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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; Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
Source PublicationSCIENCE
2012-10-05
Volume338Issue:6103Pages:87-90
ISSN0036-8075
AbstractThe 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.
KeywordPhase-transition Stability Limit Catastrophe Science Growth Bulk
Subject Area流体力学
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Indexed BySCI
Language英语
WOS IDWOS:000309457400058
Funding OrganizationThis 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.
DepartmentNML空间材料物理力学
Classification一类
Citation statistics
Cited Times:86[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46586
Collection国家微重力实验室
Corresponding AuthorHan, YL; Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
Recommended Citation
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.,...&Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China..(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.
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