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Short communication: A simple and accurate method of measuring the zeta‐potential of microfluidic channels
Author(s) -
FernándezMateo Raúl,
GarcíaSánchez Pablo,
Calero Víctor,
Ramos Antonio,
Morgan Hywel
Publication year - 2022
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.202100267
Subject(s) - zeta potential , electrolyte , conductivity , microfluidics , simple (philosophy) , pulmonary surfactant , materials science , analytical chemistry (journal) , channel (broadcasting) , chromatography , biological system , chemistry , nanotechnology , computer science , electrode , telecommunications , philosophy , biochemistry , epistemology , nanoparticle , biology
We describe an improved method for determining the electroosmotic mobility and zeta potential of surfaces based on a current‐monitoring method. This technique eliminates the requirement for measurements of channel dimensions and sample conductivities, leading to a simple high precision measurement. The zeta potential of PDMS is measured for native surfaces and surfaces treated with a nonionic surfactant in low‐conductivity electrolytes.