Infrared extinction properties of gold nanoshells
Infrared extinction properties of gold nanoshells
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DOI：
10.1063/1.125183
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发表时间：
1999-11-08
影响因子：
4
通讯作者：
Halas, NJ
中科院分区：
文献类型：
--
作者：
Oldenburg, SJ;Jackson, JB;Halas, NJ
金纳米壳，纳米粒子组成的二氧化硅核心包覆着薄的金壳，表现出强烈的光学共振，敏感地依赖于他们的核心半径和壳的厚度。金纳米壳已经制造了一个峰值消光，可以在光谱的近红外区域（800 nm-2.2 μ m）变化。多极等离子体共振在消光光谱中是清晰可分辨的，并且与电磁理论很好地吻合。还观察到由于颗粒聚集引起的额外共振。这些纳米粒子的频率捷变红外特性使它们对一系列技术上重要的应用特别有吸引力。(C)1999年美国物理学会。[S0003-6951（99）01945-2]。
Gold nanoshells, nanoparticles consisting of a silica core coated with a thin gold shell, exhibit a strong optical resonance that depends sensitively on their core radius and shell thickness. Gold nanoshells have been fabricated with a peak optical extinction that can be varied across the near-infrared region of the spectrum (800 nm-2.2 mu m). Multipolar plasmon resonances are clearly resolvable in the extinction spectra and agree well with electromagnetic theory. Additional resonances due to particle aggregation are also observed. The frequency agile infrared properties of these nanoparticles make them particularly attractive for a range of technologically important applications. (C) 1999 American Institute of Physics. [S0003-6951(99)01945-2].