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Composite Multifunctional Micromotors from Droplet Microfluidics.

Minhan Zou1, Jie Wang1, Yunru Yu1

  • 1State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China.

ACS Applied Materials & Interfaces
|September 14, 2018
PubMed
Summary

Researchers developed novel composite micromotors using a microfluidic system. These platinum and iron oxide nanoparticle-based micromotors offer efficient propulsion and magnetic guidance for diverse applications.

Keywords:
dropletmagnetic nanoparticlemicrofluidicsmicromotorparticle

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Artificial micromotors mimic biological machines for energy-to-movement conversion.
  • Developing functional micromotors is crucial for various applications.

Purpose of the Study:

  • To create a one-step method for generating composite polymer micromotors with dual distinct cores.
  • To precisely control micromotor parameters like diameter and core characteristics.

Main Methods:

  • Utilized a capillary microfluidic system with dual inner injections.
  • Precisely tuned prepolymerized fluid flow rates for controlled fabrication.
  • Incorporated platinum (Pt) nanoparticle-integrated and iron oxide (Fe3O4) nanoparticle-dispersed hydrogel cores.

Main Results:

  • Achieved one-step generation of composite structured polymer micromotors.
  • Demonstrated tunable control over micromotor diameters and core properties.
  • Micromotors exhibited propulsion via catalytic decomposition of hydrogen peroxide (H2O2) by Pt cores.
  • Fe3O4 cores provided magnetic guidance capabilities.
  • Composite micromotors showed strong propulsion and recyclability for object delivery.

Conclusions:

  • The developed microfluidic system enables efficient fabrication of dual-core composite micromotors.
  • The combination of catalytic propulsion and magnetic guidance enhances micromotor performance.
  • These composite micromotors demonstrate significant potential for diverse applications in micro- and macroscale delivery.