Synthesis and characterization of CoFe2O4–PVP nanocomposites

Mateo-Mateo, Cintia; Vázquez–Vázquez, C.; Buján-Núñez, M.C.; López‐Quintela, M. Arturo; Serantes, David; Baldomir, D.; Rivas, José

doi:10.1016/j.jnoncrysol.2008.05.071

Cited by 13 publications

(4 citation statements)

References 10 publications

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“…151 Rivas and co-workers prepared PVP-CoFe 2 O 4 nanocomposites under dilute PVP conditions (ferriteto-PVP mass ratio < 0.1) by solvothermal decomposition of Co(acac) 3 and Fe(acac) 3 . 152 These researchers noticed different magnetic behaviours among the CoFe 2 O 4 -PVP nanocomposites prepared using small or large CoFe 2 O 4 NPs. Hollow CoFe 2 O 4 spheres composed of smaller NPs were synthesized solvothermally with either PVP or PEG, together with oleic acid, NaAc, FeCl 3 and CoCl 2 at 200 o C. 153 A solvothermal route was used also for the preparation of Co 0.8 Ni 0.2 Fe 2 O 4 NPs with EG as solvent.…”

Section: Pvp In the Synthesis Of Metal Oxide Npsmentioning

confidence: 99%

Polyvinylpyrrolidone (PVP) in nanoparticle synthesis

et al. 2015

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Colloidal synthesis offers a route to nanoparticles (NPs) with controlled composition and structural features. This Perspective describes the use of polyvinylpyrrolidone (PVP) to obtain such nanostructures. PVP can serve as a surface stabilizer, growth modifier, nanoparticle dispersant, and reducing agent. As shown with examples, its role depends on the synthetic conditions. This dependence arises from the amphiphilic nature of PVP along with the molecular weight of the selected PVP. These characteristics can affect nanoparticle growth and morphology by providing solubility in diverse solvents, selective surface stabilization, and even access to kinetically controlled growth conditions. This Perspective includes discussions of the properties of PVP-capped NPs for surface enhanced Raman spectroscopy (SERS), assembly, catalysis, and more. The contribution of PVP to these properties as well as its removal is considered. Ultimately, the NPs accessed through the use of PVP in colloidal syntheses are opening new applications, and the concluding guidelines provided herein should enable new nanostructures to be accessed facilely.

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Section: Pvp In the Synthesis Of Metal Oxide Npsmentioning

confidence: 99%

Polyvinylpyrrolidone (PVP) in nanoparticle synthesis

et al. 2015

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“…It has been attracting more and more attention because of its widespread application in the synthesis of nanostructures. [11][12][13][14][15][16] It exhibits unusual colloidal and complexing properties, and has been extensively used in medicine and pharmaceuticals as a protective colloid, viscosity-enhancing agent, solubility promoter, granulating/tableting agent and film-forming or coating material. Recently, it has also been used for encapsulating DNA and protecting it from intracellular degradation.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and optical studies on polyvinylpyrrolidone thin films doped with rare earth metal salts

Basha

2010

Polym J

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A casting technique was used to prepare new nanocomposite thin films of pure and GdCl 3 -or HoCl 3 -doped polyvinylpyrrolidone (PVP). Transmission electron microscopy (TEM) was used to study the particle size and dispersibility in the investigated nanocomposites. Magnetic measurements, using a vibrating sample magnetometer (VSM), were carried out at room temperature and applied magnetic fields up to 10 kO e . The appearance of hysteresis loops with small values of saturation flux density (B s ), remanent flux density (B r ), squareness ratio (SQR) and coercive field (H c ), along with permeability (l) values relatively higher than 1, may be taken, as a matter of experimentation, to consider the investigated composites as soft magnet materials. In this study, PVP-HoCl 3 films showed slightly better magnetic properties compared with PVP-GdCl 3 films. A comparative analysis of infrared (IR) and ultraviolet-visible spectra of the parent components and their composites indicated the effective role of dopant nature and concentration in morphological and microstructural changes occurring in the PVP matrix. Optical constants, such as the energy gap (E g ) and the Urbach tail (E e ), were determined and discussed in terms of a model based on the electronic transition between localized states in the band structure.

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“…Nanotechnology and nanoparticles have created many opportunities for the advancement of various sciences due to their special physical and chemical properties. Magnetic nanoparticles (NPs) with biomedical applications such as magnetic resonance imaging (MRI), drug delivery, and catalytic activity have attracted great attention [1,2]. Among these groups, magnetic metals such as cobalt, nickel and iron and their oxides are biochemical materials that suffer from being quickly oxidised or structurally changed in oxygen and water.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Iron and Au-Fe3O4 Ferrite Nanoparticles for Biomedical Application

Salimi

Ehsani

Dezfuli

et al. 2021

J Supercond Nov Magn

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In the present study, Fe 3 O 4 (FO) nanoparticles and Au-Fe 3 O 4 (AFO) nanocomposite have been synthesised by using sedimentary method. The samples have been characterised by different techniques including X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), EDX, magnetisation vs applied field (M-H), AC magnetic susceptibility, vibrating sample magnetometer and photo-thermal activity. Structural study showed that both samples formed in spinel cubic structure with Fd-3 m space group and composite form was also observed in Au-Fe 3 O 4 . FTIR spectral analysis showed the spinel belonging two vibrational stretching modes and Au attached over the Fe 3 O 4 core. TEM images revealed the nano-metric morphology for both samples. The chemical composition of the samples was determined by EDX analysis. Magnetic results indicated that the samples have a superparamagnetic behavior, and a frequency dependence of AC susceptibility. Conclusively, this research has demonstrated that the samples are the most promising candidates in cancer therapy using hyperthermia. Superparamagnetic Au-Fe3O4 bifunctional nanocomposite have been detected in magnetic and hyperthermia activities.

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Synthesis and characterization of CoFe2O4–PVP nanocomposites

Cited by 13 publications

References 10 publications

Polyvinylpyrrolidone (PVP) in nanoparticle synthesis

Polyvinylpyrrolidone (PVP) in nanoparticle synthesis

Magnetic and optical studies on polyvinylpyrrolidone thin films doped with rare earth metal salts

Evaluation of Iron and Au-Fe3O4 Ferrite Nanoparticles for Biomedical Application

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