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. | |
发表期刊 | JOURNAL OF VISUALIZATION |
2015-08-01 | |
卷号 | 18期号:3页码:425-435 |
ISSN | 1343-8875 |
摘要 | 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. |
关键词 | Self-propulsion Janus Microparticle Rotation |
学科领域 | Computer Science ; Imaging Science & Photographic Technology |
DOI | 10.1007/s12650-015-0299-5 |
URL | 查看原文 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000358281200004 |
关键词[WOS] | Swimmers ; Hydrodynamics |
WOS研究方向 | Computer Science ; Imaging Science & Photographic Technology |
WOS类目 | Computer Science, Interdisciplinary Applications ; Imaging Science & Photographic Technology |
项目资助者 | National Natural Science Foundation of China [11272322, 11202219, 21005058] |
课题组名称 | LNM微纳米流体力学 |
论文分区 | Q4 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/55330 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Zheng, X (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China. |
作者单位 | 1.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 |
推荐引用方式 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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