Optical response of magnetically actuated biocompatible membranes

Abstract

Optical responses of biocompatible nanostructured magneto-elastic membranes, magnetically actuated, were experimentally characterized and fitted using a magneto-mechanical and optical model.

Cancer treatment by magneto-mechanical effect of particles, a review

“…However, the author 36 mentioned the contrast with ferromagnetic vortex discs usually known to show a reduction in susceptibility for a decrease in diameter or an increase in length, 77 as likewise experimented in our studies. 55,83 Nevertheless, this increase is here associated with an increase of remanence. 36 Calculations of the force applied to the cells show an induced force of the order of a few tens of pN for all diameters studied, sufficient to cause apoptosis of the cells (see in Section 3, below).…”

Magneto-mechanically actuated microstructures to efficiently prevent bacterial biofilm formation

“…Magnets of various compositions and dimensions could be considered to exert different ranges of magnetic forces. Depending on the pursued application, it is possible to either locally create larger gradients, thus producing larger forces (magnetic tips for example) or exert larger forces at longer distances (such as the magnet used for this study) 31 . The magnet used in this study is considered as a good compromise for generating sufficient forces on the cantilevers in experiments involving requirements linked to liquid bacterial cultures.…”

“…The magnet is modelled by the two surfaces of opposite charges, perpendicular to M MAG , separated by the distant h, each of them bearing a constant charge density σ = + /−M MAG . Equations of B Z (0,0,Z) and dB Z /d Z (0,0,Z) are described in Ref 31 . The circular section of the magnet is defined by 2A = 2B and (2A × 2B = π .…”

Magnetic particles for triggering insulin release in INS-1E cells subjected to a rotating magnetic field

“…The magnetic properties of these MPs have been described and modelled previously, as reported in our previous work. 17 To decrease MP agglomeration after PMMA lift-off and to improve their biocompatibility, Au/Fe 20 Ni 80 /Au MPs were functionalised with self-assembled monolayers of thiol molecules possessing amine terminal groups (1 mM of HS-C 11 -EG 6 -NH 2 ). For this, first, they were washed twice in ethanol.…”

“…This can be explained by possible membrane vibrations due to the air flux generated during the rotation of the wheel supporting the magnets. In our previous work, 17 we implemented an analytical model similar to the one described previously 36 to quantify the MEM profile and deformation at any point according to the applied pressure/force. This model was successfully validated by optical experiments in which the MEM was employed as a diffraction grating.…”