Article
Biochemistry & Molecular Biology
Patricia Gomes, Barbara Costa, Joao P. F. Carvalho, Paula I. P. Soares, Tania Vieira, Celia Henriques, Manuel Almeida Valente, Silvia Soreto Teixeira
Summary: Cancer is a leading cause of death worldwide and traditional treatments have limitations and severe side effects. Magnetic hyperthermia is an alternative method that can be used alone or in conjunction with chemotherapy or radiotherapy. The use of cobalt ferrite particles synthesized through an innovative biogenic sol-gel method was evaluated for its suitability in magnetic hyperthermia applications through thermal, structural, magnetic, and cytotoxic analyses.
Article
Materials Science, Ceramics
Andre de Oliveira Girao Maia, Francisco Gilvane Sampaio Oliveira, Carlos Henrique Nascimento Cordeiro, Edwalder Silva Teixeira, Erandir Brasil da Silva, Joao Maria Soares, Igor Frota de Vasconcelos, Jose Marcos Sasaki, Thomas Dumelow
Summary: This work synthesized superparamagnetic cobalt ferrite nanoparticles using a sol-gel method and characterized the samples using different instruments. Magnetic hardening and an increase in anisotropy constant were observed with increasing nanoparticle size. Additionally, a decrease in saturation magnetization due to the formation of magnetically dead layer on the surface was also observed.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Crystallography
Hector A. Chinchay-Espino, Gina M. Montes-Albino, Carlex M. Morales-Cruz, Segundo E. Dobbertin-Sanchez, Segundo Rojas-Flores
Summary: The effect of Co substitution on the structural and magnetic properties of BiFeO3 was studied, and Co-BiFeO3 nanopowders were successfully synthesized via the sol-gel method, exhibiting ferromagnetic properties at 15% Co doping.
Article
Polymer Science
Nina Shabelskaya, Sergey Sulima, Elena Sulima, Oleg Medennikov, Marina Kulikova, Tatyana Kolesnikova, Svetlana Sushkova
Summary: The article presents the synthesis of cobalt (II) ferrite magnetic nanoparticles and organic-inorganic composite materials based on it using the sol-gel method. Characterization techniques such as X-ray phase analysis, electron microscopy, and BET methods were used to analyze the properties of the materials. A mechanism for the formation of the composite materials is proposed, involving gelation, chelate complex reaction, and subsequent decomposition. The obtained composite materials have a significantly increased surface area and sufficient magnetic properties, making them suitable for various applications in medicine.
Article
Materials Science, Ceramics
Marcelo da Silva Mantini Viana, Thalita Marcolan Valverde, Breno Rocha Barrioni, Alfredo Miranda de Goes, Marcos Augusto de Sa, Marivalda de Magalhaes Pereira
Summary: This study obtained cobalt-containing nanoparticles with the potential to release pro-angiogenic ions using a sol-gel based method, which can be applied for tissue repair and tissue engineering.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Applied
Babak Pashaei, Afsoon Aghaei, Maryam Shaterian
Summary: In this study, cobalt ferrite (CoFe2O4) magnetic nanoceramics were synthesized using the sol-gel process. The nanoceramics were characterized by various analyses and were found to be an efficient catalyst for the oxidation of olefins to epoxides. The catalyst exhibited high selectivity, easy recovery, and reusability without a significant decrease in catalytic activity.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Aleksey A. Nikitin, Anastasiia V. Prishchepa, Ruslan A. Rytov, Vladimir P. Chekhonin, Maxim A. Abakumov
Summary: The study investigates the remote magneto-mechanical actuation of biomolecules under the influence of external magnetic fields using magnetic nanoparticles. The results demonstrate a nonmonotonic dependence of mechanical destruction on the size of nanoparticles, indicating the crucial role of magneto-dipole interactions between nanoparticles. This finding contributes to the fine-tuning of magnetic nanoparticle properties for specific magneto-mechanical tasks.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Morvarid Alipour Marjeghal, Arman Sedghi, Saeid Baghshahi
