Determination of the translational and rotational diffusion coefficients of rodlike particles using depolarized dynamic light scattering
Determination of the translational and rotational diffusion coefficients of rodlike particles using depolarized dynamic light scattering
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DOI：
10.1021/la9910273
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发表时间：
2000-02-22
期刊：
影响因子：
3.9
通讯作者：
Glatter, O
中科院分区：
文献类型：
--
作者：
Lehner, D;Lindner, H;Glatter, O
去偏振动态光散射（DDLS）实验报告在三个不同的系统：烟草花叶病毒作为一个很好的研究样品; PEO-PPO-PEO三嵌段共聚物胶束，这表明球棒过渡随着温度的升高;和类型的水/辛烷/CiEj的微乳液。DDLS测量进行了高分辨偏振器和单模光纤检测在不同的散射角，获得衰减率γ（VH）与散射角。旋转和平移扩散系数可从这些图被用来评估系统的尺寸参数，使用Broersma的表达式为一个刚性杆。与理论和文献的良好协议，发现在烟草花叶病毒的情况下，并在浓度低于重叠浓度c* 的其他两个系统。
Depolarized dynamic light scattering (DDLS) experiments are reported on three different systems: on tobacco mosaic virus as a well investigated sample; on PEO-PPO-PEO triblock copolymer micelles, which show sphere-to-rod transition with increasing temperature; and on a microemulsion of the type water/octane/CiEj. DDLS measurements were performed using highly discriminating polarizers and single-mode fiber detection at different scattering angles, obtaining decay rates Gamma(VH) versus scattering angle. The rotational and translational diffusion coefficients available from these plots were taken to evaluate size parameters of the systems using Broersma's expressions for a stiff rod. Good agreement with theory and literature was found in the case of tobacco mosaic virus and at concentrations below the overlap concentration c* for the other two systems.