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Mostrando ítems 21-30 de 33
Artículo
The charged bouncing ball: An experimental model for period-doubling bifurcation
(IOP Publishing Ltd., 1997-03-10)
This paper presents an experimental and theoretical study of the dynamics of a conducting ball in a poorly conducting liquid subjected to an electric field. When the applied voltage is constant the ball bounces regularly ...
Artículo
Electrorotation of semiconducting microspheres
(American Physical Society, 2019)
We study experimentally the electrorotation (ROT) of semiconducting microspheres. ZnO microspheres obtained by a hydrothermal synthesis method are dispersed in KCl aqueous solutions and subjected to rotating electric fields. ...
Artículo
An automated apparatus for measuring the tensile strength and compressibility of fine cohesive powders
(American Institute of Physics, 2000)
This paper describes an apparatus based on a novel use of a powder bed, whereby the relationship between consolidation stress, tensile strength, and free volume of fine powder is measured. The powder to be tested is first ...
Artículo
Short communication: A simple and accurate method of measuring the zeta-potential of microfluidic channels
(Wiley-Blackwell, 2021)
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 ...
Artículo
Flow Regimes in Fine Cohesive Powders
(American Physical Society, 1999)
Granular materials exhibit several regimes of behavior: plastic, inertial, fluidized, and entrained flow, but not all materials can pass through all of these states. Our concern is with the criteria that determine the ...
Artículo
AC electrokinetic biased deterministic lateral displacement for tunable particle separation
(Royal Society of Chemistry, 2019)
We describe a novel particle separation technique that combines deterministic lateral displacement (DLD) with orthogonal electrokinetic forces. DLD is a microfluidic technique for continuous flow particle separation based ...
Artículo
Dipolophoresis and Travelling-Wave Dipolophoresis of Metal Microparticles
(MDPI, 2020)
We study theoretically and numerically the electrokinetic behavior of metal microparticles immersed in aqueous electrolytes. We consider small particles subjected to non-homogeneous ac electric fields and we describe their ...
Artículo
Pumping of liquids with traveling-wave electroosmosis
(AIP Publishing, 2005)
Net flow of electrolyte induced by a traveling-wave electric potential applied to an array of microelectrodes is reported. Two fluid flow regimes have been observed: at small-voltage amplitudes the fluid flow follows the ...
Artículo
Modeling the AC Electrokinetic Behavior of Semiconducting Spheres
(MDPI, 2019-01)
We study theoretically the dielectrophoresis and electrorotation of a semiconducting microsphere immersed in an aqueous electrolyte. To this end, the particle polarizability is calculated from first principles for arbitrary ...
Artículo
Particle Finder: a Simple Particle Detection Tool for Continuous-flow Systems
(Springer Nature, 2023)
We describe a user-friendly, open source software for single-particle detection/counting in a continuous-flow. The tool automatically processes video images of particles, including pre-conditioning, followed by size-based ...