Magnetic and Optical Characterization of Cobalt Ferrite–Barium Titanate Core–Shell for Biomedical Applications

Hossain, Shadeeb; Hossain, Shamera

doi:10.1109/tmag.2021.3140037

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…Further studies on barium titanate ceramics have demonstrated apatite-forming ability being dependent on the polarity or partial charge of the surface, with positively charged surfaces showing no bioactivity while negatively charged surfaces were able to bond cations such as Ca 2+ , subsequently allowing the typical process of apatite formation of chemically derived titanates to occur [33,241–243]. Furthermore, although not covered in this review, the use of barium titanate materials for medical sensing applications is becoming an increasingly attractive research area [244–246].…”

Section: Modifiable Titanate Structures Based On Ion-exchangeability ...mentioning

confidence: 99%

Developing alkaline titanate surfaces for medical applications

Wadge

McGuire

Thomas

et al. 2023

International Materials Reviews

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Improving the surface of medical implants by plasma spraying of a hydroxyapatite coating can be of critical importance to their longevity and the patient's convalescence. However, residual stresses, cracking, undesired crystallisation and delamination of the coating compromise the implants lifetime. A promising alternative surface application is an alkali-chemical treatment to generate bioactive surfaces, such as sodium and calcium titanate and their derivatives. Such surfaces obviate the need for high temperatures and resulting micro-crack formation and potentially improve the bioactive and bone integration properties through their nanoporous structures. Also, metallic ions such as silver, gallium and copper can be substituted into the titanate structure with the potential to reduce or eliminate the infections. This review examines the formation and mechanisms of bioactive/antibacterial alkaline titanate surfaces, their successes and limitations, and explores the future development of implant interfaces via multifunctional titanate surfaces on Ti-based alloys and on alternative substrate materials.

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Section: Modifiable Titanate Structures Based On Ion-exchangeability ...mentioning

confidence: 99%

Developing alkaline titanate surfaces for medical applications

Wadge

McGuire

Thomas

et al. 2023

International Materials Reviews

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“…This is due to its unique dielectric properties in the tetragonal phase with the P4mm space group [30][31][32][33]. In order to design novel multiferroic composites based on barium titanate, ferrites are one of the ideal candidates due to their attractive magnetic properties [25,30,31,[33][34][35][36][37][38]. Sintering is a required process for synthesis which primarily assures better mechanical coupling between ferrite and ferroelectric grains, while also promoting more pronounced magnetoelectric signals [39].…”

Section: Introductionmentioning

confidence: 99%

BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

et al. 2023

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To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ferroelectric properties were investigated. The optimal phase composition in the BaTiO3/NiFe2O4 composite, sintered at 1150 °C, resulted in a wide frequency range stability. Additionally, particular phase composition indicates favorable properties such as low conductivity and ideal-like hysteresis loop behavior. The favorable properties of BaTiO3/NiFe2O4 make this particular composite an ideal material choice for further studies on applications of multi-ferroic devices.

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“…The octahedral BO 6 experiences distortion and rotation, the effects of which become more substantial with smaller A-site cations [44]. This enhances the electrical resistance, which affects the total catalytic activity for oxygen reduction [45][46][47]. According to Sunarso et al [48], Cobalt (Co)-based perovskites have the highest current density and the best onset potential for reducing oxygen.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Photocatalytic Activity and Microstructural Growth of Cobalt-Substituted Ba1−xCoxTiO3 {x = 0, …, 1} Heterostructure

et al. 2023

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The photocatalytic degradation process and absorption kinetics of the aqueous solution of the Cibacron Brilliant Yellow 3G-P dye (Y) were investigated under UV-Vis light. Pure barium titanate BaTiO3 (BT) and cobalt ion-substituted barium Ba1−xCoxTiO3 (x = 0, …, 1) nano-compound powders (BCT) were synthesized using the sol–gel method and colloidal solution destabilization, and utilized as photocatalysts. The powder X-ray diffraction (PXRD) crystal structure analysis of the BT nanoparticles (NPs) revealed a prominent reflection corresponding to the perovskite structure. However, impurities and secondary phase distributions were qualitatively identified in the PXRD patterns for x ≥ 0.2 of cobalt substitution rate. Rietveld refinements of the PXRD data showed that the BCT nano-compound series undergoes a transition from perovskite structure to isomorphous ilmenite-type rhombohedral CoTiO3 (CT) ceramic. The nanoparticles produced displayed robust chemical interactions, according to a Fourier transform infrared spectroscopy (FTIR) analysis. The BT and BCT nanoparticles had secondary hexagonal phases that matched the PXRD results and small aggregated, more spherically shaped particles with sizes ranging from 30 to 114 nm, according to transmission electron microscopy (TEM). Following a thorough evaluation of BCT nano-compounds with (x = 0.6), energy-dispersive X-ray (EDX) compositional elemental analysis revealed random distributions of cobalt ions. Through optical analysis of the photoluminescence spectra (PL), the electronic structure, charge carriers, defects, and energy transfer mechanisms of the compounds were examined. Due to the cobalt ions being present in the BT lattice, the UV-visible absorption spectra of BCT showed a little red-shift in the absorption curves when compared to pure BT samples. The electrical and optical characteristics of materials, such as their photon absorption coefficient, can be gathered from their UV-visible spectra. The photocatalytic reaction is brought about by the electron–hole pairs produced by this absorption. The estimated band gap energies of the examined compounds, which are in the range of 3.79 to 2.89 eV, are intriguing and require more investigation into their potential as UV photocatalysts. These nano-ceramics might be able to handle issues with pollution and impurities, such as the breakdown of organic contaminants and the production of hydrogen from water.

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Magnetic and Optical Characterization of Cobalt Ferrite–Barium Titanate Core–Shell for Biomedical Applications

Cited by 6 publications

References 33 publications

Developing alkaline titanate surfaces for medical applications

Developing alkaline titanate surfaces for medical applications

BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

Enhancement of Photocatalytic Activity and Microstructural Growth of Cobalt-Substituted Ba1−xCoxTiO3 {x = 0, …, 1} Heterostructure

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