Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-7437
Authors: | Niu, Ran Khodorov, Stanislav Weber, Julian Reinmüller, Alexander Palberg, Thomas |
Title: | Large scale micro-photometry for high resolution pH-characterization during electro-osmotic pumping and modular micro-swimming |
Online publication date: | 15-Jul-2022 |
Year of first publication: | 2017 |
Language: | english |
Abstract: | Micro-fluidic pumps as well as artificial micro-swimmers are conveniently realized exploiting phoretic solvent flows based on local gradients of temperature, electrolyte concentration or pH. We here present a facile micro-photometric method for monitoring pH gradients and demonstrate its performance and scope on different experimental situations including an electro-osmotic pump and modular micro-swimmers assembled from ion exchange resin beads and polystyrene colloids. In combination with the present microscope and DSLR camera our method offers a 2 μ m spatial resolution at video frame rate over a field of view of 3920 × 2602 μ m 2 . Under optimal conditions we achieve a pH-resolution of 0.05 with about equal contributions from statistical and systematical uncertainties. Our quantitative micro-photometric characterization of pH gradients which develop in time and reach out several mm is anticipated to provide valuable input for reliable modeling and simulations of a large variety of complex flow situations involving pH-gradients including artificial micro-swimmers, microfluidic pumping or even electro-convection. |
DDC: | 530 Physik 530 Physics |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 08 Physik, Mathematik u. Informatik |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-7437 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/3.0/ |
Journal: | New journal of physics 19 11 |
Pages or article number: | Art. 115014 |
Publisher: | IOP |
Publisher place: | London |
Issue date: | 2017 |
ISSN: | 1367-2630 |
Publisher URL: | http://dx.doi.org/10.1088/1367-2630/aa9545 |
Publisher DOI: | 10.1088/1367-2630/aa9545 |
Appears in collections: | DFG-OA-Publizieren (2012 - 2017) |
Files in This Item:
File | Description | Size | Format | ||
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large_scale_microphotometry_f-20220714110252934.pdf | 1.77 MB | Adobe PDF | View/Open |