Electric fields enable tunable surfactant transport to microscale fluid interfaces.
basic_science · Level V
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- Record sourced from PubMed, PMID 31574733.
- Also identified by DOI 10.1103/PhysRevE.100.023114.
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Abstract
The transport dynamics of oil-soluble surfactants to oil-water interfaces are quantified using a custom-built electrified capillary microtensiometer platform. Dynamic interfacial tension measurements reveal that surfactant transport is enhanced under a dc electric field, due to electro-migration of charge carriers in the oil toward the interface. Notably, this enhancement can be precisely tuned by altering the field strength and temporal scheduling. We demonstrate electric fields as a new parameter to manipulate surfactant transport to microscale fluid-fluid interfaces.