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Remarkable bactericidal traits of a metal-ceramic composite coating elated by hierarchically structured surface

机译:通过分层结构表面升高的金属陶瓷复合涂层的显着杀菌性状

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摘要

A ceramic-based coating with a hierarchical surface structure was synthesized via solid-state reaction enabled by a double cathode glow discharge technique. This innovative coating comprises two distinct layers, specifically an outer layer with a well-aligned micro-pillar array and a dense inner layer. Both are composed of a face-centered cubic Cu(Co,Ni,Fe) solid solution phase together with a spinel-type Fe(Al,Cr)2O4 oxide. This coating exhibits superhydrophobicity and, yet, a very strong adhesion to water, i.e., the so-called “rose petal effect”. This coating also exhibits highly efficient antibacterial ability against both Staphylococcus aureus and Escherichia coli bacteria under both dark and visible light conditions. The excellent antibacterial property originates from the synergistic effects through the release of Cu ions coupled with photothermal activity upon light activation.
机译:通过通过双阴极辉光放电技术的固态反应合成具有层级结构的陶瓷基涂层。这种创新的涂层包括两个不同的层,特别是具有良好对准的微柱阵列和致密内层的外层。两者都与朝向立方Cu(CO,Ni,Fe)固溶体与尖晶石型Fe(Al,Cr)2O4氧化物组成。该涂层表现出超细侵害,但是,对水的粘附非常强烈,即所谓的“玫瑰花瓣效应”。该涂层还表现出在深色和可见光条件下对金黄色葡萄球菌和大肠杆菌菌的高效抗菌能力。优异的抗菌性能通过在光活化的光热活性释放Cu离子来源于协同作用。

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