On Stochastic Reduction in Laser-Assisted Dielectric Breakdown for Programmable Nanopore Fabrication

Area of Science:

• Materials Science
• Nanotechnology
• Physics

Background:

• Controlled dielectric breakdown offers a path to accessible solid-state nanopore fabrication.
• Laser-assisted dielectric breakdown aids in controlling nanopore location and minimizing multiple pore formation.

Purpose of the Study:

• To develop a physical model for estimating single nanopore formation probability.
• To identify optimal laser power and electric field combinations for controlled nanopore fabrication.

Main Methods:

• Developed a physical model incorporating Weibull statistical parameters and laser-induced photothermal etching rates.
• Estimated single nanopore formation probability under varying laser power and electric field conditions.
• Validated model predictions with experimental data.

Main Results:

• The model successfully estimates nanopore formation probability.
• Experimental data align with model predictions.
• A combination of high laser power and low electric field statistically favors single nanopore formation at a specific location.

Conclusions:

• The developed physical model provides experimental insights for nanopore fabrication via laser-assisted dielectric breakdown.
• This method can enhance accessibility to solid-state nanopores and their sensing applications.