金属尖端在半导体量子棒和四足体上的选择性生长。

Selective growth of metal tips onto semiconductor quantum rods and tetrapods.

作者信息

Mokari Taleb, Rothenberg Eli, Popov Inna, Costi Ronny, Banin Uri

机构信息

Institute of Chemistry, Farkas Center for Light-Induced Processes, Hebrew University of Jerusalem, Jerusalem 91904, Israel.

出版信息

Science. 2004 Jun 18;304(5678):1787-90. doi: 10.1126/science.1097830.

DOI:10.1126/science.1097830

PMID:15205530

Abstract

We show the anisotropic selective growth of gold tips onto semiconductor (cadmium selenide) nanorods and tetrapods by a simple reaction. The size of the gold tips can be controlled by the concentration of the starting materials. The new nanostructures display modified optical properties caused by the strong coupling between the gold and semiconductor parts. The gold tips show increased conductivity as well as selective chemical affinity for forming self-assembled chains of rods. Such gold-tipped nanostructures provide natural contact points for self-assembly and for electrical devices and can solve the difficult problem of contacting colloidal nanorods and tetrapods to the external world.

摘要

我们通过一个简单的反应展示了金尖端在半导体（硒化镉）纳米棒和四足纳米结构上的各向异性选择性生长。金尖端的尺寸可以通过起始材料的浓度来控制。这种新型纳米结构由于金和半导体部分之间的强耦合而呈现出改性的光学性质。金尖端显示出增强的导电性以及对形成棒状自组装链的选择性化学亲和力。这种带金尖端的纳米结构为自组装和电子器件提供了天然的接触点，并且能够解决将胶体纳米棒和四足纳米结构与外部世界连接的难题。