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首页> 美国卫生研究院文献>International Journal of Biomaterials >Modeling and Synthesis of Ag and Ag/Ni Allied Bimetallic Nanoparticles by Green Method: Optical and Biological Properties
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Modeling and Synthesis of Ag and Ag/Ni Allied Bimetallic Nanoparticles by Green Method: Optical and Biological Properties

机译：绿色方法对Ag和Ag / Ni相关双金属纳米粒子的建模与合成：光学和生物学特性

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摘要

In the quest for environmental remediation which involves eco-friendly synthetic routes, we herein report synthesis and modeling of silver nanoparticles (Ag NPs) and silverickel allied bimetallic nanoparticles (Ag/Ni NPs) using plant-extract reduction method. Secondary metabolites in the leaf extract of Canna indica acted as reducing agent. Electronic transitions resulted in emergence of surface plasmon resonance in the regions of 416 nm (Ag NPs) and 421 nm (Ag/Ni NPs) during optical measurements. Further characterizations were done using TEM and EDX. Antimicrobial activity of the nanoparticles against clinical isolates was highly significant as P < 0.05. These findings suggest application of Ag NPs as antibacterial agent against E. coli, S. pyogenes, and antifungal agent against C. albicans. Possible antibacterial drugs against S. pyogenes and E. coli can also be designed using Ag/Ni nanohybrid based on their strong inhibition activities. Similarly, the enhanced SPR in the nanoparticles is suggested for applications in optical materials, as good absorbers and scatters of visible light. Theoretical model clarified that the experiment observation on the relationship between metallic nanoparticles penetration through peptidoglycan layers and the activeness of microbial species depends on the nature of the nanoparticles and pore size of the layer.
机译：在寻求涉及生态友好的合成途径的环境修复的过程中，我们在此报告了使用植物提取物还原法对银纳米颗粒（Ag NPs）和银/镍联合双金属纳米颗粒（Ag / Ni NPs）进行合成和建模。 anna叶提取物中的次生代谢产物充当还原剂。电子跃迁导致在光学测量期间在416 nm（Ag NPs）和421 nm（Ag / Ni NPs）区域出现表面等离子体共振。使用TEM和EDX进行了进一步的表征。纳米颗粒对临床分离物的抗菌活性非常显着，P <0.05。这些发现暗示了Ag NPs作为针对大肠杆菌，化脓性链球菌的抗菌剂和针对白色念珠菌的抗真菌剂的应用。基于Ag / Ni纳米杂化物的强大抑制活性，也可以设计可能的针对化脓性链球菌和大肠杆菌的抗菌药物。类似地，建议将纳米颗粒中增强的SPR用作光学材料，作为可见光的良好吸收剂和散射剂。理论模型阐明，对金属纳米颗粒通过肽聚糖层的渗透与微生物物种活性之间关系的实验观察取决于纳米颗粒的性质和层的孔径。

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