Crystallization Kinetics of Concurrent Liquid鈥揗etastable and Metastable鈥揝table Transitions, and Ostwald鈥檚 Step Rule

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• 作者：Hongwei Zhou ; Yanming Qin ; Shenghua Xu ; Zhiwei Sun
• 刊名：Langmuir
• 出版年：2015
• 出版时间：July 7, 2015
• 年：2015
• 卷：31
• 期：26
• 页码：7204-7209
• 全文大小：327K
• ISSN：1520-5827

文摘

Experimental measurements of colloidal crystallization in a wide range of volume fractions of charged particles were performed to investigate the liquid鈥搈etastable鈥搒table transition process. To fit the obtained experimental data, we developed a theoretical model to formulate the kinetics of the concurrent liquid鈥搈etastable and metastable鈥搒table transitions. This model is well-supported by our observations. We found that when the ratio of the metastable鈥搒table transition rate to the liquid鈥搈etastable rate is very large, the metastable state can become undetectable, although it still exists, offering a possible explanation for very few exceptions to Ostwald鈥檚 step rule.