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Micropatterning and Assembly of 3D Microvessels
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Capillary-Force-Driven Self-Assembly of 4D-Printed Microstructures.

Xiaojiang Liu1,2, Mengxiao Wei1, Qiong Wang1

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

Advanced Materials (Deerfield Beach, Fla.)
|April 22, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces 4D microprinting for reversible, bidirectional self-assembly of microstructures. This advanced technique enables controlled material properties and diverse applications, overcoming limitations of traditional unidirectional methods.

Keywords:
4D microprintingasymmetric crosslinking densitybidirectional self-assemblycurved microstructurestwo-photon lithography

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Microfabrication

Background:

  • Capillary-force-driven self-assembly is crucial for advanced materials manufacturing.
  • Traditional methods are limited by unidirectional assembly, restricting applications.
  • Novel approaches are needed to overcome these limitations.

Purpose of the Study:

  • To introduce a 4D microprinting technique for reversible and bidirectional self-assembly.
  • To demonstrate controlled microstructure shape and assembly behavior.
  • To enable new applications through dynamic material manipulation.

Main Methods:

  • Utilizing two-photon lithography for 4D microprinting.
  • Engineering asymmetric crosslinking densities in microstructures.
  • Investigating self-assembly in different evaporating solvents to achieve three distinct states.

Main Results:

  • Achieved reversible and bidirectional self-assembly of microstructures.
  • Demonstrated controlled thickness, curvature, and morphology unattainable with 3D printing.
  • Exhibited three switchable states: traditional clustering, stable curvature, and arbitrary 4D self-assembly.
  • Obtained distance-independent assembly with up to 100% yield.

Conclusions:

  • The 4D microprinting approach overcomes traditional self-assembly limitations.
  • Reversible and bidirectional assembly opens avenues for switchable wetting and dynamic microrobots.
  • This technology facilitates the creation of advanced materials with tunable properties and complex functionalities.