Light-Controlled One-Sided Growth of Large Plasmonic Gold Domains on Quantum Rods Observed on the Single Particle Level

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• 作者：Luigi Carbone ; Arpad Jakab ; Yuriy Khalavka ; Carsten Snnichsen
• 刊名：Nano Letters
• 出版年：2009
• 出版时间：November 11, 2009
• 年：2009
• 卷：9
• 期：11
• 页码：3710-3714
• 全文大小：215K
• 年卷期：v.9,no.11(November 11, 2009)
• ISSN：1530-6992

文摘

We create large gold domains (up to 15 nm) exclusively on one side of CdS or CdSe/CdS quantum rods by photoreduction of gold ions under anaerobic conditions. Electrons generated in the semiconductor by UV stimulation migrate to one tip where they reduce gold ions. Large gold domains eventually form; these support efficient plasmon oscillations with a light scattering cross section large enough to visualize single hybrid particles in a dark-field microscope during growth in real time.