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首页> 外文期刊>ACS applied materials & interfaces >Antibacterial and Bioactive Coatings Based on Radio Frequency Co-Sputtering of Silver Nanocluster-Silica Coatings on PEEK/Bioactive Glass Layers Obtained by Electrophoretic Deposition
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Antibacterial and Bioactive Coatings Based on Radio Frequency Co-Sputtering of Silver Nanocluster-Silica Coatings on PEEK/Bioactive Glass Layers Obtained by Electrophoretic Deposition

机译：通过电泳沉积获得的PEEK /生物活性玻璃层上银纳米粉 - 二氧化硅涂层射频和生物活性涂层

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摘要

Bioactive and antibacterial coatings on stainless steel substrates were developed and characterized in this study. Silver nanocluster-silica composite coatings of 60-150 nm thickness were deposited using radio frequency (RF) co-sputtering on PEEK/bioactive glass (BG) layers (of 80-90 m thickness) which had been electrophoretically deposited onto stainless steel. Two sputtering conditions were used by varying the deposition time (15 and 40 min); the resulting microstructure, composition, adhesion strength, in vitro bioactivity, and antibacterial activity were investigated. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and energy dispersive spectroscopy (EDX) confirmed the presence of silver nanoclusters, which were homogeneously embedded in the silica matrix. The isoelectric point of the coatings and their charge at physiological pH were determined by zeta potential measurements. The presence of BG particles in the PEEK/BG layer allows the coatings to form apatite-like crystals upon immersion in simulated body fluid (SBF). Moreover, silver nanoclusters embedded in the silica matrix as a top layer provided an antibacterial effect against Escherichia coli and Staphylococcus carnosus.
机译：在本研究开发并表征了不锈钢基材上的生物活性和抗菌涂层。使用电泳沉积在不锈钢上的PEEK /生物活性玻璃（BG）层（BG）层（厚度）上溅射沉积60-150nm厚度的银纳米烷基涂层的二氧化硅复合涂层60-150nm厚的涂层。通过改变沉积时间（15至40分钟）来使用两个溅射条件;研究了所得的微观结构，组成，粘合强度，体外生物活性和抗菌活性。扫描电子显微镜（SEM），X射线光电子能谱（XPS）和能量色散光谱（EDX）证实存在银纳米能器，其均匀地嵌入二氧化硅基质中。通过Zeta电位测量测定涂层的等电点及其在生理pH下的电荷。 PEEK / BG层中的BG颗粒的存在允许涂层在浸入模拟体液（SBF）时形成磷灰石状晶体。此外，作为顶层嵌入二氧化硅基质中的银纳米能器提供了针对大肠杆菌和葡萄球菌的抗菌作用。

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