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Mostrando ítems 1-10 de 16
Artículo
Dielectrophoretic Force Equilibrium of Complex Particles
(American Physical Society, 2020)
In contrast to the commonly used spherical Janus particles, here we use engineered Janus particles that are fabricated by means of the photolithography technique for precise control over their geometry and coated regions. ...
Artículo
Wall Repulsion during Electrophoresis: Testing the Theory of Concentration-Polarization Electroosmosis
(AIP Publishing, 2023)
We experimentally study the repulsion of charged microscopic particles with the channel walls during electrophoresis in microfluidic devices. For low frequencies of the electric fields (< 10 kHz), this repulsion is mainly ...
Artículo
Scattering of Metal Colloids by a Circular Post under Electric Fields
(MDPI, 2023)
We consider the scattering of metal colloids in aqueous solutions by an insulating circular post under the action of an AC electric field. We analyze the effects on the particle of several forces of electrical origin: the ...
Artículo
Wall Repulsion of Charged Colloidal Particles during Electrophoresis in Microfluidic Channels
(American Physical Society, 2022)
Electrophoresis describes the motion of charged particles suspended in electrolytes when subjected to an external electric field. Previous experiments have shown that particles undergoing electrophoresis are repelled from ...
Artículo
Shaping liquid films by dielectrophoresis
(Cambridge University Press, 2021)
We present a theoretical model and experimental demonstration of thin liquid film deformations due to a dielectric force distribution established by surface electrodes. We model the spatial electric field produced by a ...
Artículo
Stationary Electro-osmotic Flow Driven by ac Fields around Insulators
(American Physical Society, 2021)
Electric fields are commonly used for manipulating particles and liquids in microfluidic systems. In this work, we report stationary electro-osmotic flow vortices around dielectric micropillars induced by ac electric fields ...
Artículo
Low-frequency electrokinetics in a periodic pillar array for particle separation
(Elsevier, 2023)
Deterministic Lateral Displacement (DLD) exploits periodic arrays of pillars inside microfluidic channels for high-precision sorting of micro- and nano-particles. Previously we demonstrated how DLD separation can be ...
Artículo
Continuous particle separation in microfluidics: Deterministic lateral displacement assisted by electric fields
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)
Artículo
Concentration-polarization electroosmosis near insulating constrictions within microfluidic channels
(American Chemical Society, 2021)
Electric fields are commonly used to trap and separate micro- and nanoparticles near channel constrictions in microfluidic devices. The trapping mechanism is attributed to the electrical forces arising from the nonhomogeneous ...
Artículo
Dynamics of Fixed-volume Pinned Films - Dealing with a Non-self-adjoint Thin-film Problem
(Cambridge University Press, 2023)
The use of thin liquid films has expanded beyond lubrication and coatings, and into applications in actuators and adaptive optical elements. In contrast to their predecessors, whose dynamics can be typically captured by ...