NDLI: Generation of silver titania nanoparticles from an Ag–Ti alloy via picosecond laser ablation and their antibacterial activities

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Zhu Li, Lin Hamad, Abubaker Wang, Tao Liu, Hong Zhong, Xiang Li
Copyright Year	2015
Abstract	In this work, a bulk Ti/Ag alloy was used, for the first time, to produce Ag–TiO2 compound nanoparticles using picosecond laser ablation in deionised water. Spherical Ag–TiO2 compound nanoparticles with an average size of 31 nm were produced. They were characterised using UV-VIS spectrometry, transmission electron microscopy (TEM), High-Angle Annular Dark-Field-Scanning Transmission Electron Microscopy (HAADF-STEM), Energy Dispersive X-ray Spectroscopy (EDS), X-ray Photoelectron Spectroscopy (XPS) and X-ray Diffraction (XRD) methods to identify the nanoparticle size distribution, morphology, chemical composition, phase and surface properties. It was found that Ag-doped TiO2 nanoparticles were produced. The optical absorption spectra of the Ag–TiO2 compound nanoparticles shifted to longer wavelengths. The antibacterial activity of the Ag–TiO2 compound nanoparticles against Gram-negative Escherichia coli (E. coli) bacteria was examined and compared with those using laser generated Ag and TiO2 nanoparticles and distilled deionised water (as the control). It was found that the antibacterial activity of the Ag–TiO2 compound nanoparticles was better than laser generated TiO2 nanoparticles and chemically produced Ag nanoparticles, and was almost as good as laser generated Ag nanoparticles while Ag–TiO2 was used at a much lower Ag concentrations. The reason behind this is discussed.
Starting Page	72981
Ending Page	72994
Page Count	14
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	5
Issue Number	89
Journal	RSC Advances
DOI	10.1039/c5ra16466d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Energy-dispersive X-ray spectroscopy Nanoparticle Escherichia coli coli Laser ablation X-ray crystallography Picosecond Scanning Transmission Electron Microscopy Transmission electron microscopy Diffraction Laser Bacteria Gram-negative bacteria
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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