Local probing of magnetoelectric properties of PVDF/Fe₃O₄electrospun nanofibers by piezoresponse force microscopy

Abstract

The coupling of magnetic and electric properties in polymer-based magnetoelectric composites offers new opportunities to develop contactless electrodes, effectively without electrical connections, for less-invasive integration into devices such as energy harvesters, sensors, wearable and implantable electrodes. Understanding the macroscale-to-nanoscale conversion of the properties is important, as nanostructured and nanoscale magnetoelectric structures are increasingly fabricated. However, whilst the magnetoelectric effect at the macroscale is well established both theoretically and experimentally, it remains unclear how this effect translates to the nanoscale, or vice versa. Here, PVDF/FeO polymer-based composite nanofibers are fabricated using electrospinning to investigate their piezoelectric and magnetoelectric properties at the single nanofiber level.

Piezoelectric materials as stimulatory biomedical materials and scaffolds for bone repair

“…These materials have been shown to be effective in different applications such as drug delivery, tissue engineering and targeted cell manipulation [228][229][230][231][232][233][234][235][236].…”

Magnetic Nanofibers: Unique Properties, Fabrication Techniques, and Emerging Applications

“…In addition, they also had good biocompatibility and low toxicity showing great potential in the biomedical applications and photoelectric devices. In a similar way, a series of polymer‐based composite NFs were also prepared, such as polyvinylidene fluoride/Fe 3 O 4 , poly(methyl methacrylate)/Fe 3 O 4 , and poly(lactic acid) (PLA)/CNTs/Fe 3 O 4 NFs …”

Flexible piezoelectric cum‐ electromagnetic ‐absorbing multifunctional nanocomposites based on electrospun poly (vinylidene fluoride) incorporated with synthesized porous core‐shell nanoparticles

“…[47][48][49] For instance, Fe 3 O 4 NPs have a negative surface charge and can increment the β-phase in PVDF, hence enhancing its piezoelectricity. 50 This can be assigned to the interactions occurring between the negatively-charged NPs and the positively charged CH 2 group of the polymer, promoting the nucleation of the polar β-crystals. Fe 3 O 4 NPs alone cannot fulfill all the requirements of the intended fibers; in this content, the deposition of a dielectric nanostructure on the core magnetic nanoparticles sounds essential.…”