Directly monitoring the growth of gold nanoparticle seeds into gold nanorods
Directly monitoring the growth of gold nanoparticle seeds into gold nanorods
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DOI：
10.1021/la047408k
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发表时间：
2004-12-21
期刊：
影响因子：
3.9
通讯作者：
Zamborini, FP
中科院分区：
文献类型：
--
作者：
Wei, ZQ;Zamborini, FP
本文描述了在种子介导生长成金纳米棒 (Au NR) 和其他形状（球形、三角形和六边形）之前和之后，使用原子力显微镜直接对表面附着的 3-5 nm 直径金纳米粒子种子进行成像。结果表明，An NR 由向一个或两个方向生长的种子形成。种子直径和 NR 直径之间存在直接相关性；小直径种子形成小直径NR。然而，种子直径与纳米结构形状或 NR 长度之间的相关性不太明显。我们根据文献中提出的生长机制描述了我们的结果，并讨论了表面生长的 Au NR 观察到的大尺寸分散性的可能原因。更好地了解 Au NR 和其他金属和半导体一维 (1D) 生长过程对于改进合成、调整其性能以及利用 1D 纳米结构进行有用的技术应用是必要的。
This paper describes the use of atomic force microscopy to directly image surface-attached 3-5 nm diameter gold nanoparticle seeds before and after seed-mediated growth into gold nanorods (Au NRs) and other shapes (spheres, triangles, and hexagons). Results show that An NRs form from seeds growing in either one or two directions. A direct correlation exists between seed diameter and NR diameter; small diameter seeds form small diameter NRs. However, correlation between seed diameter and nanostructure shape or NR length is less evident. We describe our results in terms of growth mechanisms proposed in the literature and discuss possible reasons for the large size dispersity observed for surface-grown Au NRs. A better understanding of Au NR and other metal and semiconductor one-dimensional (1D) growth processes is necessary to improve synthesis, tailor their properties, and utilize 1D nanostructures for useful technological applications.