TY - JOUR
T1 - Forces that control self-organization of chemically-propelled Janus tori
AU - Wang, Jiyuan
AU - Huang, Mu Jie
AU - Baker-Sediako, Remmi D.
AU - Kapral, Raymond
AU - Aranson, Igor S.
N1 - Funding Information:
This work of R.K., J.W., and M.-J.H. was supported by a grant from the Natural Sciences and Engineering Research Council of Canada. Computations were performed on SciNet HPC Consortium computers. SciNet is funded by the Canada Foundation for Innovation through Compute Canada, the Government of Ontario, Ontario Research Excellence Fund and the University of Toronto. J.W. was supported by the Fundamental Research Funds for Heilongjiang Provincial Universities, No. 702/0000080914. The research of I.S.A. was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DE-SC0020964.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - Control of the individual and collective behavior of self-propelled synthetic micro-objects has immediate application for nanotechnology, robotics, and precision medicine. Despite significant progress in the synthesis and characterization of self-propelled Janus (two-faced) particles, predictive understanding of their behavior remains challenging, especially if the particles have anisotropic forms. Here, by using molecular simulation, we describe the interactions of chemically-propelled microtori near a wall. The results show that a torus hovers at a certain distance from the wall due to a combination of gravity and hydrodynamic flows generated by the chemical activity. Moreover, electrostatic dipolar interactions between the torus and the wall result in a spontaneous tilt and horizontal translation, in a qualitative agreement with experiment. Simulations of the dynamics of two and four tori near a wall provide evidence for the formation of stable self-propelled bound states. Our results illustrate that self-organization at the microscale occurs due to a combination of multiple factors, including hydrodynamic, chemical, electrostatic and steric interactions.
AB - Control of the individual and collective behavior of self-propelled synthetic micro-objects has immediate application for nanotechnology, robotics, and precision medicine. Despite significant progress in the synthesis and characterization of self-propelled Janus (two-faced) particles, predictive understanding of their behavior remains challenging, especially if the particles have anisotropic forms. Here, by using molecular simulation, we describe the interactions of chemically-propelled microtori near a wall. The results show that a torus hovers at a certain distance from the wall due to a combination of gravity and hydrodynamic flows generated by the chemical activity. Moreover, electrostatic dipolar interactions between the torus and the wall result in a spontaneous tilt and horizontal translation, in a qualitative agreement with experiment. Simulations of the dynamics of two and four tori near a wall provide evidence for the formation of stable self-propelled bound states. Our results illustrate that self-organization at the microscale occurs due to a combination of multiple factors, including hydrodynamic, chemical, electrostatic and steric interactions.
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U2 - 10.1038/s42005-022-00953-9
DO - 10.1038/s42005-022-00953-9
M3 - Article
AN - SCOPUS:85133409912
SN - 2399-3650
VL - 5
JO - Communications Physics
JF - Communications Physics
IS - 1
M1 - 176
ER -