Size-dependent electromagnetic properties and the related simulations of Fe3O4 nanoparticles made by microwave-assisted thermal decomposition

Liang, Yuan; Fan, Fu‐Ren F.; Ma, Ming; Sun, Jianfei; Chen, Jun; Zhang, Yu; Gu, Ning

doi:10.1016/j.colsurfa.2017.06.059

Cited by 28 publications

(25 citation statements)

References 51 publications

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“…As shown in Figure 1, all the nanoparticles of four different sizes were successfully modified without apparent agglomeration, where a thin layer of DSPE-PEG2000 was visible. The DLS data showed that the hydrodynamic diameters of the as-synthesized MION with different TEM sizes (14,18,22, and 26 nm) were 24, 28, 33, and 38 nm, respectively (Figure 2(a)). What is more, Fe 3 O 4 @PEG of the four sizes all exhibited excellent stability in aqueous Journal of Nanomaterials solution during a long period of time about 5 months (Figure 2(b)).…”

Section: Discussionmentioning

confidence: 99%

“…The saturation magnetization (M s ) of Fe 3 O 4 @PEG increased with size, and the hysteresis loop exhibited superparamagnetic behavior (Figure 2(c)). The M s of the four sizes (14,18,22, and 26 nm) was 78, 88, 92, and 97 emu g −1 Fe at room temperature (300 K), respectively. It was worth mentioning that the M s tended to have impact on magnetic heating and MRI contrast effect of MION [25][26][27].…”

Section: Discussionmentioning

confidence: 99%

“…Previous reports showed that magnetic properties of iron oxide nanoparticles such as saturation magnetization (M s ), specific absorption rate (SAR), and relaxivity (r 2 ) have a close relationship with their sizes among a large size range from a few nanometers to hundreds of nanometers [2,[13][14][15][16][17]. Tong et al [16] reported that the M s of MION increased slightly with size from 6 to 40 nm, and the SAR values increased monotonically with size enlarged (325 kHz, 20.7 kA/m), while SAR was really low for MION below 11 nm.…”

Section: Introductionmentioning

confidence: 99%

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Precise Study on Size-Dependent Properties of Magnetic Iron Oxide Nanoparticles for In Vivo Magnetic Resonance Imaging

Chen

Xie

et al. 2018

Journal of Nanomaterials

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Developing a biocompatible contrast agent with high stability and favorable magnetism for sensitive detection of malignant tumors using magnetic resonance imaging (MRI) remains a great demand in clinical. Nowadays, the fine control of magnetic iron oxide nanoparticle (MION) sizes from a few nanometers to dozens of nanometers can be realized through a thermal decomposition method of iron precursors. This progress allows us to research accurately on the size dependence of magnetic properties of MION, involving saturation magnetization (M s ), specific absorption rate (SAR), and relaxivity. Here, we synthesized MION in a size range between 14 and 26 nm and modified them with DSPE-PEG2000 for biomedical use. The magnetic properties of PEGylated MION increased monotonically with MION size, while the nonspecific uptake of MION also enhanced with size through cell experiments. The MION with the size of 22 nm as a T2-weighted contrast agent presented the best contrastenhancing effect comparing with other sizes in vivo MRI of murine tumor. Therefore, the MION of 22 nm may have potential to serve as an ideal MRI contrast agent for tumor detection.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Precise Study on Size-Dependent Properties of Magnetic Iron Oxide Nanoparticles for In Vivo Magnetic Resonance Imaging

Chen

Xie

et al. 2018

Journal of Nanomaterials

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“…Fe 3 O 4 , being the most widely studied photocatalyst among the ferrite nanoparticles, displays exceptional superparamagnetic behavior, which provides an additional benefit of a much easier magnetic separation of the semiconductor and the solution. The preparation of Fe 3 O 4 nanoparticles is commonly done by coprecipitation method [13,31,63,79] or thermal decomposition method [95][96][97][98], with slight variations such as the room temperature coprecipitation by Mascolo and sonochemical preparation by Solomon [13,26,99]. Moreover, different variations in the morphologies of ferritic nanoparticles are shown in figures 6(a) and (b), which show the SEM images of hollow Fe 2 O 3 nanoparticles [100] and a complex core-shell nanocomposite of Fe 3 O 4 @ SiO 2 @ Poly (ethyleneimine)-Au/Ag @ Polydopamine [101].…”

