Microwave response of coplanar waveguide based on electrodeposited CoFe2O4 nanowires

Labchir, Nabil; Hannour, A.; Hssi, A. Ait; Vincent, Didier; Chatelon, Jean-Pierre; Dufeu, D.; Ihlal, A.; Sajieddine, M.

doi:10.1016/j.jmmm.2020.166952

Cited by 10 publications

(3 citation statements)

References 27 publications

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“…We argue that this is primarily due to the loss of small gold-ferrite particles during additional washing and magnetic separation. The magnetic properties strongly depend on the fabrication procedure of the sample (annealing, preparation method, size and morphology of crystallites) [53]. The values of the magnetic parameters of CoFe 2 O 4 nanoparticles reported in the literature vary from Ms~15-20 [54,55] to 60-70 emu/g [52,56].…”

Section: [Auclmentioning

confidence: 99%

Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization

Сайкова

Pavlikov

Трофимова

et al. 2021

Metals

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During the past few decades, hybrid nanoparticles (HNPs) based on a magnetic material and gold have attracted interest for applications in catalysis, diagnostics and nanomedicine. In this paper, magnetic CoFe2O4/Au HNPs with an average particle size of 20 nm, decorated with 2 nm gold clusters, were prepared using methionine as a reducer and an anchor between CoFe2O4 and gold. The methionine was used to grow the Au clusters to a solid gold shell (up to 10 gold deposition cycles). The obtained nanoparticles (NPs) were studied by X-Ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transform infrared (FT-IR) spectroscopy, X-Ray photoelectron spectroscopy (XPS) and UV-vis spectroscopy techniques. The TEM images of the obtained HNPs showed that the surface of cobalt ferrite was covered with gold nanoclusters, the size of which slightly increased with an increase in the number of gold deposition cycles (from 2.12 ± 0.15 nm after 1 cycle to 2.46 ± 0.13 nm after 10 cycles). The density of the Au clusters on the cobalt ferrite surface insignificantly decreased during repeated stages of gold deposition: 21.4 ± 2.7 Au NPs/CoFe2O4 NP after 1 cycle, 19.0 ± 1.2 after 6 cycles and 18.0 ± 1.4 after 10 cycles. The magnetic measurements showed that the obtained HNPs possessed typical ferrimagnetic behavior, which corresponds to that of CoFe2O4 nanoparticles. The toxicity evaluation of the synthesized HNPs on Chlorella vulgaris indicated that they can be applied to biomedical applications such as magnetic hyperthermia, photothermal therapy, drug delivery, bioimaging and biosensing.

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Section: [Auclmentioning

confidence: 99%

Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization

Сайкова

Pavlikov

Трофимова

et al. 2021

Metals

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show abstract

“…The magnetic properties strongly depend on the prehistory of the sample (annealing, preparation method, size and morphology of crystallites) [47]. The values of the magnetic parameters of CoFe2O4 nanoparticles reported in the literature vary from Ms ~15-20 [48,49] to 60-70 emu/g [46,50].…”

Section: Samplementioning

confidence: 99%

Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization

Сайкова¹,

Pavlikov²,

Трофимова³

et al. 2021

Preprint

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During the past few decades, hybrid nanoparticles (HNPs) based on a magnetic material and gold have attracted interest for applications in catalysis, diagnostics and nanomedicine. In this paper, magnetic CoFe2O4/Au HNPs with an average particle size of 10–20 nm decorated with 2-nm gold clusters were prepared using methionine as a reducer and an anchor between CoFe2O4 and gold. The obtained nanoparticles were studied by X-Ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transform infrared (FT-IR) spectroscopy and X-Ray photoelectron spectroscopy (XPS) and UV-Vis spectroscopy techniques. The TEM images of the HNPs obtained after one, six and ten gold deposition cycles showed that the surface of cobalt ferrite was covered with gold nanoclusters, which slightly increased with an increase in the number of gold deposition cycles (from 2.12 ± 0.15 nm after one cycle to 2.46 ± 0.13 nm after ten cycles) without any change in surface density. The magnetic measurements showed that the obtained HNPs possessed typical ferrimagnetic behaviour, which corresponds to that of CoFe2O4 nanoparticles. The toxicity evaluation of the synthesised HNPs on Chlorella vulgaris indicated that they can be applied to biomedical applications such as magnetic hyperthermia, photothermal therapy, drug delivery, bioimaging and biosensing.

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“…Cobalt ferrite (CoFe2O4) is a ferrimagnetic material widely recognized and employed in many applications due to its high coercivity, high saturation magnetization and strong magnetic anisotropy. CoFe2O4 nanowires are widely used for magnetoresistive sensors, magnetic random access memories, microwave devices [2,3]. For this reason, in the past, several papers dealing with the structure and magnetic properties of CoFe2O4 nanowires, elaborated by different methods, have been published [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Controlled electrochemical growth and magnetic properties of CoFe2O4 nanowires with high internal magnetic field

Labchir

Hannour

Hssi

et al. 2021

Journal of Alloys and Compounds

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Microwave response of coplanar waveguide based on electrodeposited CoFe2O4 nanowires

Cited by 10 publications

References 27 publications

Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization

Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization

Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization

Controlled electrochemical growth and magnetic properties of CoFe2O4 nanowires with high internal magnetic field

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