Short communication: A simple and accurate method of measuring the zeta-potential of microfluidic channels |
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| Authors: | Raúl Fernández-Mateo Pablo García-Sánchez Víctor Calero Antonio Ramos Hywel Morgan |
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| Institution: | 1. School of Electronics and Computer Science, University of Southampton, Southampton, United Kingdom;2. Depto. Electrónica y Electromagnetismo, Facultad de Física, Universidad de Sevilla, Sevilla, Spain |
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| Abstract: | 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. |
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| Keywords: | current-monitoring method electroosmosis PDMS zeta-potential |
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