Room temperature ferromagnetism in combustion reaction prepared iron-doped zinc oxide nanoparticles

Franco, A.; Alves, Thiago Eduardo Pereira

doi:10.1016/j.mssp.2013.07.008

Cited by 20 publications

(6 citation statements)

References 15 publications

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“…Note that the magnetization of our samples is 10 times more than magnetization of samples ZnO-Fe with close concentration of dopant (≤1%) received with use of traditional ceramic synthesis ( Fe of = 1%, = 1,25 * 10 −2 emu/g, [42]), .00 5.00 3.00 4.00 7.00 9.00 1.00 8.00 2.00 10.00 0.00 method sol-gel [28]) that obviously points to a defining role of structural defects on strengthening of ferromagnetic response and preference of use of strongly nonequilibrium methods for formation of structural defects in various materials, before methods of wet chemistry.…”

Section: Magnetic Properties and Phase Transformations Of Npsmentioning

confidence: 84%

“…The analysis of literature showed that irrespective of a method for obtaining nanoparticles and a type of the nanostructured material (thin films, nanopowders, nanostructures with various morphologies, nanorods, nanowires, nanodisks, nanotetrapods, etc.) in ZnO-Fe system general regularities are observed: with the growth of Fe dopant concentration the size of nanoparticles, crystallinity, and width of the bandgap zone decrease [28,32,33,40,43,44]; when annealing samples with concentration of Fe dopant from 2-5 mass.% and above, with the growth of annealing temperature the formation of the secondary phase-spinel ZnFe 2 O 4 dominates [23,27,42,43,45,46]. The formation of other secondary phases, Fe 3 O 4 [47] and -Fe [48], was observed.…”

Section: Introductionmentioning

confidence: 95%

“…For the synthesis of nanoparticles ZnO-Fe a spherical crushing (ball milling) [25,26] was used along with the sol-gel method [27][28][29][30][31], codeposition [32][33][34][35], pulsed laser deposition [36], burning of solutions [37], microwave synthesis [38], flame spray pyrolysis [39,40], chemical pyrophoric reaction method [41], the method of autocombustion [42], and so forth.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Fe-Doping on the Structural and Magnetic Properties of ZnO Nanopowders, Produced by the Method of Pulsed Electron Beam Evaporation

Il’ves

Sokovnin

Мурзакаев

2016

Journal of Nanotechnology

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The nanopowders (NPs) ZnO-Zn-Fe and ZnO-Fe with the various concentrations of Fe (xFe) (0≤xFe≤0.619mass.%) were prepared by the pulsed electron beam evaporation method. The influence of doping Fe on structural and magnetic properties of NPs was investigated. X-ray diffraction showed that powders contain fine-crystalline and coarse-crystalline ZnO fractions with wurtzite structure and an amorphous component. Secondary phases were not found. The magnetic measurements made at room temperature, using the vibration magnetometer and Faraday’s scales, showed ferromagnetic behavior for all powders. Magnetization growth of NPs ZnO-Zn and ZnO-Zn-Fe was detected after their short-term annealing on air at temperatures of 300–500°C. The growth of magnetization is connected with the increase in the concentration of the phase ZnO with a defective structure as the result of oxidation nanoparticles (NPles) of Zn. The scanning transmission electron microscopy (STEM) showed a lack of Fe clusters and uniform distribution of atoms dopant in the initial powder ZnO-Zn-Fe. A lack of logical correlation between magnetization and concentration of a magnetic dopant of Fe in powders is shown.

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Section: Magnetic Properties and Phase Transformations Of Npsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Influence of Fe-Doping on the Structural and Magnetic Properties of ZnO Nanopowders, Produced by the Method of Pulsed Electron Beam Evaporation

Il’ves

Sokovnin

Мурзакаев

2016

Journal of Nanotechnology

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“…The solution combustion method was also proposed to synthesize iron-doped zinc oxide nanoparticles in a faster way than sol-gel methods [ 202 ]. Zinc nitrate, iron nitrate and urea were used as precursors and fuel, respectively.…”

Section: Synthesis Methods and Characterizationmentioning

confidence: 99%

Doped Zinc Oxide Nanoparticles: Synthesis, Characterization and Potential Use in Nanomedicine

et al. 2020

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Smart nanoparticles for medical applications have gathered considerable attention due to an improved biocompatibility and multifunctional properties useful in several applications, including advanced drug delivery systems, nanotheranostics and in vivo imaging. Among nanomaterials, zinc oxide nanoparticles (ZnO NPs) were deeply investigated due to their peculiar physical and chemical properties. The large surface to volume ratio, coupled with a reduced size, antimicrobial activity, photocatalytic and semiconducting properties, allowed the use of ZnO NPs as anticancer drugs in new generation physical therapies, nanoantibiotics and osteoinductive agents for bone tissue regeneration. However, ZnO NPs also show a limited stability in biological environments and unpredictable cytotoxic effects thereof. To overcome the abovementioned limitations and further extend the use of ZnO NPs in nanomedicine, doping seems to represent a promising solution. This review covers the main achievements in the use of doped ZnO NPs for nanomedicine applications. Sol-gel, as well as hydrothermal and combustion methods are largely employed to prepare ZnO NPs doped with rare earth and transition metal elements. For both dopant typologies, biomedical applications were demonstrated, such as enhanced antimicrobial activities and contrast imaging properties, along with an improved biocompatibility and stability of the colloidal ZnO NPs in biological media. The obtained results confirm that the doping of ZnO NPs represents a valuable tool to improve the corresponding biomedical properties with respect to the undoped counterpart, and also suggest that a new application of ZnO NPs in nanomedicine can be envisioned.

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“…In addition room temperature ferromagnetism with high Curie temperature has been observed in ZnO compounds doped with appropriate transition metals (Fe, Co, Mn, etc.) [17,19,18] and rare earth ions [20,21].…”

Section: Introductionmentioning

confidence: 99%

Enhanced dielectric constant of Co-doped ZnO nanoparticulate powders

Franco

Pessoni

2015

Physica B: Condensed Matter

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Room temperature ferromagnetism in combustion reaction prepared iron-doped zinc oxide nanoparticles

Cited by 20 publications

References 15 publications

Influence of Fe-Doping on the Structural and Magnetic Properties of ZnO Nanopowders, Produced by the Method of Pulsed Electron Beam Evaporation

Influence of Fe-Doping on the Structural and Magnetic Properties of ZnO Nanopowders, Produced by the Method of Pulsed Electron Beam Evaporation

Doped Zinc Oxide Nanoparticles: Synthesis, Characterization and Potential Use in Nanomedicine

Enhanced dielectric constant of Co-doped ZnO nanoparticulate powders

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