| Measurement of Diffusion Coefficient of Liquids by Using an Asymmetric Liquid-Core Cylindrical Lens： Observing the Diffusion Process Directly |
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| 作者姓名： | 李强 普小云 杨瑞芬 翟影 |
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| 作者单位： | [1]Department of Physics, Yunnan University, Kunming 650091 [2]Solid-state Lighting Engineering Research Center, Xi＇an Jiaotong University, Xi＇an 710049 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 11164033, and the Items on Research Team of Science and Technology in Yunnan Province. |
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| 摘 要： | We report a method for measuring diffusion coefficient D of liquids by using an aplanatic and asymmetric cylinder lens with a liquid core, which is designed as both a diffusion pool and the main imaging element. The precision is better than 10-4 RIU in measuring refractive index. The D values of ethylene glycol （EG） in water are measured for various EG concentrations at 25℃, and Dinf = 1.043 × 10^-5 cm^2/s under the condition of infinite dilution is obtained. The method is characterized by observing the diffusion process directly, faster measurement and obtaining the D value under the condition of infinite dilution.
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| 关 键 词： | 扩散系数 扩散过程 非对称 测量 液体 圆柱透镜 液芯 无限稀释 |
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