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Updated: May 6, 2026

Development of a 3D Graphene Electrode Dielectrophoretic Device
Published on: June 22, 2014
Modulation of Electrokinetic Potentials Using Graphene-Based Surfaces and Variable Substrate Charge Density
Li Cheng1, Putian He2, Yongliang Dong2
1Department of Mechanical Engineering, University of California San Diego, La Jolla, California 92093, United States.
Abstract:
Enhanced electrokinetic phenomena, manifested through the observation of a large streaming potential (Vs), were obtained in microchannels with single-layer graphene (SLG)-coated and few-layer graphene (FLG)-coated surfaces. In comparison to silicon microchannels, the Vs 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 plasma processing, and related zeta potential to measured Vs. The implications related to deploying lower dimensional material surfaces for modulating electrokinetic flows were investigated.
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