Solid-state nanopore fabrication via controlled dielectric breakdown: Progress and prospects

Area of Science:

• Biotechnology
• Materials Science
• Nanotechnology

Background:

• Solid-state nanopores are crucial for single-molecule analysis of biomolecules like DNA and proteins.
• Traditional nanopore fabrication methods are often expensive and complex.
• Controlled dielectric breakdown (CBD) is an in-situ technique for fabricating nanopores in insulating materials.

Purpose of the Study:

• To review the principles and advancements in controlled dielectric breakdown (CBD) for nanopore fabrication.
• To highlight strategies for improving the precision and scalability of CBD.
• To discuss future directions for CBD in single-molecule biosensing.

Main Methods:

• Analysis of dielectric breakdown mechanisms (thermal, electrical, chemical).
• Review of strategies for localized area thinning and electric field control.
• Examination of in-situ monitoring via leakage currents.

Main Results:

• CBD provides a low-cost, scalable alternative to lithography for nanopore fabrication.
• Advanced CBD techniques enable deterministic sub-2 nm nanopore formation with tunable morphology.
• CBD has evolved from a probabilistic method to a versatile fabrication platform.

Conclusions:

• Controlled dielectric breakdown is a rapidly advancing technique for scalable nanopore fabrication.
• CBD offers a promising platform for next-generation single-molecule biosensing and sequencing.
• Future research should focus on microfluidic integration and novel dielectric materials for CBD.