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A facile multi-material direct laser writing strategy.

Andrew C Lamont1, Michael A Restaino1, Matthew J Kim1

  • 1Department of Mechanical Engineering, Fischell Department of Bioengineering, and Robert E. Fischell Institute for Biomedical Devices, Maryland Robotics Center, University of Maryland, 2152 Glenn L. Martin Hall, College Park, Maryland 20740, USA. rsochol@umd.edu.

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A new microfluidic multi-material direct laser writing (DLW) method enables precise 3D printing of complex microstructures using multiple materials. This advancement improves material registration accuracy for advanced applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Additive Manufacturing

Background:

  • Direct laser writing (DLW) is a 3D fabrication technique with submicron precision.
  • Current DLW methods struggle with multi-material microstructures, limiting applications.
  • Achieving high registration accuracy in multi-material printing remains a challenge.

Purpose of the Study:

  • To develop an accessible microfluidic multi-material direct laser writing (μFMM-DLW) strategy.
  • To enhance the precision and material registration accuracy in 3D multi-material printing.
  • To enable the fabrication of complex, multi-material microsystems.

Main Methods:

  • Utilized a microfluidic approach integrated with direct laser writing.
  • Developed a strategy for precise deposition and registration of multiple materials in 3D.
  • Characterized the material registration accuracy in both X and Y dimensions.

Main Results:

  • Achieved average material registration accuracies of 100 ± 70 nm (ΔX) and 190 ± 170 nm (ΔY).
  • Demonstrated successful printing of 3D microstructures using up to five different materials.
  • Showcased significant improvement in accuracy compared to conventional multi-material DLW.

Conclusions:

  • The μFMM-DLW strategy offers a viable solution for advanced multi-material 3D microfabrication.
  • This technique facilitates the creation of geometrically complex microsystems.
  • Potential applications include photonics, meta-materials, and 3D cell biology research.