Scattering spectra of single gold nanoshells
Scattering spectra of single gold nanoshells
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DOI：
10.1021/nl048610a
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发表时间：
2004-12-01
期刊：
影响因子：
10.8
通讯作者：
Hafner, JH
中科院分区：
文献类型：
--
作者：
Nehl, CL;Grady, NK;Hafner, JH
单粒子暗场光谱已结合高分辨率扫描电子显微镜和原子力显微镜研究单个金/二氧化硅纳米壳的散射光谱。等离子体共振峰能量与基于纳米壳几何结构的Mie理论计算的能量相匹配。共振线宽符合米氏理论，而不包括一个大小依赖的表面散射项，这是经常包括以适应合奏测量。这些结果表明，等离子体光谱测量的纳米粒子系综拓宽由于粒子的不均匀性。
Single particle dark field spectroscopy has been combined with high-resolution scanning electron and atomic force microscopy to study the scattering spectra of single gold/silica nanoshells. The plasmon resonant peak energies match those calculated by Mie theory based on the nanoshell geometry. The resonance line widths fit Mie theory without the inclusion of a size-dependent surface scattering term, which is often included to fit ensemble measurements. These results suggest that plasmon spectral measurements of nanoparticle ensembles are broadened due to particle inhomogeneity.