Size-controlled synthesis of nanoparticles. 2. Measurement of extinction, scattering, and absorption cross sections
Size-controlled synthesis of nanoparticles. 2. Measurement of extinction, scattering, and absorption cross sections
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DOI：
10.1021/jp0475640
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发表时间：
2004-09-16
影响因子：
3.3
通讯作者：
Chumanov, G
中科院分区：
文献类型：
--
作者：
Evanoff, DD;Chumanov, G
消光，散射和吸收截面和效率进行了实验测量化学清洁银纳米粒子在水中的16个不同的尺寸范围从29到136 nm。测量的效率表明，粒子与光的相互作用比几何截面所显示的强4-10倍。在可见光谱范围内分别测量等离子体共振的吸收和散射分量。一种方法，称为标准减法，建议用于简单可靠的测定颗粒浓度独立于它们的大小，形状和聚集状态。
Extinction, scattering, and absorption cross sections and efficiencies were experimentally measured for chemically clean silver nanoparticles in water for 16 different sizes ranging from 29 to 136 nm. The measured efficiencies indicate that particles interact with light 4-10 times stronger than the geometric cross section suggests. Absorption and scattering components of the plasmon resonance were separately measured across the visible spectral range. A method, termed standard subtraction, is suggested for the simple and reliable determination of particle concentrations independent of their size, shape, and aggregation state.