锡兰肉桂树皮提取物和粉末介导的纳米晶银颗粒的绿色合成及其杀菌活性。

Cinnamon zeylanicum bark extract and powder mediated green synthesis of nano-crystalline silver particles and its bactericidal activity.

作者信息

Sathishkumar M, Sneha K, Won S W, Cho C-W, Kim S, Yun Y-S

机构信息

Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Research Institute of Industrial Technology, Chonbuk National University, Jeonju 561-756, Republic of Korea.

出版信息

Colloids Surf B Biointerfaces. 2009 Oct 15;73(2):332-8. doi: 10.1016/j.colsurfb.2009.06.005. Epub 2009 Jun 10.

DOI:10.1016/j.colsurfb.2009.06.005

PMID:19576733

Abstract

The exploitation of various plant materials for the biosynthesis of nanoparticles is considered a green technology as it does not involve any harmful chemicals. The present study reports the synthesis of silver (Ag) nanoparticles from silver precursor using the bark extract and powder of novel Cinnamon zeylanicum. Water-soluble organics present in the plant materials were mainly responsible for the reduction of silver ions to nano-sized Ag particles. TEM and XRD results confirmed the presence of nano-crystalline Ag particles. The pH played a major role in size control of the particles. Bark extract produced more Ag nanoparticles than the powder did, which was attributed to the large availability of the reducing agents in the extract. Zeta potential studies showed that the surface charge of the formed nanoparticles was highly negative. The EC(50) value of the synthesized nanoparticles against Escherichia coli BL-21 strain was 11+/-1.72 mg/L. Thus C. zeylanicum bark extract and powder are a good bio-resource/biomaterial for the synthesis of Ag nanoparticles with antimicrobial activity.

摘要

利用各种植物材料进行纳米粒子的生物合成被认为是一种绿色技术，因为它不涉及任何有害化学物质。本研究报道了使用新型锡兰肉桂的树皮提取物和粉末，从银前驱体合成银（Ag）纳米粒子。植物材料中存在的水溶性有机物主要负责将银离子还原为纳米尺寸的Ag颗粒。透射电子显微镜（TEM）和X射线衍射（XRD）结果证实了纳米晶Ag颗粒的存在。pH值在颗粒尺寸控制中起主要作用。树皮提取物比粉末产生更多的Ag纳米粒子，这归因于提取物中还原剂的大量存在。zeta电位研究表明，形成的纳米粒子的表面电荷高度为负。合成的纳米粒子对大肠杆菌BL-21菌株的EC(50)值为11±1.72 mg/L。因此，锡兰肉桂树皮提取物和粉末是合成具有抗菌活性的Ag纳米粒子的良好生物资源/生物材料。