Chemistry-driven autonomous nanopore membranes

Area of Science:

• Nanotechnology
• Materials Science
• Electrochemistry

Background:

• Fabricating atomic-scale pores is difficult, limiting research on confined ion transport.
• Understanding molecular dynamics in nanoscale confinement is crucial for many scientific fields.

Purpose of the Study:

• To introduce a chemically controllable method for creating and manipulating nanoscale pores.
• To investigate ion transport and fluid dynamics in sub-nanometer channels.

Main Methods:

• Utilized a break-membrane approach with silicon nitride (SiN_x) membranes.
• Manipulated in-pore electrochemical reactions via transmembrane voltage to form and close pores.
• Performed ionic current measurements to analyze conductance features.

Main Results:

• Successfully fabricated and repeatedly controlled nanoscale pores using electrochemical reactions.
• Observed distinct ionic conductance, indicating ion dehydration and transport in sub-nanometer channels.
• Demonstrated a scalable platform capable of actuating multiple pores simultaneously.

Conclusions:

• The chemically controllable break-membrane approach provides a powerful tool for studying ion transport and fluid dynamics in extreme confinement.
• This technology has potential applications in single-molecule sensing, neuromorphic computing, and nanoreactor design.
• Advances fundamental understanding of nanoscale phenomena and opens new avenues for technological innovation.