Self-propelled magnesium based micromotors: synthesis and magnetic steering
1 Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China
2 Chow Yuk Ho Technology Centre for Innovative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
3 Shenzhen Research Institute (SZRI), The Chinese University of Hong Kong, Shenzhen, China
a Corresponding Author E-mail: firstname.lastname@example.org
In this work the magnesium based Janus micromotors were prepared by an asymmetric coating of Co-Au bilayer on the surface of Mg microparticles. The micromotor could efficiently self-propel in phosphate buffer saline (PBS) with a highest speed of 221 μm·s−1 without any extra additives through the macrogalvanic corrosion and pitting corrosion mechanism. The influence of pH value of PBS buffer on the motion of micromotor was also investigated. Moreover, we demonstrated that the motion of micromotor could be controlled by an external magnetic field rapidly and accurately, indicating the potential application in biomedicine.
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