Size controlled Fe nanoparticles through polyol process and their magnetic properties

Joseyphus, R. Justin; Shinoda, Kōzō; Kodama, Daisuke; Jeyadevan, Balachandran

doi:10.1016/j.matchemphys.2010.05.001

Cited by 107 publications

(72 citation statements)

References 33 publications

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“…This resistance to oxidation may be due to formation of a thin passive oxide layer around the particles, which was not only observed from the EDS analysis in Fig. 2 on the presence of nearly 2-3% of oxygen [7], but was also evident by its appearance in the TEM image of Fig. 3(e).…”

Section: Morphology Characterizationmentioning

confidence: 73%

“…Particularly, magnetic nanoparticles used in hyperthermia and targeted drug delivery require high saturations magnetizations for their easy manipulation through magnetic field assistance. Similarly, magnetic labels for biosensor applications should possess high magnetic moments for efficient translocation of the functionalized labels to the specific sites on the sensor surface [6,7]. Thus, the quest for identifying suitable materials for the said purpose points towards the most feasible body centered cubic (bcc) FeCo magnetic nanoparticles due to their high saturation magnetization (Ms¼240 emu/g), high Curie temperature and permeability properties [8,9].…”

Section: Introductionmentioning

confidence: 99%

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One-pot synthesis of high magnetization air-stable FeCo nanoparticles by modified polyol method

et al. 2013

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Section: Morphology Characterizationmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

One-pot synthesis of high magnetization air-stable FeCo nanoparticles by modified polyol method

et al. 2013

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“…The peak positions 2h = 61°(at the 532-nm wavelength) and 73.1°a re attributed to the FeO phases (220), and (311), respectively [28,29]. In addition, the peaks at 2h = 44.67°, 65°a nd 82.33°are indicative of the Fe phases (110), (200) and (211), respectively [30]. The diffraction peaks at planes (111), (220), (311), (400), (422), (511) and (440) are the characteristic peaks of Fe 3 O 4 crystals with a cubic spinel structure and corresponded to a cubic unit cell [26,31], or the inverse-spinel structure (Fe 3 O 4 ) [32].…”

Section: Ag-tio 2 Compound Nanoparticlesmentioning

confidence: 93%

Comparison of characteristics of selected metallic and metal oxide nanoparticles produced by picosecond laser ablation at 532 and 1064 nm wavelengths

Hamad

2016

Appl. Phys. A

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Picosecond laser generation of nanoparticles was only recently reported. The effect of laser wavelength in picosecond laser generation of nanoparticles is not yet fully understood. This investigation reports the new findings comparing the characteristics of Au, Ag, Ag-TiO 2 , TiO 2 , ZnO and iron oxide nanoparticles generated by picosecond laser ablation in deionised water at 532 and 1064 nm laser wavelengths. The laser ablation was carried out at a fixed pulse width of 10 ps, a repetition rate of 400 kHz and a scan speed of 250 mm/s. The nanoparticles were characterised by UV-Vis optical spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The work shows that there is no noticeable difference in the size of the metal oxide nanoparticles produced at 532 and 1064 nm, especially for the TiO 2 and ZnO nanoparticles; however, a considerable size difference can be seen for metallic (e.g. Au) and metallic compound (e.g. Ag-TiO 2 ) nanoparticles at the two wavelengths. It demonstrates that noble metals are more profoundly affected by laser wavelengths. The reasons behind these results are discussed. In addition, the work shows that there are different crystalline structures of the TiO 2 nanoparticles at 1064 and 532 nm wavelengths.

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“…A lot of research has been conducted in the past to synthesize and characterize FeCo nanoparticles and their composites [22,[26][27][28][29][30] over standard carbon-coated copper grids and allowed to dry for analysis. Energy Dispersive X-ray Spectroscopy (EDX) elemental analysis was determined from an EDAX system coupled to the Tecnai G2 TEM machine.…”

Section: Introductionmentioning

confidence: 99%

Electrokinetic and Impedimetric Dynamics of FeCo-Nanoparticles on Glassy Carbon Electrode

Ikpo

Njomo

Ozoemena³

et al. 2013

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Abstract. The electrochemical dynamics of a film of FeCo nanoparticles were studied on a glassy carbon electrode (GCE). The film was found to be electroactive in 1 M LiClO 4 containing 1:1 v/v ethylene carbonate -dimethyl carbonate electrolyte system. Cyclic voltammetric experiments revealed a diffusion-controlled electron transfer process on the GCE/FeCo electrode surface. Further interrogation on the electrochemical properties of the FeCo nanoelectrode in an oxygen saturated 1 M LiClO 4 containing 1:1 v/v ethylene-carbonate-dimethyl carbonate revealed that the nanoelectrode showed good response towards the electro-catalytic reduction of molecular oxygen with a Tafel slope of about 120 mV which is close to the theoretical 118 mV for a single electron transfer process in the rate limiting step; and a transfer coefficient (α) of 0.49. The heterogeneous rate constant of

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Size controlled Fe nanoparticles through polyol process and their magnetic properties

Cited by 107 publications

References 33 publications

One-pot synthesis of high magnetization air-stable FeCo nanoparticles by modified polyol method

One-pot synthesis of high magnetization air-stable FeCo nanoparticles by modified polyol method

Comparison of characteristics of selected metallic and metal oxide nanoparticles produced by picosecond laser ablation at 532 and 1064 nm wavelengths

Electrokinetic and Impedimetric Dynamics of FeCo-Nanoparticles on Glassy Carbon Electrode

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