In Vivo Synthesis of Nanocomposites Using the Recombinant Escherichia coli,Small

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In Vivo Synthesis of Nanocomposites Using the Recombinant Escherichia coli
Small ( IF 13.0 ) Pub Date : 2018-09-17 , DOI: 10.1002/smll.201803133
Jae Hwan Jung ₁ , Sang Yup Lee ₂ , Tae Seok Seo ₃

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Biogenic gold nanorod (AuNR)‐Ag core–shell nanocomposites (NCs) are synthesized by using recombinant Escherichia coli to demonstrate in vivo synthesis of biogenic NCs for the first time. The chemically synthesized AuNRs are internalized into the E. coli, and Ag ions are reduced and grown on the surface of the AuNRs with the assistance of metal‐binding proteins, producing biogenic core–shell AuNR‐Ag NCs. The core–shell structure of the biogenic AuNR‐Ag NC is confirmed by transmission electron microscopy and energy‐dispersive X‐ray analysis. The biogenic AuNR‐Ag NCs exhibit good plasmonic effects. While the core–shell morphology of the AuNR and Ag NCs is due to the similar lattice of Au and Ag, the shape of the biogenic NCs composed of gold nanoparticles and Fe is aciniform, and that of Fe₃O₄ NPs and Au/Ag is a network structure, demonstrating the controllability of biogenic nanosynthesis using diverse metal combinations with different NC morphologies.

中文翻译：

使用重组大肠杆菌体内合成纳米复合材料

利用重组大肠杆菌合成了生物金纳米棒（AuNR）-Ag核壳纳米复合材料（NC），这是首次证明了生物NC的体内合成。化学合成的AuNR被内化到大肠杆菌中，并且在金属结合蛋白的帮助下，Ag离子被还原并在AuNRs的表面上生长，从而产生生物型核壳AuNR-Ag NCs。通过透射电子显微镜和能量色散X射线分析证实了生物型AuNR-Ag NC的核-壳结构。具有生物成因的AuNR-Ag NC表现出良好的等离激元效应。虽然AuNR和Ag NCs的核-壳形态是由于Au和Ag的晶格相似，但是由金纳米颗粒和Fe组成的生物NCs的形状为棒状，而Fe ₃ O ₄ NPs和Au / Ag的形状为NC。是一种网络结构，表明使用具有不同NC形态的多种金属组合可控制生物纳米合成。

更新日期：2018-09-17

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