On the production of dispersive single-crystal iron carbide (Fe3C) nanoparticulate

Жигач, А. Н.; Leipunsky, I. O.; Кусков, М. Л.; Berezkina, N. G.; Афанасенкова, Е. С.; Lopez, Guido; Скрылева, Е. А.; Menushenkov, V. P.; Жигалина, О. М.; Хмеленин, Д. Н.

doi:10.1007/s12034-021-02623-y

Cited by 7 publications

(5 citation statements)

References 38 publications

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“…Carbon-coated iron nanoparticles (Fe@C) were synthesized by evaporation-condensation flow-levitation method from iron wire using argon as a carrier gas and acetylene as a carbon source. A more detailed procedure is described elsewhere [40]. Briefly, iron seeds are nucleated from supersaturated iron vapor after preheating iron source (iron wire) in a high-frequency electromagnetic field (440 kHz).…”

Section: Methodsmentioning

confidence: 99%

“…Further, formed iron nanoparticles catalyze decomposition of acetylene injected into argon flow below in the flow. As-synthesized Fe@C nanoparticles were collected on a filter and subjected to passivation by atmospheric air using two cycles "slow inflow followed by pumping out" [40].…”

Section: Methodsmentioning

confidence: 99%

“…The saturation magnetization value of the samples produced is Ms = 83.6 emu/g with a coercive force of Hc = 623 Oe. The Fe@C magnetization value is smaller in comparison to the bulk α-Fe phase [45] and might be associated with several factors which undermine the role of the external magnetic field presence of diamagnetic contribution of carbon shell, ferromagnetic Fe 3 C, and paramagnetic γ-Fe phases, and amorphous phases with a lower saturation magnetization or paramagnetic phase based on FeC x [40]. The percentage of superparamagnetic fraction in the sample is around 30% according to the calculated values of coercivity for the core-shell iron nanoparticles with a mean diameter of 20 nm [50].…”

Section: Mht Performancementioning

confidence: 99%

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Albumin Stabilized Fe@C Core–Shell Nanoparticles as Candidates for Magnetic Hyperthermia Therapy

et al. 2022

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Carbon-encapsulated iron nanoparticles (Fe@C) with a mean diameter of 15 nm have been synthesized using evaporation–condensation flow–levitation method by the direct iron-carbon gas-phase reaction at high temperatures. Further, Fe@C were stabilized with bovine serum albumin (BSA) coating, and their electromagnetic properties were evaluated to test their performance in magnetic hyperthermia therapy (MHT) through a specific absorption rate (SAR). Heat generation was observed at different Fe@C concentrations (1, 2.5, and 5 mg/mL) when applied 331 kHz and 60 kA/m of an alternating magnetic field, resulting in SAR values of 437.64, 129.36, and 50.4 W/g for each concentration, respectively. Having such high SAR values at low concentrations, obtained material is ideal for use in MHT.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Mht Performancementioning

confidence: 99%

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Albumin Stabilized Fe@C Core–Shell Nanoparticles as Candidates for Magnetic Hyperthermia Therapy

et al. 2022

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“…Organoiron compound ferrocene, (C 5 H 5 ) 2 Fe, has been used profusely either as a precursor or catalyst for synthesis of various iron-based nanostructures. −, ,− Ferrocene, solid at room temperature with mp at ∼450 K and bp at ∼522 K, undergoes complete sublimation . Above ∼773 K, ferrocene vapor decomposes to metallic iron along with several gaseous products (e.g., CH 4 , H 2 ) .…”

Section: Introductionmentioning

confidence: 99%

“…Notably, bare oxalic acid dihydrate decomposes completely when heated over 373 K . Conversely, ferrocene also plays a vital role in preparing Fe 3 C nanostructures. − …”

Section: Introductionmentioning

confidence: 99%

Reaction Atmosphere-Controlled Thermal Conversion of Ferrocene to Hematite and Cementite Nanomaterials─Structural and Spectroscopic Investigations

Kundu,

Sarkar,

Ghorai

et al. 2024

ACS Omega

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Recently, we have reported the influence of various reaction atmospheres on the solid-state reaction kinetics of ferrocene, where oxalic acid dihydrate was used as a coprecursor. In this light, present study discusses on the nature of decomposed materials of the solid-state reactions of ferrocene in O 2 , air, and N 2 atmospheres. The ambient and oxidative atmospheres caused the decomposition to yield pure hematite nanomaterials, whereas cementite nanomaterials along with α-Fe were obtained in N 2 atmosphere. The obtained materials were mostly agglomerated. Elemental composition of each material was estimated. Using the absorbance data, the energy band gap values were estimated and the related electronic transitions from the observed absorption spectra were explored. Urbach energy was calculated for hematite, which described the role of defects in the decomposed materials. The nanostructures exhibited photoluminescence due to selftrapped states linked to their optical characteristics. Raman spectroscopy of hematite detected seven Raman modes, confirming the rhombohedral structure, whereas the D and G bands were visible in the Raman spectra for cementite. Thus, the reaction atmosphere significantly influenced the thermal decomposition of ferrocene and controls the type of nanomaterials obtained. Plausible reactions of the undergoing solid-state decomposition have been proposed.

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Preparation of CNT/diamond composite via MPCVD: The interface behavior

Feng,

Yuan,

Chen

et al. 2024

Diamond and Related Materials

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On the production of dispersive single-crystal iron carbide (Fe3C) nanoparticulate

Cited by 7 publications

References 38 publications

Albumin Stabilized Fe@C Core–Shell Nanoparticles as Candidates for Magnetic Hyperthermia Therapy

Albumin Stabilized Fe@C Core–Shell Nanoparticles as Candidates for Magnetic Hyperthermia Therapy

Reaction Atmosphere-Controlled Thermal Conversion of Ferrocene to Hematite and Cementite Nanomaterials─Structural and Spectroscopic Investigations

Preparation of CNT/diamond composite via MPCVD: The interface behavior

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