Dynamic Crystallization and Phase Transition in Evaporating Colloidal Droplets
文献类型：期刊论文
| 作者 | Wang, X; Wu, LL; Wang, G; Chen, G |
| 刊名 | NANO LETTERS
 |
| 出版日期 | 2019 |
| 卷号 | 19期号:11页码:8225-8233 |
| 关键词 | HARD-SPHERE NANOPARTICLES NUCLEATION GROWTH TIME |
| ISSN号 | 1530-6984 |
| DOI | 10.1021/acs.nanolett.9b03633 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Evaporating colloidal droplets are an omnipresent phenomenon in nature and engage in many scientific and commercial technologies. Despite their apparent importance, many of the fundamental aspects remain unknown, particularly the relationships between evaporation kinetics, volume fraction, crystallization, and phase transition. Here, we follow the structural evolution and drying dynamics across the liquid-to-solid transition of evaporating colloidal droplets containing polystyrene nano-spheres with both spatial and temporal resolutions through the in situ small-angle X-ray scattering and ex situ electron microscopy techniques. We find the unconventional evaporation-driven heterogeneous crystallization and the sequential stacking of face-centered cubic (fcc), random hexagonal close-packed (rhcp), and random close-packed (rcp) superlattice structures. The crystallization and phase transition processes are further elucidated and coordinated with the real-time volume fraction variation, which constitutes a rich and dynamic picture of the self-assembly process. Starting with the Onsager principle, we provide quantitative analysis to the evaporation kinetics, including concentration gradient, gelation, and cavitation. Our findings impart a new mechanism of dynamic nucleation and crystallization and reveal the intimate link between structural heterogeneity and evaporation kinetics. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32031]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China; 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, X,Wu, LL,Wang, G,et al. Dynamic Crystallization and Phase Transition in Evaporating Colloidal Droplets[J]. NANO LETTERS,2019,19(11):8225-8233. |
| APA | Wang, X,Wu, LL,Wang, G,&Chen, G.(2019).Dynamic Crystallization and Phase Transition in Evaporating Colloidal Droplets.NANO LETTERS,19(11),8225-8233. |
| MLA | Wang, X,et al."Dynamic Crystallization and Phase Transition in Evaporating Colloidal Droplets".NANO LETTERS 19.11(2019):8225-8233. |
入库方式： OAI收割
来源：上海应用物理研究所
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