Structural investigation of cobalt-doped silica derived from sol–gel synthesis

Vasconcelos, Daniela C.L.; Nunes, Eduardo H.M.; Houmard, Manuel; Motuzas, Julius; Nascimento, Jaílton Ferreira do; Grava, Wilson Mantovani; Ciminelli, V.S.T.; Costa, João C. Diniz da; Vasconcelos, Wander L.

doi:10.1016/j.jnoncrysol.2013.06.008

Cited by 7 publications

(2 citation statements)

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“…The mesoporosity increased significantly as a function of the Ni content as the average pore size increases whilst the BET surface area decreases for Ni/Si ratios from 25 to 50%. This effect has also been observed for cobalt oxide silica, and the increase in mesoporosity was attributed to the agglomeration of cobalt oxides [41]. Possibly, the same effect is also occurring for the increase in porosity as a function of the Ni/Si molar ratio in this work.…”

Section: Resultssupporting

confidence: 79%

Structural evolution of nickel oxide silica sol-gel for the preparation of interlayer-free membranes

Darmawan

Karlina

Astuti

et al. 2016

Journal of Non-Crystalline Solids

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Section: Resultssupporting

confidence: 79%

Structural evolution of nickel oxide silica sol-gel for the preparation of interlayer-free membranes

Darmawan

Karlina

Astuti

et al. 2016

Journal of Non-Crystalline Solids

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“…Fouad et al have synthesized cobalt oxide/SiO 2 thin films by means of spin coating technique . Cattaruzza et al and Daniela et al have reported the fabrication of cobalt doped silica nanocomposite by means of RF sputtering and sol–gel process, respectively . However, the understanding of magnetic properties of nanomagnets requires the synthesis of nanoparticles with large uniaxial magnetocrystalline anisotropy.…”

Section: Introductionmentioning

confidence: 99%

Growth of cobalt nanoparticles in Co–Al₂O₃ thin films deposited by RF sputtering

Goyal

Lamba

Annapoorni

2016

Physica Status Solidi (a)

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Cobalt nanoparticles in Co–Al2O3 films have been deposited by rf‐magnetron co‐sputtering of cobalt and alumina on Si <100> substrate. X‐ray diffraction (XRD) patterns were collected at room temperature for the as‐deposited as well as annealed thin films. The appearance of (002) reflection in XRD pattern indicates the presence of hcp‐Co nanoparticles with oriented growth along c‐axis. The scanning electron microscopy (SEM) result shows the formation of truncated hexagonal nanoparticles at elevated temperatures. Rutherford backscattering (RBS) has also been performed to estimate the film thickness. The effect of grain growth, after annealing at higher temperature, on surface roughness has also been studied using atomic force microscopy (AFM). Magnetic measurements carried out at room temperature both in parallel and perpendicular configuration reveal easy axis orientation along in‐plane direction. However, a large value of coercivity along c‐axis was attributed to the pinning due to the presence of oxide at grain boundaries. The pinning effect was also confirmed by the way of generating hysteresis using Monte Carlo simulation in a system of randomly distributed clusters of single domain interacting particles.

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Effect of metal ions and metal nanoparticles encapsulated in porous silica on biphenyl biodegradation by Rhodococcus erythropolis T902.1

Wannoussa

Hiligsmann

Tasseroul

et al. 2015

J Sol-Gel Sci Technol

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Structural investigation of cobalt-doped silica derived from sol–gel synthesis

Cited by 7 publications

References 32 publications

Structural evolution of nickel oxide silica sol-gel for the preparation of interlayer-free membranes

Structural evolution of nickel oxide silica sol-gel for the preparation of interlayer-free membranes

Growth of cobalt nanoparticles in Co–Al₂O₃ thin films deposited by RF sputtering

Effect of metal ions and metal nanoparticles encapsulated in porous silica on biphenyl biodegradation by Rhodococcus erythropolis T902.1

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Structural investigation of cobalt-doped silica derived from sol–gel synthesis

Cited by 7 publications

References 32 publications

Structural evolution of nickel oxide silica sol-gel for the preparation of interlayer-free membranes

Structural evolution of nickel oxide silica sol-gel for the preparation of interlayer-free membranes

Growth of cobalt nanoparticles in Co–Al2O3 thin films deposited by RF sputtering

Effect of metal ions and metal nanoparticles encapsulated in porous silica on biphenyl biodegradation by Rhodococcus erythropolis T902.1

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Growth of cobalt nanoparticles in Co–Al₂O₃ thin films deposited by RF sputtering