Summary: Strontium hexaferrite is a hard ferrite widely used as a permanent magnetic material due to its high anisotropy, high saturation magnetization, chemical stability, and corrosion resistance. The study found that the crystal size of strontium hexaferrite is significantly affected by the molar ratio of citric acid to metal nitrates. Increasing the molar ratio of citric acid improves the saturation magnetization and magnetic remanence magnetization while decreasing the coercive field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
S. Vivek, A. S. Kumar, C. S. Chitra Lekha, N. Kalarikkal, A. Banerjee, S. S. Nair
Summary: The study explores the exchange bias effects in inverted core-shell nanoparticles, showing diverse physical phenomena such as spin-glass characteristics and training effect. The crystallinity of the CFO shell influences the behavior of the core-shell nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Seyedeh Mansoureh Hashemi, Zahra Ataollahi, Saeed Hasani, Amir Seifoddini
Summary: The cobalt ferrite magnetic nanoparticles were synthesized using the sol-gel auto-combustion method with different amounts of egg white protein. The addition of albumin reduced the average crystallite size and increased the coercivity and saturation magnetization of the nanoparticles. The presence of albumin caused cation redistribution, affecting magnetic anisotropy and inversion degree.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Md Abdullah-Al-Mamun, M. S. Sarker, M. R. Hasan, M. M. Haque, F. A. Khan, M. M. Rahman, M. K. R. Khan
Summary: The study found that the Er content has a significant impact on the crystalline structure and magnetic properties of CoFe2-xErxO4 nanoparticles, optimizing material performance by reducing crystallite size and increasing coercivity.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Parvin Imanipour, Saeed Hasani, Amir Seifoddini, Marcin Nabialek
Summary: In this study, cobalt ferrite magnetic nanoparticles doped with zinc and vanadium were synthesized using the sol-gel auto-combustion method. The samples were characterized using various techniques, and the results showed that doping affected the crystal structure, grain size, and morphology of the synthesized particles, as well as the saturation magnetization and coercivity. These findings are of great importance for understanding the physical properties and applications of cobalt ferrite.
Article
Materials Science, Ceramics
Breno R. Barrioni, Sandhra M. de Carvalho, Parichart Naruphontjirakul, Elizabeth Norris, Nicole L. Kelly, John V. Hanna, Julian R. Jones, Marivalda de M. Pereira
Summary: Novel monodispersed spherical dense BGNPs with a diameter of 92 nm and cobalt as the pro-angiogenic ion were obtained using a modified Stober method. The controlled release of Co2+ ions in culture media indicated the great potential of these materials as intracellular ion delivery systems with therapeutic properties. The study confirmed the presence of Co2+ species and the role of Co and Ca as network modifiers in the silica glass through various analytical techniques.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yuruo Zheng, Ghulam Hussain, Shuyi Li, Shanta Batool, Xiawa Wang
Summary: In this study, nanoparticles of Co1-xRexFe2O4 and CoFe2-xRexO4 (0 <= x <= 0.05) were synthesized by the sol-gel method. The substitution of Re led to slightly increased lattice parameters and shift in Raman spectra peak positions. The surface Re exchange changed the coordination environment of metals and induced Fe-site structure distortion. The magnetic measurements showed that all samples exhibited ferromagnetic behavior across the entire temperature range.
Article
Biochemistry & Molecular Biology
Petrisor Samoila, Corneliu Cojocaru, Mihaela Simionescu, Gabriela Sacarescu, Gheorghe Roman, Andra-Cristina Enache, Liviu Sacarescu
Summary: This paper discusses the preparation and optical properties of a composite material that encapsulates cobalt spinel ferrite in a polysilane matrix. The material exhibits interesting optical properties and ferrimagnetic behavior. The study shows that the internal magnetic field strongly enhances the emission of polysilane. This research provides an interesting material basis for the development of new detection devices in the future.
