Department of Physics, Panjab University, Chandigarh, 160014, India.
Department of Microbial Biotechnology, Panjab University, Chandigarh, 160014, India.
Environ Sci Pollut Res Int. 2017 Sep;24(25):20429-20437. doi: 10.1007/s11356-017-9630-0. Epub 2017 Jul 13.
The effect of silver nanoparticle anisotropy on the antibacterial properties has been studied against Escherichia coli, Staphylococcus aureus, Bacillus, Vibrio cholerae, and Streptococcus pyogenes. Anisotropic silver nanoparticles have been synthesized by solvothermal process. The UV-visible absorption, X-ray diffraction, and TEM studies show the anisotropic nature of silver nanoparticles. The results demonstrate that the anisotropic silver nanoparticles undergo a shape-dependent interaction with the bacteria, and the nanoparticles with higher anisotropy exhibit the superior antibacterial activity. Silver nanoparticles with sharp edges and corners displayed the stronger biocidal action, in comparison to the anisotropic nanoparticles with round edges and corners. The sharpness of the corners has been quantified using degree of truncation method. The variation in degree of truncation and the antibacterial activity follows the same pattern.
已研究了银纳米粒子各向异性对大肠杆菌、金黄色葡萄球菌、芽孢杆菌、霍乱弧菌和化脓链球菌的抗菌性能的影响。采用溶剂热法合成了各向异性银纳米粒子。紫外-可见吸收、X 射线衍射和 TEM 研究表明了银纳米粒子的各向异性。结果表明，各向异性银纳米粒子与细菌发生了依赖于形状的相互作用，各向异性更高的纳米粒子表现出更好的抗菌活性。具有锐利边缘和角的银纳米粒子显示出更强的杀菌作用，而具有圆形边缘和角的各向异性纳米粒子则较弱。使用截断度方法量化了角的尖锐度。截断度的变化和抗菌活性遵循相同的模式。
