Facile large-scale synthesis of monodisperse Fe nanoparticles by modest-temperature decomposition of iron carbonyl

Hu, Yang; Ito, F.; Hasegawa, D.; Ogawa, Tomoyuki; Takahashi, M.

doi:10.1063/1.2711391

Cited by 28 publications

(14 citation statements)

References 12 publications

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“…Results of a modeling study of ethanol decomposition kinetics suggest that co-solvent decomposition creates a strong reducing atmosphere during spray pyrolysis via in situ production of hydrogen and carbon monoxide. Suggested reaction mechanisms are distinct for each precursor; in case of, for instance, Cu[CH 3 Recent achievements in this area are reported, in particular, in [184][185][186]. "Among others, we would like to mention obtaining iron nanoparticles from iron phthalocyanine [173] (although the pyrolysis of metal phthalocyanines can also lead to carbon nanotubes [187]), supported nanoPt/TiO 2 and nanoPd/TiO 2 by laser pyrolysis [188], carbon-encapsulated Fe nanoparticles (size between 5 and 20 nm) via a picric acid-detonation-induced pyrolysis of ferrocene, which is characterized by a self-heating and extremely fast process [189].…”

Section: Chemical Methodsmentioning

confidence: 99%

Synthetic Techniques and Applications of Activated Nanostructurized Metals: Highlights up to 2008

Kharissova

Kharisov²

2008

NANOTEC

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Main methods for current production of metallic nanoparticles in different forms are reviewed. Metal nanoparticles are generally synthesized in form of nanopowders, nanowires, nanoclusters, nanorods, nanobelts, and nanofilms. Bi- and trimetallic clusters and alloys are also of an interest. Examined techniques for obtaining metal nanoparticles include chemical vapor and electrochemical deposition, use of gamma-, X-ray, laser and UV-irradiation, ultrasonic and microwave treatment, electron- and ion-beams, arc discharge, decomposition and reduction of metal salts and complexes, and biosynthesis. A special attention is paid to Rieke and supported metals.

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Section: Chemical Methodsmentioning

confidence: 99%

Synthetic Techniques and Applications of Activated Nanostructurized Metals: Highlights up to 2008

Kharissova

Kharisov²

2008

NANOTEC

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“…The total amount of Fe O in particles with surfactants was determined by x-ray fluorescence using a Rigaku instrument. The Fe mass was firstly measured by our reported method [13] and the Fe O mass was then calculated via the stoichiometric ratio. Magnetic measurements were conducted using a Quantum Design superconducting quantum interference device (MPMS-5) with fields up to 5 T and temperatures from 5 to 300 K.…”

Section: Methodsmentioning

confidence: 99%

Facile Synthesis, Phase Transfer, and Magnetic Properties of Monodisperse Magnetite Nanocubes

Hasegawa

Takahashi

et al. 2008

IEEE Trans. Magn.

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The monodisperse Fe 3 O 4 nanocubes with controllable sizes from 6.5 to 30.0 nm have been synthesized in organic phase. By the formation of surfactant bilayers with charged hydrophilic ions of -cyclodextrin, Fe 3 O 4 nanocubes were successfully "pulled" into water from hexane for a possible biomedical application. The Fe 3 O 4 nanocubes with the surfactant bilayers show a good stability in aqueous solution compared with those in aqueous solution which were transferred from organic phase by ligand exchange using PVP with strong binding group. The hysteresis loop at 300 K of Fe 3 O 4 nanocubes with different sizes reveals that a size-dependent behavior of saturation magnetization and the nanocubes with a size less than 25 nm show a typical superparamagnetic behavior at room temperature. The comparison of magnetization of the hydrophilic Fe 3 O 4 nanocubes in CD and PVP aqueous solution reveals that the surfactant bilayers can provide a good stability of magnetization.

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“…Fe ナノ粒子(NPs)は他の磁性ナノ粒子と比べて高い飽和磁化(σ s )を有している 1,2) ．このため，Fe ナノ粒子の合成とその集合体に関する研究が盛んにおこなわれており，近年では高 σ s と高透磁率を両立した磁性ナノ粒子型の新規軟磁性材料や磁性誘電材料への応用に向けた研究がおこなわれている 3,4) ．Fe ナノ粒子の作製法として Fe(CO) 5 Fig.3 Reaction time-dependence of particle diameter.…”

Section: はじめにunclassified

Improve of Saturation Magnetization of Fe Nanoparticles by Additive Surfactant with Weak Adsorption Ability

Kamata¹,

Kura²,

Takahashi³

et al. 2012

J. Magn. Soc. Jpn.

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Magnetic nanoparticles (NPs) have attracted attention for their potential use electronic devices and nano-bioengineering applications. Fe NPs made from an Fe(CO) x-Oleylamine (OlAm) reacted precursor by thermal decomposition show high saturation magnetization (σ s) (~140 emu/g net at 300 K). However, the σ s never reaches the bulk value (218 emu/g at 300 K) of iron. This is due to the unique crystalline structure of the Fe NPs. Fe NPs covered with OlAm (OlAm-Fe NP) have an expanded α(b.c.c.) structure and ultra-fine grains. We improved the σ s of Fe NPs via phase control by adjusting the adsorption ability of a surfactant such as trioctylamine (TOcAm) or tribenzylamine (TBeAm). These surfactants have weaker adsorption ability than that of OlAm. Rietveld analysis revealed that the crystalline structure of Fe NPs covered with TOcAm or TBeAm was drastically changed into a rather α-Fe phase, in contrast to the expanded α phase observed for the OlAm-Fe NPs. TOcAm-Fe NPs had 10-80 vol.% of the α-Fe phase, and TBeAm-Fe NPs had 80-99 vol.% of the α-Fe phase, which indicates an α-Fe single phase. A σ s of 199 emu/g net for the TBeAm-Fe NPs was obtained at 300 K. This remarkable improvement is due to the increase volume fraction of the α-Fe phase. These results suggest that α-Fe phase formation using weak adsorption surfactant was highly effective for improving the σ s .

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Facile large-scale synthesis of monodisperse Fe nanoparticles by modest-temperature decomposition of iron carbonyl

Cited by 28 publications

References 12 publications

Synthetic Techniques and Applications of Activated Nanostructurized Metals: Highlights up to 2008

Synthetic Techniques and Applications of Activated Nanostructurized Metals: Highlights up to 2008

Facile Synthesis, Phase Transfer, and Magnetic Properties of Monodisperse Magnetite Nanocubes

Improve of Saturation Magnetization of Fe Nanoparticles by Additive Surfactant with Weak Adsorption Ability

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