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Protein-mediated synthesis of antibacterial silver nanoparticles deposited on titanium dioxide nanotube arrays |
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| Authors: | Yan-Yan Song Ting Yang Jing Cao Zhida Gao Robert P Lynch |
| Institution: | 1. College of Sciences, Northeastern University, Shenyang, 110004, China 2. Department of Physics and Energy, University of Limerick, Limerick, Ireland 3. Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland |
| Abstract: | We report on an effective route to decorate titanium nanotube arrays (TiNT) with silver nanoparticles (AgNPs). In this method, surface-adsorbed antibody molecules serve as templates to bind silver ions by electrostatic interaction. The photocatalytic activity of the TiNT under UV irradiation causes the photoreduction of AgNPs to occur, and the biological template is decomposed simultaneously. This route also was successfuly applied to gold nanoparticles (starting from negatively charged metallic precursor ions). Compared to undecorated samples, the AgNPs/TiNT samples under visible light display a much higher antibacterial activity against Escherichia coli. An effective protein-mediated route to decorate Ag nanoparticles (AgNPs) in TiO2 nanotube arrays (TiNT) is reported. The photocatalytic activity of the TiNT under UV irradiation causes the photoreduction of AgNPs to occur, and the biological template is decomposed simultaneously. Compared to undecorated samples, the AgNPs/TiNT samples under visible light display a much higher antibacterial activity against Escherichia coli. |
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