| 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.
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| Source Publication | SCIENCE
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| 2012-10-05 | |
| Volume | 338Issue:6103Pages:87-90 |
| ISSN | 0036-8075 |
| Abstract | 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. |
| Keyword | Phase-transition Stability Limit Catastrophe Science Growth Bulk |
| Subject Area | 流体力学 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000309457400058 |
| Funding Organization | 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. |
| Department | NML空间材料物理力学 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46586 |
| Collection | 微重力重点实验室 |
| Corresponding Author | Han, 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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