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One-Step Fabrication of Dual Optically/Magnetically Modulated Walnut-like Micromotor
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posted on 2019-01-28, 00:00 authored by Dan Wang, Gang Zhao, Chunhao Chen, Hui Zhang, Ruomeng Duan, Dafeng Zhang, Mingtong Li, Bin DongIn
this paper, we report a novel multi-responsive walnut-like micromotor
consisting of polycaprolactone (PCL), iron oxide nanoparticles (Fe3O4 NPs), and catalase, which is constructed through
a one-step electrospinning method. Based on the catalytic activity
and photothermal and magnetic responsiveness originating from catalase
and Fe3O4 NPs, respectively, the resulting micromotor
exhibits an autonomous movement in the presence of hydrogen peroxide
(H2O2) fuel, controlled motion velocity under
light irradiation, and guided movement direction upon the application
of an external magnetic field. Owing to the hydrophobic nature of
the PCL polymer constituent inside the micromotor, the autonomous
moving micromotor can collect spilled oil inside a solution once it
collides with the oil droplet. Since the micromotor could be separated
out using a magnetic field, we believe the current walnut-like micromotor
holds great promise in the field of environmental remediation.