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Preparation and Antibacterial Properties of the Core-Shell Structure [email protected] Nanoparticles

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The core-shell structure [email protected] nanoparticles were synthesized by a facile chemical reduction method. Firstly, the mercapto- silica spheres had been prepared by the stober method, in which 3-mercaptopropyltrimethoxysilane (MPS) was used as a sole silica source. The reaction involves mixing the MPS precursor, ammonia in aqueous solvent at room temperature. Secondly, the core-shell structure [email protected] nanoparticles were synthesized by reducing AgNO3 on the surface of mercapto-silica spheres in the presence of the reducing agent. The core-shell structure [email protected] nanoparticles were investigated by means of ultraviolet–visible absorption spectroscopy (UV-vis), high resolution transmission electron microscopy (HRTEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Antibacterial properties of the as-synthesized [email protected] nanoparticles were investigated using both Gram negative of Escherichia coli (E. coli) and Gram positive of Staphylococcus aureus (S. aureus) as bacterial strains. The results show that the coreshell structure [email protected] nanoparticles exhibit excellent antibacterial properties against E. coli and S. aureus bacteria.
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Keywords: Antibacterial properties; [email protected]; chemical reduction; core-shell structure; mercapto-silica spheres; synthesis

Document Type: Research Article

Publication date: 2012-12-01

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  • Current Nanoscience publishes authoritative reviews and original research reports, written by experts in the field on all the most recent advances in nanoscience and nanotechnology. All aspects of the field are represented including nano- structures, synthesis, properties, assembly and devices. Applications of nanoscience in biotechnology, medicine, pharmaceuticals, physics, material science and electronics are also covered. The journal is essential to all involved in nanoscience and its applied areas.
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