Self-propelled magnesium based micromotors: synthesis and magnetic steering

Dongdong Jin,Jiangfan Yu,Li Zhang,Ka Hei Chan,Y Bellouard

doi:10.1051/matecconf/20153204004

Abstract

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.

Highlights

IntroductionSynthetic micro-/nanomotors have aroused considerable low cost, excellent biocompatibility and efficient motion research interest owing to their various potential [21,22,23]
Synthetic micro-/nanomotors have aroused considerable low cost, excellent biocompatibility and efficient motion research interest owing to their various potential [21,22,23].applications ranging from biomedical applications toIn this study, Mg based micromotors were prepared environmental remediation, such as targeted delivery, by asymmetric coating of Co and Au on the surface of biological targets isolation, pollutants sensing and Mg microparticles, and their autonomous motion in remediation in waste water, and so on [1, 2]
The mapping energy dispersive X-ray (EDX) analysis (showed in (b), (c), (d) of Fig. 3) indicated that Co and Au could only be detected in the asymmetric coat, and Mg could be found in the opening side of the particle, further validates that Mg/Co-Au Janus particle was obtained

Summary

Introduction

Synthetic micro-/nanomotors have aroused considerable low cost, excellent biocompatibility and efficient motion research interest owing to their various potential [21,22,23]. Introduced Al-Ga/Ti Janus particles, and they were the After being dried at 60 °C, the surface of glass slide was first bubble-propelled micromotors based on metal-water coated with a thin PVP film. By magnesium-water reaction with the existence of After being dried at 60 °C, the Mg spheres were partially chloridion or bicarbonate ion, were proposed due to their embedded in the PVP film and stick to the glass slide. The partially coated Mg microparticles were released from the glass substrate by sonicating the glass slide in ethanol and stored in absolute ethanol before use

Magnetic manipulation system

Results and Discussion

Conclusions