Magnetically Induced Reversible Transition between Cassie and Wenzel States of Superparamagnetic Microdroplets on Highly Hydrophobic Silicon Surface
文献类型：期刊论文
| 作者 | Cheng, Zhongjun2,3; Lai, Hua2; Zhang, Naiqing1,2; Sun, Kening1,2; Jiang, Lei3 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2012-09-06 |
| 卷号 | 116期号:35页码:18796-18802 |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/jp304965j |
| 英文摘要 | In this work, we report a magnetic technique for reversible wetting-dewetting transitions of microdroplets on highly hydrophobic surfaces. A superparamagnetic microdroplet can be reversibly switched between the Cassie state and the Wenzel state on a highly hydrophobic microstructured silicon substrate by the application of the magnetic field. The transition can be controlled by both the intensity of the magnetic field and the concentration of the superparamagnetic Fe3O4 nanoparticles in the microdroplet. The magnetic force needed during the transition from the Cassie state to the Wenzel state was found to be apparently smaller than that needed in the reverse process. Such asymmetry is ascribed to the higher energy of the Cassie state compared with the Wenzel state, the change of the gravitational potential energy, and the adhesion hysteresis. This report provides a novel method of dynamically controlling liquid/solid interactions, which can not only help us to understand further the transition between the Cassie state and the Wenzel state but also potentially be used in some important applications, such as lab-on-a-chip devices and chemical microreactors. |
| 语种 | 英语 |
| WOS记录号 | WOS:000308339600030 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/49749]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Sun, Kening |
| 作者单位 | 1.Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Sch Municipal & Environm Engn, Harbin 150090, Heilongjiang, Peoples R China 2.Harbin Inst Technol, Nat Sci Res Ctr, Acad Fundamental & Interdisciplinary Sci, Harbin 150090, Heilongjiang, Peoples R China 3.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, BNLMS, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Zhongjun,Lai, Hua,Zhang, Naiqing,et al. Magnetically Induced Reversible Transition between Cassie and Wenzel States of Superparamagnetic Microdroplets on Highly Hydrophobic Silicon Surface[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2012,116(35):18796-18802. |
| APA | Cheng, Zhongjun,Lai, Hua,Zhang, Naiqing,Sun, Kening,&Jiang, Lei.(2012).Magnetically Induced Reversible Transition between Cassie and Wenzel States of Superparamagnetic Microdroplets on Highly Hydrophobic Silicon Surface.JOURNAL OF PHYSICAL CHEMISTRY C,116(35),18796-18802. |
| MLA | Cheng, Zhongjun,et al."Magnetically Induced Reversible Transition between Cassie and Wenzel States of Superparamagnetic Microdroplets on Highly Hydrophobic Silicon Surface".JOURNAL OF PHYSICAL CHEMISTRY C 116.35(2012):18796-18802. |
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来源：化学研究所
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