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|Title:||Development of magnetoelectric CoFe2O4/poly(vinylidene fluoride) microspheres|
Martins, Pedro Libânio Abreu
Correia, D. M.
Sencadas, Vítor João Gomes Silva
Vilas, J. L.
León, L. M.
|Publisher:||Royal Society of Chemistry|
|Citation:||Goncalves, R., Martins, P., Correia, D. M., Sencadas, V., Vilas, J. L., Leon, L. M., . . . Lanceros-Mendez, S. (2015). Development of magnetoelectric CoFe2O4/poly(vinylidene fluoride) microspheres. RSC Advances, 5(45), 35852-35857. doi: 10.1039/c5ra04409j|
|Abstract(s):||Magnetoelectric microspheres based on piezoelectric poly(vinylidene fluoride) (PVDF) and magnetrostrictive CoFe2O4 (CFO), a novel morphology for polymer-based ME material, have been developed by an electrospray process. The CFO nanoparticles content in the (3-7 μm diameter) microspheres reaches values up to 27 wt.%, despite their concentration in the starting solution reaching values up to 70 wt.%. Additionally, the inclusion of magnetostrictive nanoparticles into the polymer spheres has no relevant effect on the piezoelectric β-phase content (≈60%), crystallinity (40%) and the onset degradation temperature (460º-465ºC) of the polymer matrix. The multiferroic microspeheres show a maximum piezoelectric reponse |d33|≈30 pC.N-1, leading to a magnetoelectric response of Δ|d33|≈5 pC.N-1 obtained when a 220 mT DC magnetic field was applied. It is also shown that the interface between CFO nanoparticles and PVDF (from 0 to 55%) has a strong influence on the ME response of the microspheres. The simplicity and the scalability of the processing method suggest a large application potential of this novel magnetoelectric geometry in areas such as tissue engineering, sensors and actuators.|
|Appears in Collections:||CDF - FCD - Artigos/Papers (with refereeing)|
CDQuim - Artigos (Papers)