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首页> 外文期刊>Applied Surface Science >Antibacterial effects, biocompatibility and electrochemical behavior of zinc incorporated niobium oxide coating on 316L SS for biomedical applications
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Antibacterial effects, biocompatibility and electrochemical behavior of zinc incorporated niobium oxide coating on 316L SS for biomedical applications

机译：316L SS上掺锌的氧化铌涂层的生物医学应用的抗菌效果，生物相容性和电化学行为

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摘要

In the present study, Nb2O5 (NZ0) composite coatings with various concentrations of zinc (NZ2, NZ4 & NZ6) are produced on 316L SS by sol-gel method with the aim of improving its antibacterial activity, bone formability and corrosion resistance properties. This work studied the surface characterization of NZ0, NZ2, NZ4 & NZ6 coated 316L SS by ATR-FTIR, XRD, HR-SEM with EDAX. The synthesized coatings were different in the morphological aspects, NZ0 shows mesoporous morphology whereas irregular cluster like morphology was observed for the zinc incorporated coatings. The chemical composition of the NZ0 and NZ4 composite coatings were studied by XPS and the results revealed that the zinc exist as ZnO and Nb as Nb2O5 in the coatings. The increase in the concentration of zinc in Nb2O5 increases the hydrophilic nature identified by water contact angle studies. The potentiodynamic polarization studies in simulated body fluid reveals the increase in polarization resistance with decrease in current density (i(corr)) and electrochemical impedance spectroscopic studies with increase in charge transfer resistance (R-ct) and double layer capacitance (Q(dl)) were observed for NZ4 coated 316L SS. The inhibition of Staphylococcus aureus and Escherichia coli bacteria were identified for NZ4 coated 316L SS by bacterial viability studies. The NZ4 coated 316L SS showed better Osseo-integration by spreading the MG 63 osteoblast cells. The study results imply that zinc incorporated Nb2O5 (NZ4) composite coating exhibits antibacterial activity and also enhance the corrosion resistance and biocompatibility of the 316L SS. (C) 2017 Published by Elsevier B.V.
机译：在本研究中，通过溶胶-凝胶法在316L SS上制备了各种浓度的锌（NZ2，NZ4和NZ6）的Nb2O5（NZ0）复合涂层，目的是提高其抗菌活性，骨形成性和耐腐蚀性。这项工作通过ATR-FTIR，XRD，HR-SEM和EDAX研究了NZ0，NZ2，NZ4和NZ6涂层316L SS的表面特性。合成的涂层在形态方面是不同的，NZ0显示出中孔形态，而掺锌涂层观察到不规则的簇状形态。通过XPS对NZ0和NZ4复合涂层的化学成分进行了研究，结果表明涂层中锌以ZnO的形式存在，Nb以Nb2O5的形式存在。 Nb2O5中锌浓度的增加增加了通过水接触角研究确定的亲水性。在模拟体液中进行的电位动力学极化研究揭示了极化电阻随电流密度（i（corr））的降低而增加，电化学阻抗光谱研究表明电荷转移电阻（R-ct）和双层电容（Q（dl））的增加对于NZ4包被的316L SS观察到）。通过细菌生存力研究确定了NZ4包被的316L SS对金黄色葡萄球菌和大肠杆菌细菌的抑制作用。涂有NZ4的316L SS通过扩散MG 63成骨细胞显示出更好的骨整合性。研究结果表明，掺锌的Nb2O5（NZ4）复合涂层具有抗菌活性，并且还增强了316L SS的耐腐蚀性和生物相容性。 （C）2017由Elsevier B.V.发布

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