Document Type
Article
Publication Date
4-23-2022
Department 1
Physics
Abstract
We demonstrate a non-stereoscopic, video-based particle tracking system with optical tweezers to study fluid flow in 3D in the vicinity of glass nanopores. In particular, we used the quadrant interpolation algorithm to extend our video-based particle tracking to displacements out of the trapping plane of the tweezers. This permitted the study of flow from nanopores oriented at an angle to the trapping plane, enabling the mounting of nanopores on a micromanipulator with which it was then possible to automate the mapping procedure. Mapping of the voltage driven flow in 3D volumes outside nanopores revealed polarity dependent flow fields. This is in agreement with the model of voltage driven flow in conical nanopores depending on the interaction of distinct flows within the nanopore and along the outer walls.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
DOI
10.1063/5.0083054
Version
Version of Record
Recommended Citation
J. Mc Hugh, A.L. Thorneywork, K. Andresen, U.F. Keyser. 3D flow field measurements outside nanopores, Review of Scientific Instruments, 93, 5. (2022)