Moon Cheon Woo, Park Jongseong, Hong Seung-Pyo, Sohn Woonbae, Andoshe Dinsefa Mensur, Shokouhimehr Mohammadreza, Jang Ho Won
Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University Seoul 08826 Republic of Korea
RSC Adv. 2018 May 21;8(33):18442-18450. doi: 10.1039/c8ra03523g. eCollection 2018 May 17.
The benefit of introducing gold nanoparticles is due to the plasmon relaxation process. The plasmon decay induces various phenomena such as near-field enhancement, hot electron injection, and resonance energy transfer. Shape-controlled octahedral gold nanoparticles can maximize the efficiency of these processes. For practical purposes, a high-coverage decoration method, comparable to physical vapor deposition on a metal oxide semiconductor nanostructure, is indispensable. However, the ligand exchange reaction to attach octahedral gold nanoparticles is limited in aqueous solution due to the inactivity of the gold (111) surface as a result of a densely-packed cetyltrimethylammonium bilayer structure. Herein, we report a controllable high-coverage surface decoration method of octahedral gold nanoparticles on the targeted semiconductor nanostructures phase transfer by an organic medium with thiolated-polyethylene glycol. Our results deliver an innovative platform for future plasmonic gold nanoparticle applications.
引入金纳米颗粒的益处源于等离子体弛豫过程。等离子体衰变会引发诸如近场增强、热电子注入和共振能量转移等各种现象。形状可控的八面体金纳米颗粒能够使这些过程的效率最大化。出于实际应用目的，一种与在金属氧化物半导体纳米结构上进行物理气相沉积相当的高覆盖率修饰方法是必不可少的。然而，由于十六烷基三甲基铵双层结构紧密堆积导致金（111）表面不活泼，在水溶液中用于附着八面体金纳米颗粒的配体交换反应受到限制。在此，我们报道了一种通过含有硫醇化聚乙二醇的有机介质进行相转移，在目标半导体纳米结构上对八面体金纳米颗粒进行可控高覆盖率表面修饰的方法。我们的研究结果为未来等离子体金纳米颗粒的应用提供了一个创新平台。
