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Push-Button Method To Create Nanopores Using a Tesla-Coil Lighter.

Y M Nuwan D Y Bandara1, Buddini I Karawdeniya1, Jason R Dwyer1

  • 1Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States.

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|August 29, 2019
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Summary
This summary is machine-generated.

A new Tesla-coil-assisted method (TCAM) fabricates nanoscale ionic conductors and nanopores in silicon nitride films. This low-overhead technique offers tunable ionic conductance for single-molecule sensing applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Controlled dielectric breakdown (CDB) is a key method for fabricating nanofluidic channels and nanopores.
  • These nanostructures are crucial for single-molecule sensing and ionic circuit construction.
  • Conventional CDB methods require specific laboratory setups and electrolyte solutions.

Purpose of the Study:

  • To introduce a novel, low-overhead method for fabricating nanoscale ionic conductors using a Tesla-coil lighter.
  • To investigate the properties and tunability of nanopores created by this new technique.
  • To demonstrate the utility of TCAM-fabricated nanopores in molecular sensing.

Main Methods:

  • A hand-held Tesla-coil lighter was employed to induce controlled dielectric breakdown (CDB) in a thin silicon nitride membrane.
  • Modifications to conventional CDB included using water instead of electrolyte and discrete voltage applications to increase circuit resistance.
  • The Tesla-coil-assisted method (TCAM) was developed and optimized.

Main Results:

  • TCAM successfully fabricated nanofluidic channels and nanopores with diameters of approximately 10 nm and smaller.
  • Ionic conductance was tunable by adjusting the number of voltage applications.
  • Nanopores generated by TCAM exhibited different conductance-pH characteristics compared to conventional CDB, indicating altered surface chemistry.
  • Sensing experiments with λ-DNA demonstrated comparable translocation signals to those obtained with other solid-state nanopore fabrication methods.

Conclusions:

  • The Tesla-coil-assisted method (TCAM) provides a flexible and accessible approach for fabricating nanoscale ionic conductors.
  • TCAM-generated nanopores offer tunable properties and functional capabilities suitable for advanced sensing applications.
  • This method expands the toolkit for creating nanostructures for nanotechnology and materials science research.