NDLI: Visualization and measurement of the self-propelled and rotational motion of the Janus microparticles

Content Provider	Springer Nature Link
Author	Zheng, Xu Wu, Meiling Kong, Fandong Cui, Haihang Silber Li, Zhanhua
Copyright Year	2015
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.
Starting Page	425
Ending Page	435
Page Count	11
File Format	PDF
ISSN	13438875
Journal	Journal of Visualization
Volume Number	18
Issue Number	3
e-ISSN	18758975
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-05-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Self-propulsion Janus microparticle Rotation Engineering Fluid Dynamics Computer Imaging, Vision, Pattern Recognition and Graphics Classical Continuum Physics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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