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Visualization and measurement of the self-propelled and rotational motion of the Janus microparticles
Zheng X(郑旭)1; Wu ML2; Kong FD3; Cui HH(崔海航)2; Li ZH(李战华)1; Zheng, X (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China.
Source PublicationJOURNAL OF VISUALIZATION
2015-08-01
Volume18Issue:3Pages:425-435
ISSN1343-8875
Abstract

The self-propelled diffusiophoresis, induced by an asymmetric concentration gradient field, provides a new strategy to manipulate micro-objects (like some cells and colloids) in solutions. One example is the autonomous motion of the double-faced Janus microparticle (platinum coating on one half of a silica particle) due to a chemically catalyzed reaction (reduction of hydrogen peroxide) on the Pt surface. In this paper, a systematic method is developed to describe the details of self-propulsion and rotation of Janus microparticles, despite the difficulty induced by particle non-uniformity. From the measurement, we found that the particles presented a three-stage behavior of the dimensionless mean square displacement, and their displacement probability distribution formed a double-peaked structure. These results show the intrinsic characteristics and the non-Gaussian behavior of Janus particle's self-propulsion. Furthermore, the rotational motion is characterized by the rotational angle variation and the rotational diffusion coefficient. These results show that Brownian rotation still dominates the Janus microparticle's rotational motion, though the measured rotational diffusion coefficient presents an anomalous tendency.;The self-propelled diffusiophoresis, induced by an asymmetric concentration gradient field, provides a new strategy to manipulate micro-objects (like some cells and colloids) in solutions. One example is the autonomous motion of the double-faced Janus microparticle (platinum coating on one half of a silica particle) due to a chemically catalyzed reaction (reduction of hydrogen peroxide) on the Pt surface. In this paper, a systematic method is developed to describe the details of self-propulsion and rotation of Janus microparticles, despite the difficulty induced by particle non-uniformity. From the measurement, we found that the particles presented a three-stage behavior of the dimensionless mean square displacement, and their displacement probability distribution formed a double-peaked structure. These results show the intrinsic characteristics and the non-Gaussian behavior of Janus particle's self-propulsion. Furthermore, the rotational motion is characterized by the rotational angle variation and the rotational diffusion coefficient. These results show that Brownian rotation still dominates the Janus microparticle's rotational motion, though the measured rotational diffusion coefficient presents an anomalous tendency.

KeywordSelf-propulsion Janus Microparticle Rotation
Subject AreaComputer Science ; Imaging Science & Photographic Technology
DOI10.1007/s12650-015-0299-5
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000358281200004
WOS KeywordSwimmers ; Hydrodynamics
WOS Research AreaComputer Science ; Imaging Science & Photographic Technology
WOS SubjectComputer Science, Interdisciplinary Applications ; Imaging Science & Photographic Technology
Funding OrganizationNational Natural Science Foundation of China [11272322, 11202219, 21005058]
DepartmentLNM微纳米流体力学
ClassificationQ4
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/55330
Collection非线性力学国家重点实验室
Corresponding AuthorZheng, X (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China.
Affiliation1.Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China
2.Xian Univ Architecture & Technol, Xian 710055, Peoples R China
3.Shanghai Univ, Shanghai 200444, Peoples R China
Recommended Citation
GB/T 7714
Zheng X,Wu ML,Kong FD,et al. Visualization and measurement of the self-propelled and rotational motion of the Janus microparticles[J]. JOURNAL OF VISUALIZATION,2015,18(3):425-435.
APA Zheng X,Wu ML,Kong FD,Cui HH,Li ZH,&Zheng, X .(2015).Visualization and measurement of the self-propelled and rotational motion of the Janus microparticles.JOURNAL OF VISUALIZATION,18(3),425-435.
MLA Zheng X,et al."Visualization and measurement of the self-propelled and rotational motion of the Janus microparticles".JOURNAL OF VISUALIZATION 18.3(2015):425-435.
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