Extracellular biosynthesis of monodisperse gold nanoparticles by a novel extremophilic actinomycete, Thermomonospora sp.
Extracellular biosynthesis of monodisperse gold nanoparticles by a novel extremophilic actinomycete, Thermomonospora sp.
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DOI：
10.1021/la026772l
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发表时间：
2003-04-15
期刊：
影响因子：
3.9
通讯作者：
Sastry, M
中科院分区：
文献类型：
--
作者：
Ahmad, A;Senapati, S;Sastry, M
纳米技术研究的一个重要领域是合成具有不同化学成分、大小、形状和可控制分散度的纳米颗粒。目前，越来越需要开发环境友好的纳米颗粒合成工艺，在合成方案中不使用有毒化学物质。因此，纳米粒子合成和组装领域的研究人员转向生物系统寻求灵感。这并不奇怪，因为许多生物，无论是单细胞的还是多细胞的，都能在细胞内或细胞外产生无机物质。一些众所周知的生物有机体合成无机材料的例子包括趋磁细菌（合成磁铁矿纳米颗粒），2硅藻（合成硅质材料），3和s层细菌（产生石膏和碳酸钙层）。从自然界中收集到的秘密导致了先进纳米材料生长的仿生方法的发展。尽管许多生物技术应用，如有毒金属的修复，都使用了细菌和酵母等微生物（解毒通常是通过还原金属离子/形成金属硫化物来进行的），但直到最近，材料科学家才有兴趣地将这些微生物视为可能的生态友好型纳米工厂。7,8 Bev-
An important area of research in nanotechnology is the synthesis of nanoparticles of different chemical compositions, sizes, shapes, and controlled dispersities. Currently, there is a growing need to develop environmentally benign nanoparticle synthesis processes that do not use toxic chemicals in the synthesis protocol. As a result, researchers in the field of nanoparticle synthesis and assembly have turned to biological systems for inspiration. This is not surprising given that many organisms, both unicellular and multicellular, are known to produce inorganic materials either intra-or extracellularly. 1 Some well-known examples of bio-organisms synthesizing inorganic materials include magnetotactic bacteria (which synthesize magnetite nanoparticles), 2 diatoms (which synthesize siliceous materials), 3 and S-layer bacteria (which produce gypsum and calcium carbonate layers). 4 The secrets gleaned from nature have lead to the development of biomimetic approaches for the growth of advanced nanomaterials.Even though many biotechnological applications such as remediation of toxic metals employ microorganisms such as bacteria5 and yeast6 (the detoxification often occurring via reduction of the metal ions/formation of metal sulfides), it is only relatively recently that materials scientists have been viewing with interest such microorganisms as possible eco-friendly nanofactories. 7, 8 Bev-