| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Measurement of Diffusion Coefficient of Liquids by Using an Asymmetric Liquid-Core Cylindrical Lens: Observing the Diffusion Process Directly |
| LI Qiang1,2, PU Xiao-Yun1**, YANG Rui-Fen1, ZHAI Ying1 |
1Department of Physics, Yunnan University, Kunming 650091
2Solid-state Lighting Engineering Research Center, Xi'an Jiaotong University, Xi'an 710049
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| Cite this article: |
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LI Qiang, PU Xiao-Yun, YANG Rui-Fen et al 2014 Chin. Phys. Lett. 31 054203 |
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Abstract 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°C, and Dinf=1.043×10?5 cm2/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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Published: 24 April 2014
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| PACS: |
42.30.-d
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(Imaging and optical processing)
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07.60.-j
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(Optical instruments and equipment)
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07.05.Fb
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(Design of experiments)
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