Enabling Scalable Nanoscale 3D Printing via Laser-Driven Termination

Area of Science:

• Nanotechnology
• Materials Science
• Additive Manufacturing

Background:

• Nanoscale 3D printing is crucial for advanced optics and electronics.
• Current meniscus-guided writing methods face scalability and throughput challenges.
• Existing termination mechanisms limit ink viscosity, concentration, and printing speed.

Purpose of the Study:

• To develop a novel termination method for nanoscale 3D printing.
• To overcome the limitations of conventional retraction-based termination.
• To enhance manufacturing throughput and material versatility.

Main Methods:

• Integrated a 405 nm focused laser with optical microscopy for on-demand thermal ablation.
• Utilized laser-induced thermal ablation to sever printed nanostructures.
• Replaced physical separation with a laser-based thermal process.

Main Results:

• Achieved a 100-fold increase in printing speed (up to 1000 µm/s).
• Enabled printing with high-concentration inks (> 1.6 mg/mL), decoupling termination from ink rheology.
• Demonstrated precise height control and fabrication of freestanding tilted structures.
• Confirmed method versatility across various materials and substrates.

Conclusions:

• The laser-driven termination method offers a robust and scalable solution for nanoscale 3D printing.
• This approach significantly enhances manufacturing throughput and material choices.
• Provides unprecedented geometric freedom for complex 3D nanostructure fabrication.