Biosynthesis of nanoparticles using microbes-A review

被引:484
作者
Hulkoti, Nasreen I. [1 ]
Taranath, T. C. [1 ]
机构
[1] Post Grad Dept Bot, Dharwad 580003, Karnataka, India
关键词
Biosynthesis; Nanoparticles; Nitrate reductase; Extracellular; Intracellular; MONODISPERSE GOLD NANOPARTICLES; FUNGUS-MEDIATED SYNTHESIS; SILVER NANOPARTICLES; EXTRACELLULAR BIOSYNTHESIS; BIOLOGICAL SYNTHESIS; METAL NANOPARTICLES; ASPERGILLUS-NIGER; CDS NANOPARTICLES; ESCHERICHIA-COLI; AUCL4-IONS;
D O I
10.1016/j.colsurfb.2014.05.027
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
The biosynthesis of nanoparticles by microorganism is a green and eco-friendly technology. This review focuses on the use of consortium of diverse microorganisms belonging to both prokaryotes and eukaryotes for the synthesis of metallic nanoparticles viz, silver, gold, platinum, zirconium, palladium, iron, cadmium and metal oxides such as titanium oxide, zinc oxide, etc. These microorganisms include bacteria, actinomycetes, fungi and algae. The synthesis of nanoparticles may be intracellular or extracellular. The several workers have reported that NADH dependent nitrate reductase enzyme plays a vital role in the conversion of metallic ions to nanoparticles. The FTIR study reveals that diverse biomolecules viz, carboxyl group, primary and secondary amines, amide I, II, and III bands etc serve as a tool for bioreduction and capping agents there by offering stability to particles by preventing agglomeration and growth. The size and shape of the nanoparticles vary with the organism employed and conditions employed during the synthesis which included pH, temperature and substrate concentration. The microorganisms provide diverse environment for biosynthesis of nanoparticles. These particles are safe and eco-friendly with a lot of applications in medicine, agriculture, cosmetic industry, drug delivery and biochemical sensors. The challenges for redressal include optimal production and minimal time to obtain desired size and shape, to enhance the stability of nanoparticles and optimization of specific microorganisms for specific application. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:474 / 483
页数:10
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