Size control in the synthesis of 1-6 nm gold nanoparticles via solvent-controlled nucleation.
Size control in the synthesis of 1-6 nm gold nanoparticles via solvent-controlled nucleation.
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DOI：
10.1021/la203113r
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发表时间：
2011-10
期刊：
影响因子：
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通讯作者：
Jieun Song;Dukhan Kim;Dongil Lee
中科院分区：
文献类型：
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作者：
Jieun Song;Dukhan Kim;Dongil Lee
我们报道了一种简单的合成路线，用于尺寸可控的金纳米颗粒的制备。在苯和CHCl(3)的混合溶剂中，十二硫醇存在下，叔丁胺硼烷还原AUP(Phenyl)(3)Cl得到了几乎单分散的金纳米颗粒。机理研究表明，尺寸控制是通过溶剂控制成核实现的，其中核浓度随着CHCl(3)含量的增加而增加，导致颗粒变小。研究还发现，在溶剂控制成核之后，小颗粒消化刻蚀产生的Au(I)硫酸盐取代了核上的PPh(3)，从而实现了颗粒的生长。这一合成策略在不同链长的其他烷基硫醇中得到了成功的验证，可以在不需要任何合成后处理的情况下，以显著的产率制备尺寸可控的单分散金纳米颗粒。
We report a facile synthetic route for size-controlled preparation of gold nanoparticles. Nearly monodisperse gold nanoparticles with core diameters of 1-6 nm were obtained by reducing AuP(Phenyl)(3)Cl with tert-butylamine borane in the presence of dodecanethiol in the solvent mixture of benzene and CHCl(3). Mechanism studies have shown that the size control is achieved by the solvent-controlled nucleation in which the nuclei concentration increases with increasing the fraction of CHCl(3), leading to smaller particles. It was also found that, following the solvent-controlled nucleation, particle growth occurs via ligand replacement of PPh(3) on the nuclei by Au(I)thiolate generated by the digestive etching of small particles. This synthetic strategy was successfully demonstrated with other alkanethiols of different chain length with which size-controlled, monodisperse gold nanoparticles were prepared in remarkable yield without requiring any postsynthesis treatments.