Ashokkumar S, Ravi S, Kathiravan V, Velmurugan S
Department of Physics, Annamalai University, Annamalainagar 608002, Tamil Nadu, India.
Department of Engg. Physics, Annamalai University, Annamalainagar 608002, Tamil Nadu, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Jan 5;134:34-9. doi: 10.1016/j.saa.2014.05.076. Epub 2014 Jun 21.
Green synthesis of silver nanoparticles has been achieved using environmentally acceptable plant extract. It is observed that Abutilon indicum leaf extract can reduce silver ions into silver nanoparticles within 15 min of reaction time. The formation and stability of the reduced silver nanoparticles in the colloidal solution were monitored by UV-Vis spectrophotometer analysis. The mean particle diameter of silver nanoparticles was calculated from the XRD pattern. FT-IR spectra of the leaf extract after the development of nanoparticles are determined to allow identification of possible functional groups responsible for the conversion of metal ions to metal nanoparticles. The AgNPs thus obtained showed highly potent antibacterial activity toward Gram-positive (Staphyloccocus aureus and Bacillus subtilis) and Gram-negative (Salmonella typhi and Escherichia coli) microorganisms.
已使用环境友好型植物提取物实现了银纳米颗粒的绿色合成。据观察，苘麻叶提取物可在15分钟的反应时间内将银离子还原为银纳米颗粒。通过紫外可见分光光度计分析监测胶体溶液中还原银纳米颗粒的形成和稳定性。根据X射线衍射图谱计算银纳米颗粒的平均粒径。测定纳米颗粒形成后叶提取物的傅里叶变换红外光谱，以确定可能负责将金属离子转化为金属纳米颗粒的官能团。由此获得的银纳米颗粒对革兰氏阳性菌（金黄色葡萄球菌和枯草芽孢杆菌）和革兰氏阴性菌（伤寒沙门氏菌和大肠杆菌）表现出高效的抗菌活性。
