Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
J Am Chem Soc. 2011 Feb 2;133(4):672-5. doi: 10.1021/ja1076603.
We introduce a facile approach for the selective deposition of metals on Au-tipped CdSe-seeded CdS nanorods that exploits the transfer of electrons from CdS to the Au tips upon UV excitation. This light-induced deposition method was used for the deposition of Pd under mild conditions, which produced a Pd/Au alloyed tip while preserving the rest of the semiconductor nanoarchitecture. The highly site-selective deposition method was extended to the deposition of Fe, yielding monodispersed, structurally complex Au core/Fe(x)O(y) hollow shell-tipped semiconductor nanorods. These structurally well-defined rods were found to exhibit magnetic functionality. The synthetic strategies described in this work expand on the range of metals that can be deposited on heterostructured semiconductor nanorods, opening up new avenues for the hierarchical buildup of structural complexity and therefore multifunctionality in nanoparticles.
我们介绍了一种在 Au 尖端 CdSe 种子的 CdS 纳米棒上选择性沉积金属的简便方法，该方法利用了在 UV 激发下从 CdS 到 Au 尖端的电子转移。这种光诱导沉积方法用于在温和条件下沉积 Pd，生成 Pd/Au 合金尖端，同时保留半导体纳米结构的其余部分。高选择性沉积方法扩展到 Fe 的沉积，得到单分散的、结构复杂的 Au 核/Fe(x)O(y)空心壳尖端半导体纳米棒。这些结构定义良好的棒被发现具有磁性功能。本工作中描述的合成策略扩展了可以沉积在异质结构半导体纳米棒上的金属范围，为在纳米颗粒中分层构建结构复杂性和多功能性开辟了新的途径。
