Ionic conductivity in nanopipettes: experiment and model
S. Yu. Lukashenko,
O. M. Gorbenko,
M. L. Felshtyn,
I. D. Sapozhnikov,
D. A. Kirilenko,
S. V. Pichakhchi,
M. V. Zhukov,
A. O. Golubok https://doi.org/10.17586/2220-8054-2025-16-4-441-449
Abstract
This work investigates ion transport in glass nanopipettes with tip diameters in the range of 80–100 nm, filled with phosphate-buffered saline. A combination of experimental measurements and theoretical modeling is employed. A coupled Poisson-Nernst-Planck-Navier-Stokes model is used to describe the ion transport, incorporating electroosmotic flow, electrophoresis and interionic effects. The theoretical results are in good agreement with experimental current to voltage characteristics. Comparison between modeled and measured data enables estimation of nanopipette geometry with good accuracy. The simulations also reveal characteristic spatial distributions of ionic flow in the aperture area of the nanopipette tip, governed by electroosmosis and the tip shape. These findings provide insights into nanoscale ion transport phenomena relevant for analytical and biological applications.
About the Authors
S. Yu. Lukashenko
Institute for Analytical Instrumentation of the Russian Academy of Sciences
Russian Federation
Russian Federation
Stanislav Yu. Lukashenko
Saint Petersburg
O. M. Gorbenko
Institute for Analytical Instrumentation of the Russian Academy of Sciences
Russian Federation
Russian Federation
Olga M. Gorbenko
Saint Petersburg
M. L. Felshtyn
Institute for Analytical Instrumentation of the Russian Academy of Sciences
Russian Federation
Russian Federation
Mikhail L. Felshtyn
Saint Petersburg
I. D. Sapozhnikov
Institute for Analytical Instrumentation of the Russian Academy of Sciences
Russian Federation
Russian Federation
Ivan D. Sapozhnikov
Saint Petersburg
D. A. Kirilenko
Ioffe Institute
Russian Federation
Russian Federation
Demid A. Kirilenko
Saint Petersburg
S. V. Pichakhchi
Institute for Analytical Instrumentation of the Russian Academy of Sciences
Russian Federation
Russian Federation
Stepan V. Pichakhchi
Saint Petersburg
M. V. Zhukov
Institute for Analytical Instrumentation of the Russian Academy of Sciences
Russian Federation
Russian Federation
Mikhail V. Zhukov
Saint Petersburg
A. O. Golubok
Institute for Analytical Instrumentation of the Russian Academy of Sciences
Russian Federation
Russian Federation
Alexander O. Golubok
Saint Petersburg
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Review
For citations:
Lukashenko S.Yu., Gorbenko O.M., Felshtyn M.L., Sapozhnikov I.D., Kirilenko D.A., Pichakhchi S.V., Zhukov M.V., Golubok A.O. Ionic conductivity in nanopipettes: experiment and model. Nanosystems: Physics, Chemistry, Mathematics. 2025;16(4):441-449. https://doi.org/10.17586/2220-8054-2025-16-4-441-449
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