Data for Pulsed-field travelling-wave magnetophoresis of magnetic microparticles I: the trigonometric model
Description
In rotating-field travelling-wave magnetophoresis (RF-TWM), superparamagnetic microparticles (SPPs) are transported in liquids close to a surface by superposing static periodic magnetic field landscapes (MFLs) emerging from topographic micromagnets or stable domain patterns by a rotating external magnetic field. In this contribution we replace the rotating field with individual periodic field pulses along the coordinate axes, enabling extensive active particle motion control by varying amplitudes, frequencies, and phase relations of the pulses. We develop a model to approximate the dynamic potential-energy landscapes (dPEL) for SPPs that drive particle motion in pulsed-field travelling-wave magnetophoresis (PF-TWM). The model accounts for MFL variations with distance to the surface for a specific periodic MFL and for field superpositions due to neighboring magnetic charges in the magnetic patterns creating the MFL. We show that the ratio between amplitudes of sinusoidal pulses along two orthogonal coordinate axes is a parameter that can be used to switch between a constant lateral shift-velocity of the dPEL minima for equal amplitudes and large periodic shift-velocity variations of the minima. The calculation results are corroborated by SPPs adiabatically transported with the dPEL minima as probes for the dynamically varying positions of the PEL minima. The datasets uploaded here contain the results of the calculations as h5-files and the videos of the dynamically changing external field pulse amplitudes and potential energy landscapes, the codes for the calculations, and the microscope videos of the experiments recorded during this work.
Files
Document
Type
Size
License
Except where otherwised noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International