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Voxels Optimization in 3D Laser Nanoprinting.

Yahya Bougdid1,2, Zouheir Sekkat3,4,5

  • 1Department of Chemistry, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco.

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|June 28, 2020
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Summary
This summary is machine-generated.

Optimizing laser spot position in 3D laser nanoprinting is key to controlling voxel size and achieving high-resolution micro/nano-structures. This study reveals how laser penetration depth influences voxel dimensions, enabling sub-100 nm feature fabrication.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optical Engineering

Background:

  • Voxels are fundamental building blocks in 3D laser nanoprinting, dictating the resolution of micro/nano-structures.
  • Understanding voxel size dependence on fabrication parameters is crucial for advancing 3D printing technology.

Purpose of the Study:

  • To investigate the relationship between laser focal spot position (z-position) and voxel size in 3D laser nanoprinting.
  • To determine the minimum achievable voxel dimensions near the substrate/resin interface.
  • To explore the fabrication of sub-diffraction-limited nano-features using controlled voxel truncation.

Main Methods:

  • Utilizing two-photon absorption in a photopolymerizable resin.
  • Systematically varying the laser focal spot's position relative to the cover glass/resin interface (z-direction).
  • Analyzing the lateral and longitudinal dimensions of fabricated voxels.

Main Results:

  • The minimum lateral and longitudinal voxel sizes are dependent on the laser focal spot's penetration depth into the resin.
  • Truncated voxels, achieved through partial overlap of the laser spot and resin, enable the creation of features beyond the diffraction limit.
  • Demonstrated fabrication of nano-features with sizes approaching 100 nm.

Conclusions:

  • Laser focal spot positioning is a critical factor in controlling voxel geometry and achieving high spatial resolution in 3D nanoprinting.
  • The controlled fabrication of truncated voxels offers a pathway to surpass traditional diffraction limits in 3D nano-fabrication.
  • This research provides fundamental insights into optimizing 3D nanoprinting for industrial applications requiring precise micro/nano-scale structures.