Imaging the homogeneous nucleation during the melting of superheated colloidal crystals

	Imaging the homogeneous nucleation during the melting of superheated colloidal crystals
	Wang ZR; Wang F; Peng Y; Zheng ZY(郑中玉); Han YL; Han, YL; Han, YL
刊名	SCIENCE
	2012-10-05
通讯作者邮箱	yilong@ust.hk
卷号	338 期号:6103 页码:87-90
关键词	Phase-Transition Stability Limit Catastrophe Science Growth Bulk
ISSN号	0036-8075
通讯作者	Han, YL ; Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
产权排序	[Wang, Ziren;Wang, Feng; Peng, Yi; Zheng, Zhongyu; Han, Yilong] Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China; [Zheng, Zhongyu] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
合作状况	国内
中文摘要	The nucleation process is crucial to many phase transitions, but its kinetics are difficult to predict and measure. We superheated and melted the interior of thermal-sensitive colloidal crystals and investigated by means of video microscopy the homogeneous melting at single-particle resolution. The observed nucleation precursor was local particle-exchange loops surrounded by particles with large displacement amplitudes rather than any defects. The critical size, incubation time, and shape and size evolutions of the nucleus were measured. They deviate from the classical nucleation theory under strong superheating, mainly because of the coalescence of nuclei. The superheat limit agrees with the measured Born and Lindemann instabilities.
学科主题	流体力学
分类号	一类
收录类别	SCI
资助信息	This work was supported by the Research Grants Council of Hong Kong (General Research Fund 601208 and 601911), and we thank A. Alsayed and A. Yodh for providing the NIPA colloids.
原文出处	http://dx.doi.org/10.1126/science.1224763
语种	英语
WOS记录号	WOS:000309457400058
公开日期	2013-01-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/46586]
专题	力学研究所_国家微重力实验室
通讯作者	Han, YL; Han, YL
推荐引用方式 GB/T 7714	Wang ZR,Wang F,Peng Y,et al. Imaging the homogeneous nucleation during the melting of superheated colloidal crystals[J]. SCIENCE,2012,338(6103):87-90.
APA	Wang ZR.,Wang F.,Peng Y.,Zheng ZY.,Han YL.,...&Han, YL.(2012).Imaging the homogeneous nucleation during the melting of superheated colloidal crystals.SCIENCE,338(6103),87-90.
MLA	Wang ZR,et al."Imaging the homogeneous nucleation during the melting of superheated colloidal crystals".SCIENCE 338.6103(2012):87-90.