretreatment steps in electroless plating. Chemistry of Materials, 13, 1630-1633.
 Tang, S.C., Tang, Y.F., Zhu, S.P., Lu, H.M. and Meng, X.K. (2007) Synthesis and characterization of silica silver core shell composite particles with uniform thin silver layers. Journal of Solid State Chemistry, 180, 2871-2876.
 Graf, C. and von Blaaderen, A. (2002) Metallodielectric colloidal core-shell particles for photonic applications. Langmuir, 18, 524-534.
 Cassagneau, T. and Caruso, F. (2002) Contiguous silver nanoparticle coatings on dielectric spheres. Advanced Materials, 14, 732-736.
 Lee, H., Dellatore, S.M., Miller, W.M. and Messersmith, P.B. (2007) Mussel-inspired surface chemistry for multifunctional coatings. Science, 318, 426-430.
 Sagert, J., Sun, C.J. and Waite, J.H. (2006) Chemical subtleties of mussel and polychaete holdfasts. Biological Ad- hesives, 125-143.