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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)
Source PublicationJOURNAL OF CHEMICAL PHYSICS
2018-02-14
Volume148Issue:6Pages:64704
ISSN0021-9606
AbstractThe 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
Indexed BySCI ; EI
Language英语
WOS IDWOS:000425299800029
WOS KeywordSURFACE NANOBUBBLES ; INTERFACIAL NANOBUBBLES ; HYDROPHOBIC SURFACES ; WATER ; SLIP ; NANODROPLETS ; DEFORMATION ; DIMENSIONS ; DEVICES ; GROWTH
WOS Research AreaChemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS SubjectChemistry ; Physics
Funding OrganizationNational 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
Classification二类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77798
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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