Modulation of Electrokinetic Potentials Using Graphene-Based Surfaces and Variable Substrate Charge Density
Li Cheng,
Putian He,
Yongliang Dong
et al.
Abstract:Enhanced electrokinetic phenomena, manifested through
the observation
of a large streaming potential (V
s), were
obtained in microchannels with single-layer graphene (SLG)-coated
and few-layer graphene (FLG)-coated surfaces. In comparison to silicon
microchannels, the V
s obtained for a given
pressure difference along the channel (ΔP)
was higher by 75% for the graphene-based channels, with larger values
in the SLG case. Computational modeling was used to correlate the
surface charge density, tuned through plas… Show more
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