In Situ Observation of NaCl Crystal Growth by the Vapor Diffusion Method with a Mach–Zehnder Interferometer
ZHAO Jing1, MIAO Hong1**, DUAN Li2, KANG Qi2, HE Ling-Hui1
1Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027 2National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190
In Situ Observation of NaCl Crystal Growth by the Vapor Diffusion Method with a Mach–Zehnder Interferometer
ZHAO Jing1, MIAO Hong1**, DUAN Li2, KANG Qi2, HE Ling-Hui1
1Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027 2National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190
摘要Vapor diffusion experiments with different thicknesses of oil barriers are observed by a real-time optical diagnostic system consisting of a Mach–Zehnder interferometer, a microscope and an image processor. Spatiotemporal analysis is first employed to extract the absolute concentration evolution and supersaturation during the entire crystallization process. The nucleation and crystal growth processes are then analyzed. It is found that the crystallization process can be easily classified into four stages in our experiments, according to the analysis of interferograms and the absolute concentration curve. This can help us understand the details of crystal growth. The rule of quality change of crystals with increasing thickness of oil barriers is also analyzed, and could be interpreted by the absolute concentration variation and crystallization phase diagram.
Abstract：Vapor diffusion experiments with different thicknesses of oil barriers are observed by a real-time optical diagnostic system consisting of a Mach–Zehnder interferometer, a microscope and an image processor. Spatiotemporal analysis is first employed to extract the absolute concentration evolution and supersaturation during the entire crystallization process. The nucleation and crystal growth processes are then analyzed. It is found that the crystallization process can be easily classified into four stages in our experiments, according to the analysis of interferograms and the absolute concentration curve. This can help us understand the details of crystal growth. The rule of quality change of crystals with increasing thickness of oil barriers is also analyzed, and could be interpreted by the absolute concentration variation and crystallization phase diagram.
ZHAO Jing;MIAO Hong**;DUAN Li;KANG Qi;HE Ling-Hui
. In Situ Observation of NaCl Crystal Growth by the Vapor Diffusion Method with a Mach–Zehnder Interferometer[J]. 中国物理快报, 2011, 28(10): 108102-108102.
ZHAO Jing, MIAO Hong**, DUAN Li, KANG Qi, HE Ling-Hui
. In Situ Observation of NaCl Crystal Growth by the Vapor Diffusion Method with a Mach–Zehnder Interferometer. Chin. Phys. Lett., 2011, 28(10): 108102-108102.
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2011, Vol. 28 
