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Efficient Propulsion and Hovering of Bubble-Driven Hollow Micromotors underneath an Air-Liquid Interface
Wang LL; Chen L; Zhang J; Duan JM; Wang L; Silber-Li ZH(李战华); Zheng X(郑旭); Cui HH(崔海航)
2018-09-04
发表期刊LANGMUIR
卷号34期号:35页码:10426-10433
ISSN0743-7463
摘要Bubble-driven micromotors have attracted substantial interest due to their remarkable self-motile and cargo delivering abilities in biomedical or environmental applications. Here, we developed a hollow micromotor that experiences fast self-propulsion underneath an air-liquid interface by periodic bubble growth and collapse. The collapsing of a single microbubble induces a similar to 1 m.s(-1) impulsive jetting flow that instantaneously pushes the micromotor forward. Unlike previously reported micromotors propelled by the recoiling of bubbles, cavitation-induced jetting further utilizes the energy stored in the bubble to propel the micromotor and thus enhances the energy conversion efficiency by 3 orders of magnitude. Four different modes of propulsion are, for the first time, identified by quantifying the dependence of propulsion strength on micro bubble size. Meanwhile, the vertical component of the jetting flow counteracts the buoyancy of the micromotor-bubble dimer and facilitates counterintuitive hovering underneath the air-liquid interface. This work not only enriches the understanding of the propulsion mechanism of bubble-driven micromotors but also gives insight into the physical aspects of cavitation bubble dynamics near the air-liquid interface on the microscale.
DOI10.1021/acs.langmuir.8b02249
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000444060500026
关键词[WOS]LOW-REYNOLDS-NUMBER ; TRANSIENT CAVITIES ; FREE-SURFACE ; PARTICLES ; MOTORS ; MOTION ; CAVITATION ; MECHANISMS ; BOUNDARIES ; TRANSPORT
WOS研究方向Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
WOS类目Chemistry ; Materials Science
项目资助者National Natural Science Foundation of China [11572335, 11272322, 11602187, 11672358] ; Major Science and Technology Program for Water Pollution Control and Treatment [2014ZX07305-002-01] ; CAS [QYZDB-SSW-JSC036, XDB22040403]
论文分区二类/Q1
力学所作者排名5+
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77852
专题非线性力学国家重点实验室
作者单位1.[Wang, Lei-lei
2.Chen, Li
3.Zhang, Jing
4.Duan, Jin-ming
5.Wang, Lei
6.Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China
7.[Silber-Li, Zhan-hua
8.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
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GB/T 7714
Wang LL,Chen L,Zhang J,et al. Efficient Propulsion and Hovering of Bubble-Driven Hollow Micromotors underneath an Air-Liquid Interface[J]. LANGMUIR,2018,34(35):10426-10433.
APA Wang LL.,Chen L.,Zhang J.,Duan JM.,Wang L.,...&崔海航.(2018).Efficient Propulsion and Hovering of Bubble-Driven Hollow Micromotors underneath an Air-Liquid Interface.LANGMUIR,34(35),10426-10433.
MLA Wang LL,et al."Efficient Propulsion and Hovering of Bubble-Driven Hollow Micromotors underneath an Air-Liquid Interface".LANGMUIR 34.35(2018):10426-10433.
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