Production and structural characterization of crystalline silver nanoparticles from Bacillus cereus isolate
Production and structural characterization of crystalline silver nanoparticles from Bacillus cereus isolate
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DOI：
10.1016/j.colsurfb.2009.07.016
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发表时间：
2009-11-01
影响因子：
5.8
通讯作者：
Gunasekaran, R.
中科院分区：
文献类型：
--
作者：
Babu, M. M. Ganesh;Gunasekaran, R.
迄今为止，已经使用细菌和真菌深入研究了金属纳米颗粒的生物合成。我们从电镀工业中分离鉴定了耐金属细菌，它们产生银纳米颗粒。硝酸银水溶液与细菌生物质的还原反应进行120 h。细菌产生的金属纳米颗粒在420 nm附近的表面等离子体共振波长处显示出强吸收。这些纳米颗粒的尺寸和形态通常使用高分辨率透射电子显微镜成像，颗粒尺寸范围在4和5nm之间，并且形状为球形。用X射线衍射仪对颗粒的晶体结构进行了表征。X射线衍射半峰全宽表明，该颗粒表现出面心立方相。(c)2009 Elsevier B.V.保留所有权利。
To date, biosynthesis of metal nanciparticles has been intensively studied using bacteria and fungi. We have isolated and identified metal resistant bacterial strains from electroplating industries, they produce silver nanciparticles. The reduction reaction of aqueous silver nitrate with bacterial biomass was carried out for 120 h. Bacteria produced metallic nanciparticles showed a strong absorbance at surface plasmon resonance wavelength around 420 nm. The size and morphology of these nanciparticles were typically imaged using high resolution transmission electron microscopy, the particles size ranges between 4 and 5 nm and are spherical in shape. The crystal structure of the particles was characterized by X-ray diffraction pattern. The full width half maxima from X-ray diffraction measurements indicated that the particles exhibited face-centered cubic phase. (c) 2009 Elsevier B.V. All rights reserved.