Evanoff David D, Chumanov George
Department of Chemistry, Clemson University, Clemson, South Carolina 29634.
J Phys Chem B. 2004 Sep 16;108(37):13957-13962. doi: 10.1021/jp0475640.
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.
对水中化学纯净的银纳米颗粒在29至136纳米范围内的16种不同尺寸，通过实验测量了消光、散射和吸收截面及效率。测量得到的效率表明，颗粒与光的相互作用比几何截面所显示的要强4至10倍。在可见光谱范围内分别测量了等离子体共振的吸收和散射分量。提出了一种称为标准减法的方法，用于简单可靠地测定颗粒浓度，而不受其尺寸、形状和聚集状态的影响。
