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Biological Synthesis of Gold Nanowires Using Extract of Rhodopseudomonas capsulata

机译：荚膜红假单胞菌提取物生物合成金纳米线

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摘要

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.
机译：提出了一种使用荚膜红假单胞菌的无细胞提取物（CFE）的环保方法来合成具有网络结构的金纳米线。该程序可控制HAuCl4浓度变化对金纳米颗粒形状的控制。在CFE溶液中添加了不同浓度的HAuCl4，从而实现了金离子的生物还原和金纳米结构形态的生物合成。蛋白质可能是参与金纳米颗粒生物还原和合成的主要生物分子。在较低的金离子浓度下，仅产生尺寸为10至20 nm的球形金纳米颗粒，而在较高的水溶液中金离子浓度下形成具有网络结构的金纳米线。预期该方法可用于合成其他金属纳米线，例如银和铂，并且使用生物合成方法甚至预期其他各向异性金属纳米结构。

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