Morphological control of Fe3O4 particles via glycothermal process

Cho, Seung-Beom; Noh, Jun-Seok; Park, Sangjun; Lim, Dae-Young; Choi, Sang-Heul

doi:10.1007/s10853-006-0685-4

Cited by 33 publications

(23 citation statements)

References 30 publications

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“…The latter varies from 1 to 8 percent between the Fe0.1 sample and Fe0.8 sample. Wang et al [25] and Cho et al [26] have shown that the morphology of Fe 3 O 4 particles obtained via a solvothermal route can be controlled by the water content. In particular, the particle size increases when the amount of water increases.…”

Section: Structural Propertiesmentioning

confidence: 99%

Synthesis and characterization of magnetite powders obtained by the solvothermal method: Influence of the Fe3+ concentration

Jean

Nachbaur²,

Breton³

2012

Journal of Alloys and Compounds

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Section: Structural Propertiesmentioning

confidence: 99%

Synthesis and characterization of magnetite powders obtained by the solvothermal method: Influence of the Fe3+ concentration

Jean

Nachbaur²,

Breton³

2012

Journal of Alloys and Compounds

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“…Cho et al [42] studied the solvothermal synthesis of Fe 3 O 4 particles using EG in the presence of NaOH and dodecylamine and observed a strong effect of the EG/water ratio on the morphology. Hollow Fe 3 O 4 spheres were obtained in the absence of water; they consisted of oriented aggregates of Fe 3 O 4 nanoparticles.…”

Section: Effect Of Water On the Nanostructurementioning

confidence: 99%

Hierarchical structures of ZnO spherical particles synthesized solvothermally

Saito

Haneda

2011

Science and Technology of Advanced Materials

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We review the solvothermal synthesis, using a mixture of ethylene glycol (EG) and water as the solvent, of zinc oxide (ZnO) particles having spherical and flower-like shapes and hierarchical nanostructures. The preparation conditions of the ZnO particles and the microscopic characterization of the morphology are summarized. We found the following three effects of the ratio of EG to water on the formation of hierarchical structures: (i) EG restricts the growth of ZnO microcrystals, (ii) EG promotes the self-assembly of small crystallites into spheroidal particles and (iii) the high water content of EG results in hollow spheres.

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“…However, for the manganese–water system, manganese hydroxide is the stable phase over a much wider domain than Mn 2 O 3 and Mn 3 O 4 12 . Consequently, the growth of manganese oxides at low temperatures may be more difficult, although additional metal binding agents may be useful in modifying the stability range 15,16 …”

Section: Introductionmentioning

confidence: 99%

“…12 Consequently, the growth of manganese oxides at low temperatures may be more difficult, although additional metal binding agents may be useful in modifying the stability range. 15,16 In this work, manganese-rich nickel manganite films have been prepared by spin spray deposition at 901C and annealed in argon at 4001C. Scanning electron microscopy (SEM) was used to assess coverage and uniformity; X-ray diffraction (XRD) was used to detect crystallinity before and after annealing.…”

Section: Introductionmentioning

confidence: 99%

Spin Spray‐Deposited Nickel Manganite Thermistor Films For Microbolometer Applications

Podraza

et al. 2010

Journal of the American Ceramic Society

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Nickel manganite thin films are good candidates for thermal imaging applications because of their large temperature coefficient of resistance (TCR), (>−3%/K) and good environmental stability. To enable low‐temperature deposition (90°C) on preexisting circuitry, a spin spray technique was developed for these materials. As‐deposited manganese oxide films show well‐developed X‐ray diffraction patterns, while as‐deposited nickel manganite films exhibit a nanocrystalline spinel structure. Low‐temperature (400°C) postdeposition annealing leads to densification of the nanocrystalline nickel manganite spinel films. Spectroscopic ellipsometry measurements on annealed films provide complex dielectric function spectra over a range from 0.75 to 5.15 eV with comparable features with those found in films prepared by a chemical solution method. Energy‐dispersive X‐ray spectroscopy indicates that the final composition of the films is Ni deficient relative to the starting solution composition. The TCR of the nickel manganite films annealed at 400°C in an argon atmosphere is −3.6%/K. Doping the nickel manganite films with zinc results in an improvement of crystallinity, but leads to substantial increases in the electrical resistivity. Copper doping reduces the resistivity of the films to <1.0 kΩ·cm without degrading the crystalline quality, thus resulting in films suitable for microbolometer applications.

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Morphological control of Fe3O4 particles via glycothermal process

Cited by 33 publications

References 30 publications

Synthesis and characterization of magnetite powders obtained by the solvothermal method: Influence of the Fe3+ concentration

Synthesis and characterization of magnetite powders obtained by the solvothermal method: Influence of the Fe3+ concentration

Hierarchical structures of ZnO spherical particles synthesized solvothermally

Spin Spray‐Deposited Nickel Manganite Thermistor Films For Microbolometer Applications

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