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首页> 外文期刊>RSC Advances >Synthesis of copper-silver bimetallic nanopowders for a biomedical approach; study of their antibacterial properties
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Synthesis of copper-silver bimetallic nanopowders for a biomedical approach; study of their antibacterial properties

机译：用于生物医学方法的铜银双金属纳米粉粉的合成; 研究其抗菌性能

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摘要

Copper-silver nanopowders (NPs) are synthesized using a combination of sonoelectrodeposition for the inner core and galvanic replacement reaction for the outer shell. These combined techniques provide pure copper core NPs and allow the replacement of the surface copper atoms by silver atoms. The different Cu-Ag NPs are characterized by transmission electron microscopy, centrifugal liquid sedimentation, X-ray diffraction, X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy. The diameter of NPs is approximately equal to 7 nm. X-ray photoelectron spectroscopy results tend to support a core-shell structure. The bactericidal properties of these NPs are tested against both Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) bacteria. The efficiency of these NPs seems essentially due to the release of Cu2+ and Ag+ ions. The study of different compositions of Cu-Ag NPs exhibits a good compromise against both S. aureus and E. coli when the silver atomic percentage is superior to 40%. Finally, tests of wound dressings impregnated with Cu50Ag50 NP are performed and exhibit successfully their bactericidal properties.
机译：使用外壳的内芯和电流置换反应的声学电极组合合成铜 - 银纳米粉末（NPS）。这些组合技术提供纯铜芯NPS，并允许通过银原子更换表面铜原子。不同的Cu-Ag NPS的特征在于透射电子显微镜，离心液沉降，X射线衍射，X射线光电子能谱和能量分散X射线光谱。 NPS的直径大约等于7nm。 X射线光电子能谱结果倾向于支持核心壳结构。将这些NPS的杀菌性能对金黄色葡萄球菌（革兰氏阳性）和大肠杆菌（革兰氏阴性）细菌进行测试。这些NPS的效率基本上是由于Cu2 +和Ag +离子的释放。当银原子百分比优于40％时，Cu-Ag NPS的不同组合物的研究表现出对S.UUREUS和大肠杆菌的良好折衷。最后，进行了浸渍有Cu50Ag50nP的伤口敷料的试验，并成功地表现出它们的杀菌性质。

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  • 来源
    《RSC Advances》 |2016年第56期|共8页
  • 作者

    Rousse Celine; Josse Jerome; Mancier Valerie; Levi Samuel; Gangloff Sophie C.; Fricoteaux Patrick;

  • 作者单位

    Univ Reims LISM EA 4695 UFR Sci Exactes &

    Nat Reims France;

    Univ Reims BIOS EA 4691 UFR Pharm Reims France;

    Univ Reims LISM EA 4695 UFR Sci Exactes &

    Nat Reims France;

    Univ Reims LISM EA 4695 UFR Sci Exactes &

    Nat Reims France;

    Univ Reims BIOS EA 4691 UFR Pharm Reims France;

    Univ Reims LISM EA 4695 UFR Sci Exactes &

    Nat Reims France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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