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The Self-Propulsion of the Spherical Pt-SiO2 Janus Micro-Motor
Zhang J; Zheng X(郑旭); Cui HH(崔海航); Silber-Li ZH(李战华); Zheng, X (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Source PublicationMICROMACHINES
2017-04-01
Volume8Issue:4
ISSN2072-666X
Abstract

The double-faced Janus micro-motor, which utilizes the heterogeneity between its two hemispheres to generate self-propulsion, has shown great potential in water cleaning, drug delivery in micro/nanofluidics, and provision of power for a novel micro-robot. In this paper, we focus on the self-propulsion of a platinum-silica (Pt-SiO2) spherical Janus micro-motor (JM), which is one of the simplest micro-motors, suspended in a hydrogen peroxide solution (H2O2). Due to the catalytic decomposition of H2O2 on the Pt side, the JM is propelled by the established concentration gradient known as diffusoiphoretic motion. Furthermore, as the JM size increases to O (10 mu m), oxygen molecules nucleate on the Pt surface, forming microbubbles. In this case, a fast bubble propulsion is realized by the microbubble cavitation-induced jet flow. We systematically review the results of the above two distinct mechanisms: self-diffusiophoresis and microbubble propulsion. Their typical behaviors are demonstrated, based mainly on experimental observations. The theoretical description and the numerical approach are also introduced. We show that this tiny motor, though it has a very simple structure, relies on sophisticated physical principles and can be used to fulfill many novel functions.

KeywordJanus Micromotor Self-diffusiophoresis Bubble Propulsion
DOI10.3390/mi8040123
Indexed BySCI ; EI
Language英语
WOS IDWOS:000404117100030
WOS KeywordLOW-REYNOLDS-NUMBER ; CATALYTIC MICROMOTORS ; AUTONOMOUS MOVEMENT ; MOTION ; NANOMOTORS ; WATER ; DIFFUSIOPHORESIS ; MICRO/NANOMOTORS ; FABRICATION ; PARTICLES
WOS Research AreaScience & Technology - Other Topics ; Instruments & Instrumentation
WOS SubjectNanoscience & Nanotechnology ; Instruments & Instrumentation
Funding OrganizationNational Natural Science Foundation of China(11572335||CAS Strategic Priority Research Program(XDB22040403)||Major Science and Technology Program for Water Pollution Control and Treatment(2014ZX07305-002-01)||11272322||11602187)
DepartmentLNM微纳米流体力学
ClassificationQ3
Ranking1
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60640
Collection非线性力学国家重点实验室
Corresponding AuthorZheng, X (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhang J,Zheng X,Cui HH,et al. The Self-Propulsion of the Spherical Pt-SiO2 Janus Micro-Motor[J]. MICROMACHINES,2017,8(4).
APA Zhang J,Zheng X,Cui HH,Silber-Li ZH,&Zheng, X .(2017).The Self-Propulsion of the Spherical Pt-SiO2 Janus Micro-Motor.MICROMACHINES,8(4).
MLA Zhang J,et al."The Self-Propulsion of the Spherical Pt-SiO2 Janus Micro-Motor".MICROMACHINES 8.4(2017).
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