论文标题
观察离子的单个热运动，以及在水中的分子
Observing individual thermal motions of ions, and molecules in water with light
论文作者
论文摘要
我们在单个颗粒水平上观察到离子的热运动，并通过光灭绝在水中的分子。这些运动作为时间依赖强度变化，通过其平均光谱进行了特征。从一个粒子的随机运动得出的理论光谱描述了这些测得的光谱。该理论用于提取液体混合物和溶液的扩散常数，这些液体混合物和溶液对应于二元扩散和热扩散，这与以前的宏观测量相一致。我们还估计颗粒的尺寸。
We observe thermal motions of ions, and molecules in water through light extinction, at the individual particle level. The motions appear as time dependent intensity variations, characterized through their averaged spectra. Theoretical spectrum derived from random motions of one particle describes these measured spectra. This theory is used to extract diffusion constants of liquid mixtures and solutions, that correspond to binary diffusion, and thermal diffusion, which are consistent with previous macroscopic measurements. We also estimate the sizes of the particles.
