Precise size control of hydrophobic gold nanoparticles using cooperative effect of refluxing ripening and seeding growth
Precise size control of hydrophobic gold nanoparticles using cooperative effect of refluxing ripening and seeding growth
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DOI：
10.1088/0957-4484/19/17/175603
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发表时间：
2008-03
期刊：
影响因子：
3.5
通讯作者：
Yun Yang;Yachen Yan;W. Wang;Jin-ru Li
中科院分区：
文献类型：
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作者：
Yun Yang;Yachen Yan;W. Wang;Jin-ru Li
本文描述了一种用于精确控制单分散混合金纳米颗粒尺寸的合成技术，该技术结合了种子生长和消化成熟。在这个过程中，烷基胺允许HAuCl 4的溶解和热还原，而2.1 nm的金纳米粒子被硫醇功能作为种子。通过仔细控制HAuCl 4/种子的比例，可以产生具有各种尺寸（从2.1到8.8 nm）的高度单分散的金纳米颗粒。烷基胺的变化以及生长过程的优化允许在0.5 nm范围内精确调节粒度。在XPS和TEM研究的基础上，提出了纳米颗粒形成的机理。
We describe herein a synthetic technology for precise size control of monodispersed hybrid gold nanoparticles, which combines seeding growth and digestive ripening. In this procedure, alkyl amines allow the solubilization and thermal reduction of HAuCl4 while 2.1 nm gold nanoparticles capped by thiol functions are used as seeds. By carefully controlling the HAuCl4/seeds ratio, highly monodisperse gold nanoparticles with various sizes (from 2.1 to 8.8 nm) can be generated. Variation of the alkyl amines as well as optimization of the growth procedure allows the precise tuning of particle size within a 0.5 nm range. On the basis of XPS and TEM studies, a mechanism for nanoparticle formation is proposed.