Sequential laser and ultrasonic wave generation of TiO2@Ag core-shell nanoparticles and their anti-bacterial properties
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- 作者：Abubaker Hassan Hamad ; Lin Li ; Zhu Liu ; Xiang Li Zhong…
- 关键词：TiO2@Ag core ; shell nanoparticles ; Ag ; TiO2 compound nanoparticles ; Laser ablation ; Antibacterial activity
- 刊名：Lasers in Medical Science
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：31
- 期：2
- 页码：263-273
- 全文大小：2,794 KB
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Lin Li (1)
Zhu Liu (2)
Xiang Li Zhong (2)
Tao Wang (3)
1. Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester, M13 9PL, UK
2. School of Materials, The University of Manchester, Manchester, M13 9PL, UK
3. Faculty of Medical and Human Sciences, The University of Manchester, Manchester, M13 9PL, UK - 刊物类别：Medicine
- 刊物主题：Medicine & Public Health
Medicine/Public Health, general
Dentistry
Laser Technology and Physics and Photonics
Quantum Optics, Quantum Electronics and Nonlinear Optics
Applied Optics, Optoelectronics and Optical Devices - 出版者：Springer London
- ISSN：1435-604X
文摘
Core-shell nanoparticles have unusual physical, chemical and biological properties. Until now, for the Ag and TiO2 combination, only Ag core and TiO2 shell nanoparticles have been practically demonstrated. In this investigation, novel TiO2@Ag core-shell (TiO2 core and Ag shell) nanoparticles were produced via ultrasonic vibration of Ag-TiO2 compound nanoparticles. A bulk Ti/Ag alloy plate was used to generate colloidal Ag-TiO2 compound nanoparticles via picosecond laser ablation in deionised water. The colloidal nanoparticles were then sonicated in an ultrasonic bath to generate TiO2@Ag core-shell nanoparticles. They were characterised using a UV-VIS spectrometer, transmission electron microscopy (TEM), high-angle annular dark-field-Scanning transmission electron microscopy (HAADF-STEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The Ag-TiO2 compound and the TiO2@Ag core-shell nanoparticles were examined for their antibacterial activity against Escherichia coli (E. coli) JM109 strain bacteria and compared with those of Ag and TiO2 nanoparticles. The antibacterial activity of the core-shell nanoparticles was slightly better than that of the compound nanoparticles at the same concentration under standard laboratory light conditions and both were better than the TiO2 nanoparticles but not as good as the Ag nanoparticles. Keywords TiO2@Ag core-shell nanoparticles Ag-TiO2 compound nanoparticles Laser ablation Antibacterial activity