Co-ferrite spinel and FeCo alloy core shell nanocomposites and mesoporous systems for multifunctional applications

Zhang, Kai; Amponsah, O.; Arslan, M.; Holloway, T.; Cao, Wei; Pradhan, Anindya

doi:10.1063/1.3676613

Cited by 9 publications

(8 citation statements)

References 10 publications

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“…With only a few exceptions (e.g., Zn 0.4 Fe 2.6 O 4 MNPs), alloyed MNPs such as FeCo generally exhibit higher Ms values (e.g., 150–200 emu/g) [102,103]. The enhancement has been attributed to the absence of the non-ferromagnetic “oxygen” component found in many of the alternative mixed-metal structures.…”

Section: Effect Of Different Parameters On Magnetic Propertiesmentioning

confidence: 99%

Tuning the Magnetic Properties of Nanoparticles

Kolhatkar

Jamison

Litvinov

et al. 2013

IJMS

698

418

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The tremendous interest in magnetic nanoparticles (MNPs) is reflected in published research that ranges from novel methods of synthesis of unique nanoparticle shapes and composite structures to a large number of MNP characterization techniques, and finally to their use in many biomedical and nanotechnology-based applications. The knowledge gained from this vast body of research can be made more useful if we organize the associated results to correlate key magnetic properties with the parameters that influence them. Tuning these properties of MNPs will allow us to tailor nanoparticles for specific applications, thus increasing their effectiveness. The complex magnetic behavior exhibited by MNPs is governed by many factors; these factors can either improve or adversely affect the desired magnetic properties. In this report, we have outlined a matrix of parameters that can be varied to tune the magnetic properties of nanoparticles. For practical utility, this review focuses on the effect of size, shape, composition, and shell-core structure on saturation magnetization, coercivity, blocking temperature, and relaxation time.

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Section: Effect Of Different Parameters On Magnetic Propertiesmentioning

confidence: 99%

Tuning the Magnetic Properties of Nanoparticles

Kolhatkar

Jamison

Litvinov

et al. 2013

IJMS

698

418

View full text Add to dashboard Cite

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“…FeCo MNPs usually exhibit high Ms values (122–230 emu/g) compared with Co MNPs (Chaubey et al 2007 ), due to the absence of the non-magnetic oxygen component (Zhang et al 2012 ). However, the ease of oxidation in the presence of air is the key issue for these alloys (Zhang et al 2012 ).…”

Section: Biomaterials For Magnetic Hyperthermiamentioning

confidence: 99%

Recent progress on magnetic nanoparticles for magnetic hyperthermia

2016

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Recent advances in nanomaterials science contributed to develop new micro- and nano-devices as potential diagnostic and therapeutic tools in the field of oncology. The synthesis of superparamagnetic nanoparticles (SPMNPs) has been intensively studied, and the use of these particles in magnetic hyperthermia therapy has demonstrated successes in treatment of cancer. However, some physical limitations have been found to impact the heating efficiency required to kill cancer cells. Moreover, the bio-safety of NPs remains largely unexplored. The primary goals of this review are to summarize the recent progress in the development of magnetic nanoparticles (MNPs) for hyperthermia, and discuss the limitations and advances in the synthesis of these particles. Based on this knowledge, new perspectives on development of new biocompatible and biofunctional nanomaterials for magnetic hyperthermia are discussed.

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“…The higher saturation magnetization reported in this study is attributed to the perfectly ordered single-domains magnetic NPs [3]. On the other hand, the lower coercivity is found due to the decrease of interparticle interactions and magneto-elastic anisotropy [22]. The retentivity of the magnetic nanomaterials is equal to M r = 13.5 emug − 1 as shown in Fig.…”

Section: Magnetic Propertiesmentioning

confidence: 52%

“…The NPs behaves as a soft ferrimagnet with coercivity, H c = 620 Oe and saturation magnetization, M s = 60 emug − 1 at room temperature. It is observed that the saturation magnetization of CoFe 2 O 4 is higher than the values obtained by modified wet chemical process and hydrothermal process [22,23]. The higher saturation magnetization reported in this study is attributed to the perfectly ordered single-domains magnetic NPs [3].…”

Section: Magnetic Propertiesmentioning

confidence: 63%

Structural, magnetic, and electrical properties of sol–gel derived cobalt ferrite nanoparticles

et al. 2018

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et al.. Structural, magnetic, and electrical properties of sol-gel derived cobalt ferrite nanoparticles. AbstractThis work reports the synthesis and studies of semi-soft ferrimagnetic CoFe 2 O 4 nanoparticles using sol-gel method. The X-ray diffraction patterns confirm the formation of cubic spinel CoFe 2 O 4 nanoparticles. The average crystallite size was found from XRD data is about 30 nm. The high resolution transmission electron microscopy analysis shows that nanoparticles are highly crystalline. The magnetic properties reveal that the particles are ferrimagnetically ordered soft magnetic materials with coercive field of 620 Oe and saturation magnetization M s = 60 emug − 1 . The higher value of saturation magnetization is due to the ordered single-domains magnetic nanoparticles and lower magnitude of coercivity is attributed to the decrease of interparticle interactions and magneto-elastic anisotropy. The value of remanence ratio R < 0.5 is responsible for magnetostatic interactions of the particles. The nanoparticles possess low values of dielectric constant which decreased with increasing frequency. The low dielectric constant makes the nanoparticles as a promising candidate for high frequency magnetic devices.

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Co-ferrite spinel and FeCo alloy core shell nanocomposites and mesoporous systems for multifunctional applications

Cited by 9 publications

References 10 publications

Tuning the Magnetic Properties of Nanoparticles

Tuning the Magnetic Properties of Nanoparticles

Recent progress on magnetic nanoparticles for magnetic hyperthermia

Structural, magnetic, and electrical properties of sol–gel derived cobalt ferrite nanoparticles

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