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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.
Scientific Reports
|June 28, 2020
Summary
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.
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.