Section: Nanocomposites and Heterojunctionsmentioning

confidence: 99%

Heterogeneous photocatalysis and its potential applications in water and wastewater treatment: a review

2018

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There has been a considerable amount of research in the development of sustainable water treatment techniques capable of improving the quality of water. Unavailability of drinkable water is a crucial issue especially in regions where conventional drinking water treatment systems fail to eradicate aquatic pathogens, toxic metal ions and industrial waste. The research and development in this area have given rise to a new class of processes called advanced oxidation processes, particularly in the form of heterogeneous photocatalysis, which converts photon energy into chemical energy. Advances in nanotechnology have improved the ability to develop and specifically tailor the properties of photocatalytic materials used in this area. This paper discusses many of those photocatalytic nanomaterials, both metal-based and metal-free, which have been studied for water and waste water purification and treatment in recent years. It also discusses the design and performance of the recently studied photocatalytic reactors, along with the recent advancements in the visible-light photocatalysis. Additionally, the effects of the fundamental parameters such as temperature, pH, catalyst-loading and reaction time have also been reviewed. Moreover, different techniques that can increase the photocatalytic efficiency as well as recyclability have been systematically presented, followed by a discussion on the photocatalytic treatment of actual wastewater samples and the future challenges associated with it.

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“…The specific absorption rate, often denominated as heating efficiency, is directly related to the heat losses of the MNPs when exposed to the AC field, and it is given by the hysteresis loop area of the MNPs [32]. Therefore, the SAR should be improved by increasing the area of the AC hysteresis loop, which is essentially proportional to the saturation magnetization (Ms) and the coercive field (Hc) of the with each field oscillation) and single domain particle hysteresis effect [32,34]. In these aspects, the size of the particles embedded in our films, as calculated by SAXS measurements (Table 2), is well in the range of those that give the enhanced SAR.…”

Section: Small-angle X-ray Scattering (Saxsmentioning

confidence: 99%

Magnetic nanocomposites based on shape memory polyurethanes

Soto

Meiorin

Actis

et al. 2018

European Polymer Journal

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Shape-memory composites based on a commercial segmented polyurethane and magnetite (Fe 3 O 4) nanoparticles (MNPs) were prepared by a simple suspension casting method. The average sizes of individual magnetic particles/clusters were determined by TEM microscopy and corroborated from SAXS patterns. The magnetization properties of selected samples were evaluated using zero field cooling/field cooling (ZFC/FC) measurements and magnetization loops obtained at different temperatures. The results showed that magnetization at high field (20 kOe) and coercitivity measured at 5 K increase with magnetite content and that all the composite films exhibit superparamagnetic behavior at 300 K. The specific absorption rate (SAR) of the nanocomposites was calculated by experimentally determining both the specific heat capacity and the heating rate of the films exposed to an alternant magnetic field. All nanocomposites were able to increase their temperature when exposed to an alternant magnetic field, although the final temperature reached resulted dependent of the MNPs concentration. What is more, a fast and almost complete recovery of the original shape of the nanocomposites containing more than 3 nominal wt.% MNP was obtained by this remote activation applied to the previously deformed samples.

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Size-dependent electromagnetic properties and the related simulations of Fe3O4 nanoparticles made by microwave-assisted thermal decomposition

Cited by 28 publications

References 51 publications

Precise Study on Size-Dependent Properties of Magnetic Iron Oxide Nanoparticles for In Vivo Magnetic Resonance Imaging

Precise Study on Size-Dependent Properties of Magnetic Iron Oxide Nanoparticles for In Vivo Magnetic Resonance Imaging

Heterogeneous photocatalysis and its potential applications in water and wastewater treatment: a review

Magnetic nanocomposites based on shape memory polyurethanes

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