Enhanced antibacterial activity of copper/copper oxide nanowires prepared by pulsed laser ablation in water medium

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• 作者：R. K. Swarnkar ; J. K. Pandey ; K. K. Soumya ; P. Dwivedi ; S. Sundaram…
• 刊名：Applied Physics A: Materials Science & Processing
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：122
• 期：7
• 全文大小：1,149 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics<br>Condensed Matter<br>Optical and Electronic Materials<br>Nanotechnology<br>Characterization and Evaluation Materials<br>Surfaces and Interfaces and Thin Films<br>Operating Procedures and Materials Treatment<br>
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0630
• 卷排序：122

文摘

Copper/copper oxide nanowires (NWs) are well known for its antibacterial activity against various pathogens. In the present study, we have shown the enhanced antibacterial activity of the NWs against gram-negative bacterial strains (Escherichia coli, Pseudomonas aeruginosa and Salmonella typhi) and gram-positive bacterial strains (Bacillus subtilis and Staphylococcus aureus). The increase in the activity is because of the shape and size of the colloidal NWs which were prepared at room temperature in a one-step process by pulsed laser ablation of copper metal target. The purity, shape and size of the colloidal NWs were well characterized by UV–visible absorption spectroscopy and transmission electron microscopy (TEM). The NWs were of diameters in the range of 15–30 nm and lengths ranging from 200 to 600 nm. The dose-dependent antibacterial activity of these NWs was found to be more effective against gram-negative bacteria compared to gram-positive bacteria. As gram-negative bacteria have thinner layer of cell wall made up of peptidoglycan possibly which makes them more susceptible to Cu/Cub>2b>O NWs, Cu/Cub>2b>O NWs can be a potent candidate to be used as bactericidal or as growth inhibitor.