Magnetic properties of magnetite nanoparticles synthesized by forced hydrolysis

Compeán-Jasso, M.E.; Ruíz, Facundo; Martı́nez, J. R.; Herrera-Gómez, Alberto

doi:10.1016/j.matlet.2008.06.053

Cited by 81 publications

(39 citation statements)

References 18 publications

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“…One of the principal fact in the iron-containing nanoparticles is an existence of different configuration states of iron which determine their specific properties [7]. Magnetite nanocrystals have been of wide interest due to their potential applications as multi-ferroics [8], ultrahigh density magnetic storage media [9], ferro-fluids [10], in-vivo and in-vitro biomedical applications due to their biocompatibility [11,12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of magnetite nanocrystals

Raja

Verma

Karmakar

et al. 2011

Cryst. Res. Technol.

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Nanocrystals of magnetite (Fe 3 O 4 ) were prepared by sol-gel technique. The prepared nanocrystals were characterized for phase by powder X-ray diffraction (XRD) of the samples annealed at successively higher temperature. The magnetite phase was formed during the annealing of the synthesized powder at 400 °C for a few hours. The Fourier transform infrared spectroscopy (FTIR) was performed to analyze the functional groups in the material. The energy dispersive X-ray diffraction (EDAX) was performed for chemical composition analysis. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques were used to analyze the morphology of nanocrystals and for estimating their average size. The results confirm the formation of Fe 3 O 4 nanocrystals of the sizes ~20-50 nm.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of magnetite nanocrystals

Raja

Verma

Karmakar

et al. 2011

Cryst. Res. Technol.

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“…The control of the particle size in such colloids is of relevance because at the nanoscale, magnetite shows a magnetic behavior dependent on particle size distribution, as will be discussed later. Examples of methods for the synthesis of colloidal Fe 3 O 4 include ultrasound irradiation, controlled hydrolysis, sol–gel processes, hydrothermal treatment, thermal decomposition of molecular precursors, electrochemical synthesis and controlled precipitation . Aqueous methods for the preparation of Fe 3 O 4 are particularly interesting to obtain water compatible nanosorbents.…”

Section: Magnetic Nanosorbentsmentioning

confidence: 99%

Functionalized Inorganic Nanoparticles for Magnetic Separation and SERS Detection of Water Pollutants

et al. 2018

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Inorganic nanoparticles (NPs) have emerged in the last decades as key materials for a number of technologies. In particular, noble metal (Ag, Au) and iron oxide NPs have revealed important applications due to their plasmonic and magnetic properties, respectively. Among these applications, this review provides, on one hand, an overview on the use of colloidal metal NPs in surface enhanced Raman scattering (SERS) chemical analysis and, on the other hand, the application of iron oxides as a new class of nanosorbents for water pollutants. These distinct types of NPs are the main building blocks to produce [a] Raman spectroscopy is a powerful analytical tool for chemical characterization, providing information about molecular structure, surface processes, and interface reactions. [31,32] Raman spectroscopy is based on the inelastic scattering of photons by chemical species and materials (Raman scattering). Among the incident photons that hit the sample only a small portion is inelastically scattered, i.e. comes out at a different frequency from the incident light. The spectral information is based on the detection of these scattered photons that are recorded as energy shifts (Raman shifts) from the wavenumber of the elastic scattered photons (Rayleigh scattering). Each band in the Raman spectrum can be assigned to a vibrational mode (or Paula

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“…The authors showed that the magnetic properties of the obtained nanoparticles can be controlled by adjusting the molar ratio of ferrous (Fe 2 þ ) to ferric (Fe 3 þ ) ions as well as the particle size [10]. Compeán-Jasso et al [11] prepared superparamagnetic nanoparticles of iron oxide with diameters of approximately 15 nm by the forced hydrolysis method. The authors claimed that the magnetic properties are affected by the nanoparticles size.…”

Section: Introductionmentioning

confidence: 99%