Biological synthesis of gold nanowires using extract of Rhodopseudomonas capsulata
Biological synthesis of gold nanowires using extract of Rhodopseudomonas capsulata
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DOI：
10.1021/bp0703174
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发表时间：
2008-03-01
影响因子：
2.9
通讯作者：
Gu, Ning
中科院分区：
文献类型：
--
作者：
He, Shiying;Zhang, Yu;Gu, Ning
提出了一种环境友好的方法，使用无细胞提取物（CFE）的红球藻capsulata合成具有网络结构的金纳米线。该方法通过改变HAuCl_4的浓度来控制金纳米颗粒的形状。CFE溶液中加入不同浓度的HAuCl 4，导致金离子的生物还原和金纳米结构形态的生物合成。这是可能的，蛋白质作为主要的生物分子参与的生物还原和合成的金纳米粒子。在较低浓度的金离子，专门的球形金纳米粒子的尺寸范围从10至20 nm的生产，而金纳米线与网络结构形成在较高浓度的金离子在水溶液中。该方法有望应用于其他金属纳米线如银和铂的合成，甚至有望使用生物合成方法合成其他各向异性金属纳米结构。
An environmentally friendly method using a cell-free extract (CFE) of Rhodopseudomonas capsulata is proposed to synthesize gold nanowires with a network structure. This procedure offers control over the shapes of gold nanoparticles with the change of HAuCl4 concentration. The CFE solutions were added with different concentrations of HAuCl4, resulting in the bioreduction of gold ions and biosynthesis of morphologies of gold nanostructures. It is probable that proteins acted as the major biomolecules involved in the bioreduction and synthesis of gold nanoparticles. At a lower concentration of gold ions, exclusively spherical gold nanoparticles with sizes ranging from 10 to 20 nm were produced, whereas gold nanowires with a network structure formed at the higher concentration of gold ions in the aqueous solution. This method is expected to be applicable to the synthesis of other metallic nanowires such as silver and platinum, and even other anisotropic metal nanostructures are expected using the biosynthetic methods.