Synthesis of Air Stable FeCo/C Alloy Nanoparticles by Decomposing a Mixture of the Corresponding Metal-Acetyl Acetonates under Their Autogenic Pressure

Holodelshikov, Elena; Perelshtein, Ilana; Gedanken, Aharon

doi:10.1021/ic101825e

Cited by 21 publications

(18 citation statements)

References 19 publications

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“…Magnetic nanoparticles are a topic of growing interest because of their versatile applications such as ultrahigh density data storage, drug delivery, magnetic separation and MRI contrast enhancement [1][2][3][4][5][6][7][8][9][10][11][12][13]. Among those, magnetic hyperthermia is a novel therapeutic method in which the magnetic nanoparticles are subjected to an alternating magnetic field to generate a specific amount of heat.…”

Section: Introductionmentioning

confidence: 99%

“…FeCo alloy has the highest saturation magnetization among all binary magnetic alloys [1]. Several methods have been used to synthesize FeCo alloy nanoparticles which include arc discharge [2], polyol [3][4][5][6][7], hydrothermal [8], reaction under autogenic pressure at elevated temperature (RAPET) [9], thermal decomposition [10], wet chemical [11,12], and coprecipitation [13,17,18]. The morphology and size distribution of as-synthesized nanoparticles are not well controlled in most of these processes.…”

Section: Introductionmentioning

confidence: 99%

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Size Controlled Synthesis of FeCo Alloy Nanoparticles and Study of the Particle Size and Distribution Effects on Magnetic Properties

Shokuhfar

Afghahi

2014

Advances in Materials Science and Engineering

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In this research the size controlled synthesis of FeCo nanoparticles was done using a quaternary microemulsion system. X-ray diffraction and high resolution transmission electron microscopy of as-synthesized nanoparticles confirm the formation of FeCo alloy nanoparticles. The effects of two process parameters, namely, water to surfactant molar ratio and molar concentration of metal salts, on the size and size distribution of nanoparticles were discussed by the aid of transmission electron microscopy. The size dependency of magnetic properties was also investigated using a room temperature vibrating sample magnetometer. The superparamagnetic-ferromagnetic and single domain-multidomain transition sizes were determined. Then the specific absorption rates at transition sizes were calculated and the best sample for magnetic hyperthermia treatment was introduced.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Size Controlled Synthesis of FeCo Alloy Nanoparticles and Study of the Particle Size and Distribution Effects on Magnetic Properties

Shokuhfar

Afghahi

2014

Advances in Materials Science and Engineering

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“…Till now, several methods have been used to synthesize FeCo alloy nanoparticles which include arc discharge [21], polyol [2], hydrothermal process [6], RAPET [7], thermal decomposition [9], wet chemical methods [10,11], and co-precipitation [13]. The morphology and size distribution of as-synthesized nanoparticles are not well controlled in most of these processes.…”

Section: Introductionmentioning

confidence: 99%

The heating effect of iron-cobalt magnetic nanofluids in an alternating magnetic field: application in magnetic hyperthermia treatment

Shokuhfar

Afghahi

2013

Nanoscale Res Lett

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In this research, FeCo alloy magnetic nanofluids were prepared by reducing iron(III) chloride hexahydrate and cobalt(II) sulfate heptahydrate with sodium borohydride in a water/CTAB/hexanol reverse micelle system for application in magnetic hyperthermia treatment. X-ray diffraction, electron microscopy, selected area electron diffraction, and energy-dispersive analysis indicate the formation of bcc-structured iron-cobalt alloy. Magnetic property assessment of nanoparticles reveals that some samples are single-domain superparamagnetic, while others are single- or multi-domain ferromagnetic. The stability of the magnetic fluids was achieved by using a CTAB/1-butanol surfactant bilayer. Results of Gouy magnetic susceptibility balance experiments indicate good stability of FeCo nanoparticles even after dilution. The inductive properties of corresponding magnetic fluids including temperature rise and specific absorption rate were determined. Results show that with increasing of the nanoparticle size in the single-domain size regime, the generated heat increases, indicating the significant effect of the hysteresis loss. Finally, the central parameter controlling the specific absorption rate of nanoparticles was introduced, the experimental results were compared with those of the Stoner-Wohlfarth model and linear response theory, and the best sample for magnetic hyperthermia treatment was specified.

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“…The present work demonstrates the use of metal@carbon and bimetal@carbon core–shell nanoparticles for the formation of stable conductive ink for inkjet printing. Samples of Ag@C, Cu@C, Ag@Cu@C and Cu@Ag@C were fabricated by a rapid, one‐step, straightforward, solvent‐, surfactant‐ and catalyst‐free technique called RAPET (reaction under autogenic pressure at elevated temperatures) 23, 63–70. RAPET has already been shown to be an excellent method for the fabrication of spherical core‐shell structures.…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Characterization, and Printing of Conductive Ink Based on Multi Core–Shell Nanoparticles Synthesized by RAPET

Butovsky

Perelshtein

Nissan

et al. 2013

Adv Funct Materials

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In the current research, conductive patterns are deposited on different substrates by direct inkjet printing of conductive inks based on metal@carbon and bimetal@carbon core–shell nanoparticles synthesized by the RAPET (reaction under autogenic pressure at elevated temperatures) technique. Various co‐solvents and additives are examined for production of stable conductive ink. The morphology of the deposited layers is characterized by optical and scanning electron microscopy measurements. The stability of the prepared inks is examined by dynamic light scattering measurements. The electrical resistivity is measured by a four‐point probe system and calculated using the geometric dimensions. The results obtained are very promising and indicate that the conductivity of the deposited layers is close to that of bulk metals and higher than most results published so far. Moreover, the importance and advantages of the protective carbon layer that prevents metal oxidation is demonstrated.

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Synthesis of Air Stable FeCo/C Alloy Nanoparticles by Decomposing a Mixture of the Corresponding Metal-Acetyl Acetonates under Their Autogenic Pressure

Cited by 21 publications

References 19 publications

Size Controlled Synthesis of FeCo Alloy Nanoparticles and Study of the Particle Size and Distribution Effects on Magnetic Properties

Size Controlled Synthesis of FeCo Alloy Nanoparticles and Study of the Particle Size and Distribution Effects on Magnetic Properties

The heating effect of iron-cobalt magnetic nanofluids in an alternating magnetic field: application in magnetic hyperthermia treatment

Fabrication, Characterization, and Printing of Conductive Ink Based on Multi Core–Shell Nanoparticles Synthesized by RAPET

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