摘要
金纳米粒子由于特有的局域表面等离激元共振效应(localized surface plasmon resonance,LSPR)而展现出特殊的光学性质,并在SERS、光催化、太阳能电池、生物传感等方面得到了广泛的应用。局域表面等离激元共振效应发生在金属纳米粒子的表面,当入射光频率与金属纳米粒子电子振荡频率相同时会在纳米粒子表面产生巨大的电子共振,这种共振会极大的增强粒子表面附近的场强~([1,2])。这篇报道中我们采用了一种简单高效的方法制备出具有超小间距的的金纳米球基底,由于金纳米粒子间极强的表面等离激元共振耦合使得该金纳米球基底在近红外光谱区域表现出很强的LSPR响应,并在此光谱区域表现出了卓越的催化性能。
Gold nanoparticles have special optical properties because of their localized surface plasmon resonance and it can be used for SERS, photocatalysts, solar cells, biosensors and so on. Localized Surface Plasmon Resonance occurs on the surface of metal nanoparticles, when the frequency of the incident light matches the electron oscillation frequency of metal nanoparticles. It will result to an enhanced electromagnetic field around the particle. Here, we have prepared closely packed gold nanoparticle substrate in a simple way, and the substrate shown intensive response and great photocatalysts ability at the near infrared(NIR) region because of the strong plasmonic resonance coupling between gold nanoparticles.
引文
[1]Changlong Wang.Didier Astruc.Chem.Soc.Rev.2014,43:7188.
[2]Jingjing Qiu.Yung Chien Wu.Yi Chung Wang.Mark H.Engelhard.J.Am.Chem.Soc.2013,135:38.
