Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
Nuclear Agriculture & Bio-Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Aug 14;129:121-4. doi: 10.1016/j.saa.2014.03.032. Epub 2014 Mar 27.
The present study reports an environmental friendly method for the synthesis of silver nanoparticles (Ag NPs) using an aqueous extract of Acacia auriculiformis that acts as reducing agent as well as capping agent. The obtained NPs were characterized by UV-vis absorption spectroscopy and showed a sharp surface plasmon absorption band at ∼400 nm. Fourier transform infrared spectroscopy (FTIR) showed nanoparticles were capped with plant compounds. Transmission electron microscopy (TEM) showed that the particles were spherical in nature with diameter ranging from 20 to 150 nm depending on the pH of the solution. The as-synthesized Ag NPs showed antibacterial activity against both Gram negative and Gram positive bacteria with more efficacy against Gram negative bacteria.
本研究报告了一种使用金合欢（Acacia auriculiformis）水提物作为还原剂和稳定剂合成银纳米粒子（Ag NPs）的环保方法。所得纳米粒子通过紫外-可见吸收光谱进行了表征，并在约 400nm 处表现出尖锐的表面等离子体吸收带。傅里叶变换红外光谱（FTIR）表明纳米粒子被植物化合物覆盖。透射电子显微镜（TEM）表明，根据溶液 pH 值的不同，粒子呈球形，直径范围为 20 至 150nm。所合成的 Ag NPs 对革兰氏阴性和革兰氏阳性菌均具有抗菌活性，对革兰氏阴性菌的效果更强。
