Enhanced and Robust Directional Propulsion of Light-Activated Janus Micromotors by Magnetic Spinning and the Magnus Effect

Li，Jianjie1; He，Xiaoli1; Jiang，Huaide1; Xing，Yi1; Fu，Bi1; Hu，Chengzhi1,2

2022-08-10

10.1021/acsami.2c08464

ACS Applied Materials & Interfaces   Impact Factor & Quartile

1944-8244

1944-8252

Advances in the versatile design and synthesis of nanomaterials have imparted diverse functionalities to Janus micromotors as autonomous vehicles. However, a significant challenge remains in maneuvering Janus micromotors by following desired trajectories for on-demand motility and intelligent control due to the inherent rotational Brownian motion. Here, we present the enhanced and robust directional propulsion of light-activated Fe3O4@TiO2/Pt Janus micromotors by magnetic spinning and the Magnus effect. Once exposed to a low-intensity rotating magnetic field, the micromotors become physically actuated, and their rotational Brownian diffusion is quenched by the magnetic rotation. Photocatalytic propulsion can be triggered by unidirectional irradiation based on a self-electrophoretic mechanism. Thus, a transverse Magnus force can be generated due to the rotational motion and ballistic motion (photocatalytic propulsion) of the micromotors. Both the self-electrophoretic propulsion and the Magnus force are periodically changed due to the magnetic rotation, which results in an overall directed motion moving toward a trajectory with a deflection angle from the direction of incident light with enhanced speed, maneuverability, and steering robustness. Our study illustrates the admirable directional motion capabilities of light-driven Janus micromotors based on magnetic spinning and the Magnus effect, which unfolds a new paradigm for addressing the limitations of directionality control in the current asymmetric micromotors.

hybrid actuation Janus micromotor magnetic spinning Magnus force motion directionality

SCI ; EI

English

First

National Natural Science Foundation of China[61903177] ; Shenzhen Science and Technology Program[JCYJ20190809144013494] ; Science and Technology Program of Guangdong[2021A1515011813] ; Science, Technology and Innovation Commission of Shenzhen Municipality[ZDSYS20200811143601004]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000836332500001

AMER CHEMICAL SOC

20223412596924

Brownian movement ; Incident light ; Magnetism ; Magnetite ; Propulsion ; Titanium dioxide

Magnetism: Basic Concepts and Phenomena:701.2 ; Electric Motors:705.3 ; Light/Optics:741.1 ; Colloid Chemistry:801.3 ; Inorganic Compounds:804.2

2-s2.0-85135768766

Scopus

1.Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems,Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities,Southern University of Science and Technology,Shenzhen,518055,China

Li，Jianjie,He，Xiaoli,Jiang，Huaide,et al. Enhanced and Robust Directional Propulsion of Light-Activated Janus Micromotors by Magnetic Spinning and the Magnus Effect[J]. ACS Applied Materials & Interfaces,2022,14(31):36027-36037.

Li，Jianjie,He，Xiaoli,Jiang，Huaide,Xing，Yi,Fu，Bi,&Hu，Chengzhi.(2022).Enhanced and Robust Directional Propulsion of Light-Activated Janus Micromotors by Magnetic Spinning and the Magnus Effect.ACS Applied Materials & Interfaces,14(31),36027-36037.

Li，Jianjie,et al."Enhanced and Robust Directional Propulsion of Light-Activated Janus Micromotors by Magnetic Spinning and the Magnus Effect".ACS Applied Materials & Interfaces 14.31(2022):36027-36037.