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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Scattering and Absorption Cross-Section Spectral Measurements of Gold Nanorods in Water
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Scattering and Absorption Cross-Section Spectral Measurements of Gold Nanorods in Water

机译：金纳米棒在水中的散射和吸收截面光谱测量

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摘要

The usually measured attenuation (extinction) spectra of gold nanorods in water include two unresolving contributions: absorption and scattering. The present study is to separate these two contributions by measuring the total scattering losses as a function of wavelengths. Knowing the total-attenuation spectrum and the scattering-loss spectrum, the pure absorption spectrum can be finally determined for a given sample system. Two approaches are employed for experimentally estimating the pure scattering losses: one is direct measurement using a calibrated large-area photodetector to collect the scattered energy along a certain solid angle; the other is comparison measurement by using polystyrene microspheres in water as a standard sample whose scattering cross section is known well. These two methods have given nearly the same results and are finally compared with the theoretical calculations.
机译：通常测量的金纳米棒在水中的衰减（消光）光谱包括两个无法解析的贡献：吸收和散射。本研究通过测量作为波长函数的总散射损耗来分离这两个贡献。知道了总衰减谱和散射损耗谱，就可以最终确定给定样品系统的纯吸收谱。有两种方法可以通过实验估算纯散射损耗：一种方法是使用校准的大面积光电探测器直接测量，以沿一定立体角收集散射能量。另一种是通过使用聚苯乙烯微球在水中作为标准样品进行比较测量，其散射截面众所周知。这两种方法给出了几乎相同的结果，并最终与理论计算进行了比较。

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