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Nanobubbles in confined solution: Generation, contact angle, and stability
Wei JC(韦佳辰); Zhang XR; Song F(宋凡); Shao YF(邵颖峰)
2018-02-14
发表期刊JOURNAL OF CHEMICAL PHYSICS
卷号148期号:6页码:64704
ISSN0021-9606
摘要The formation of gas bubbles presents a frequent challenge to microfluidic operations, for which fluids are geometrically confined to a microscale space. Here, to understand the mechanism of nucleating gas bubbles in microfluidic devices, we investigate the formation and stability of nanobubbles in confined solutions. Our molecular dynamics simulations show that while pinning of the contact line is a prerequisite for the stability of surface nanobubbles in open systems that can exchange gas with surrounding environment, in confined solutions, stable nanobubbles can exist even without pinning. In supersaturated condition, stable bubbles can be found in confined solutions with acute or obtuse contact angle, depending on the substrate hydrophobicity. We also demonstrate that when open to the bulk solution, the stable nanobubbles in closed systemswould become unstable unless both supersaturation and pinning of the contact line are satisfied. Our results not only shed light on the design of novel heterogeneous surfaces for generating nanobubbles in confined space with controllable shape and stability but also address the crucial effect of gas exchange with the surroundings in determining the stability of nanobubbles. Published by AIP Publishing.
DOI10.1063/1.5010991
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000425299800029
关键词[WOS]SURFACE NANOBUBBLES ; INTERFACIAL NANOBUBBLES ; HYDROPHOBIC SURFACES ; WATER ; SLIP ; NANODROPLETS ; DEFORMATION ; DIMENSIONS ; DEVICES ; GROWTH
WOS研究方向Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS类目Chemistry ; Physics
项目资助者National Natural Science Foundation of China [11602279, 21276007, 11472285, 91434204] ; National Key Research and Development Program of China [2016YFA0501601] ; Strategic Priority Research Program of Chinese Academy of Sciences [XDB22040102] ; China Scholarship Council
论文分区二类
力学所作者排名1
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77798
专题非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Mech, Beijing Key Lab Engn Construct & Mechanobiol, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
4.Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
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Wei JC,Zhang XR,Song F,et al. Nanobubbles in confined solution: Generation, contact angle, and stability[J]. JOURNAL OF CHEMICAL PHYSICS,2018,148(6):64704.
APA 韦佳辰,Zhang XR,宋凡,&邵颖峰.(2018).Nanobubbles in confined solution: Generation, contact angle, and stability.JOURNAL OF CHEMICAL PHYSICS,148(6),64704.
MLA 韦佳辰,et al."Nanobubbles in confined solution: Generation, contact angle, and stability".JOURNAL OF CHEMICAL PHYSICS 148.6(2018):64704.
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