Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine

Burnham, Philip; Dollahon, Norman R.; Li, C. H.; Viescas, A. J.; Papaefthymiou, Georgia C.

doi:10.1155/2013/181820

Cited by 28 publications

(21 citation statements)

References 49 publications

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“…Thus, Néel relaxation of a small fraction of the iron particles is probably the main active mechanism. Despite the small SAR values, the heating rate is similar to several results found in the literature [20,21].…”

Section: Heat Releasesupporting

confidence: 88%

Mechano-synthesis, structural and magnetic characterization, and heat release of α-Fe nanoparticles embedded in a wüstite matrix

Batista

Morales

Santos

et al. 2015

Journal of Magnetism and Magnetic Materials

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a b s t r a c tWe report a study of the structural and magnetic properties, as well as of the heat release, of an iron/ wüstite composite, prepared from iron powder and water by high energy mechanical milling. We identify that the produced sample consists of α-Fe nanoparticles embedded in a wüstite matrix and has high stability in time. Moreover, we observe that it presents noticeable features, as exchange bias effect at low temperatures and, when an alternating magnetic field is applied, its temperature reaches ∼46°C in ∼600 s. Thus, the results and the possibility of tuning the magnetic properties of α-Fe nanoparticles embedded in a wüstite matrix, through interface interactions, place this system as a very attractive candidate for biomedical applications such as magnetic hyperthermia agent for cancer therapy.

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Section: Heat Releasesupporting

confidence: 88%

Mechano-synthesis, structural and magnetic characterization, and heat release of α-Fe nanoparticles embedded in a wüstite matrix

Batista

Morales

Santos

et al. 2015

Journal of Magnetism and Magnetic Materials

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“…According to the result, it was evident that all of the as-prepared nanostructures show sharp absorption peaks in the range of 520–610 cm –1 known for the iron oxide Fe–O stretching backbone vibrations at tetrahedral sites. 32 Nevertheless, it is also noticed that the peak was shifted to shorter wavenumbers as the SPN was surface functionalized. FTIR spectra revealed that the Fe–O peak for bare SPN was observed at 543.88 cm –1 .…”

Section: Resultsmentioning

confidence: 99%

Surface-Functionalized Superparamagnetic Nanoparticles (SPNs) for Enhanced Oil Recovery: Effects of Surface Modifiers and Their Architectures

et al. 2019

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Superparamagnetic nanoparticles (SPNs) have been considered as one of the most studied nanomaterials for subsurface applications, including in enhanced oil recovery (EOR), due to their unique physicochemical properties. However, a comprehensive understanding of the effect of surface functionalization on the ability of the nanoparticles to improve secondary and tertiary oil recoveries remains unclear. Therefore, investigations on the application of bare and surface-functionalized SPNs in EOR using a sand pack were carried out in this study. Here, the as-prepared SPNs were functionalized using oleic acid (OA) and polyacrylamide (PAM) to obtain several types of nanostructure architectures such as OA-SPN, core–shell SPN@PAM, and SPN-PAM. Based on the result, it is found that both the viscosity and mobility of the nanofluids were significantly affected by not only the concentration of the nanoparticles but also the type and architecture of the surface modifier, which dictated particle hydrophilicity. According to the sand pack tests, the nanofluid containing SPN-PAM was able to recover as much as 19.28% of additional oil in a relatively low concentration (0.9% w/v). The high oil recovery enhancement was presumably due to the ability of suspended SPN-PAM to act as a mobility control and wettability alteration agent and facilitate the formation of a Pickering emulsion and disjoining pressure.

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“…The FTIR spectra of Figure 4.6 show a comparison of the IONPs/OA, IONPs/OA/AN/PVA, and AN in the wavenumber ranging from 4000 cm -1 to 500 cm -1 . The observed spectrum of IONPs/OA agrees with those previously published by various researchers [169,[174][175][176]. The analysis of IONPs/OA and IONPs/OA/AN/PVA indicates absorption peaks at 580 cm -1 , corresponding to the Fe-O vibration related to the magnetite phase [71].…”

Section: Ftir Spectroscopy and Tgasupporting

confidence: 89%

Synthesis and characterization of magnetic nanoparticles for biomedical applications

Arsalani¹

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Arsalani, Soudabeh. Synthesis and Characterization of Magnetic Nanoparticles for Biomedical Applications. 2020. 127p. A thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy Department of Physics, Faculty of Philosophy, Sciences and literature of Ribeirão Preto -SP, 2020.Magnetic nanomaterials with specific size and shape distributions have attracted a large interest in recent years due to their promising properties for biomedical applications. This thesis presents the results of the synthesis and characterization of superparamagnetic iron oxide nanoparticles (SPIONs) for biomedical applications. The first group of SPIONs was prepared by a simple green co-precipitation method at a mild temperature and capping by natural rubber latex (NRL) extracted from Hevea brasiliensis. The results showed core size, size distribution, magnetization and blocking temperature of the magnetic nanoparticles (MNPs) could be controlled by the NRL concentration. Importantly, NRL-coated MNPs showed higher magnetization compared to the bare MNPs that can suggest NRL is an effective stabilizing agent to cover MNPs with enhancing magnetization for biomedical applications. The performance of the bare MNPs and NRL-coated MNPs were investigated by magnetic resonance imaging (MRI) system. MRI results showed R2 relaxation strongly depends on the NRL shell thickness of MNPs and it decreases by increasing the shell thickness of NRL. In addition, the relaxivity ratios (r2/r1) can be controlled by adjusting the concentration of NRL. Therefore, NRL coated MNPs can be considered as effective contrast agents for MRI applications. The second group of SPIONs with fluorescent and radioluminescent properties were synthesized by the thermal decomposition method, covered with oleic acid (OA) and modified by anthracene (AN) and polyvinyl alcohol (PVA) as fluorophore and the dispersion agent in aqueous solution, respectively. This multifunctional nanocomposite exhibited sharp blue emission bands upon exposure to UV and X-ray. Furthermore, the radioluminescence intensity of this nanocomposite showed a linear relation with the X-ray dose rate, that is highly desirable for biomedical applications. The last part of this thesis was devoted to narrow the size distribution of IONP (EMG 700, Ferrotec) coated with anionic surfactants that carried out using low gradient magnetic separation (LGMS) (<15 T/m) method, to improve their performance as magnetic particles imaging (MPI) tracers. Samples before and after LGMS with different concentrations of magnetite (Fe3O4) nanoparticles were imaged in a preclinical MPI scanner. The images of the samples after separation showed an improved MPI resolution. Furthermore, we show that the LGMS technique is capable of separating larger MNP entities from the suspension in a short period of time which allowed us to adjust the size distribution and magnetic properties of MNP via timecontrolled magnetic separation.

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Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine

Cited by 28 publications

References 49 publications

Mechano-synthesis, structural and magnetic characterization, and heat release of α-Fe nanoparticles embedded in a wüstite matrix

Mechano-synthesis, structural and magnetic characterization, and heat release of α-Fe nanoparticles embedded in a wüstite matrix

Surface-Functionalized Superparamagnetic Nanoparticles (SPNs) for Enhanced Oil Recovery: Effects of Surface Modifiers and Their Architectures

Synthesis and characterization of magnetic nanoparticles for biomedical applications

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