CONCENTRATION DEPENDENCE OF STERN LAYER CAPACITANCES AND SURFACE EQUILIBRIUM CONSTANTS IN SILICA-BASED NANOFLUIDIC CHANNELS

Mathias Bækbo Andersen, J. Frey, Henrik Bruus, S Pennathur

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Fundamental understanding of the unique physics at the solid-liquid interface in nanofluidic channels is essential for the advancement of basic scientific knowledge and the development of novel applications for pharmaceuticals, environmental health and safety, energy harvesting and biometrics [1]. The current models used to describe surface phenomena in nanofluidics can differ by orders of magnitude from experimentally measured values [2]. To mitigate the discrepancies, we hypothesize that the Stern-layer capacitance Cs and the surface equilibrium constants pKa, vary with the composition of the solid-liquid interface. We quantify these dependencies combining theoretical modeling and nanofluidic capillary filling experiments.
    Original languageEnglish
    Title of host publicationµTAS 2010
    Publication date2010
    Pages1409-1411
    ISBN (Print)978-0-9798064-3-8
    Publication statusPublished - 2010
    Event14th International Conference on Miniaturized Systems for Chemistry and Life Sciences - Groningen, Netherlands
    Duration: 3 Oct 20107 Oct 2010
    Conference number: 14

    Conference

    Conference14th International Conference on Miniaturized Systems for Chemistry and Life Sciences
    Number14
    CountryNetherlands
    CityGroningen
    Period03/10/201007/10/2010

    Keywords

    • Cyanosilane surface coating
    • Nanofluidics
    • Zeta potential
    • Surface charge
    • Silica nanochannels

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