Applications of magnetic and multiferroic core/shell nanostructures and their physical properties

Abstract

The potential of nanotechnology in the biomedical field has been crucial for contributing to the possibility of efficiently meeting present necessities with novel materials. Over the last few decades, nanostructures with a core/shell structure have attracted significant attention because of the possibility of changing their physical properties by varying their chemistry and geometry. These structures have become relevant in targeted therapy (drug delivery and treatments to complement chemotherapy and radiotherapy), imaging and in the stimulation of cellular functions. Thus in this paper the current development of core/shell nanostructures is reviewed, emphasizing the physical properties of those that have been proposed as potentially having biomedical applications, which are based in a magnetic behavior or in a mixture of magnetic and electric (multiferroic) phenomena.

Morphology of Bi₂O₃ Nanowires and Nanoflowers in the Synthesis of MnBi Alloys

“…Some particles appear as small dark spots embedded on the surface. Moreover, a bunch of flakes and wires are observed on some surfaces similar to the previous report on Bi 2 O 3 nanowires [8]. Interestingly, as shown in Fig.…”

Supercapacitors in Motion: Autonomous Microswimmers for Natural‐Resource Recovery

“…The XRD of the nGF swimmers showed a broad (002) peak at 2 θ =25.4, which translates to an interlayer distance of 0.34 nm (Figure c) . The Bi microswimmers contain a bismuth phase with strong diffraction peaks, confirming the rhombohedral crystal structure (Figure d; crystallographic parameters: α = β =90°; γ =120°, a = b =4.55 Å, c =11.86 Å) . Bi is likely to oxidize and hence, peaks of an oxidized phase (bismuth(III) oxide, Bi 2 O 3 ) were also observed in the X‐ray diffractogram.…”

Biosensors and Drug Delivery in Oncotheranostics Using Inorganic Synthetic and Biogenic Magnetic Nanoparticles

“…), but their use in living organisms is difficult due to their rapid oxidation and potential cytotoxicity. Multiferroic magnetoelectric (ME) materials such as cobalt ferrite (CoFe 2 O 4 )/barium titanate (BaTiO 3 ) nanoparticles have been used for numerous applications, such as biosensors and drug delivery [ 37 , 38 , 39 , 40 ]. Their important feature is the presence of a cross-coupling between the electrical and magnetic phases to combine the properties of the individual phases.…”