Fe2O3 nanoparticles for magnetic hyperthermia applications

2015 ◽  
Vol 1779 ◽  
pp. 7-13 ◽  
Author(s):  
O M Lemine ◽  
Karim Omri ◽  
L El Mir ◽  
V Velasco ◽  
Patricia Crespo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Magnetic Hyperthermia ◽  
Fe2o3 Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heating Efficiency ◽  
Hall Method

ABSTRACTSynthesis, structural, magnetic properties and heating efficiency of γ-Fe2O3 nanoparticles have been investigated. X-ray diffraction (XRD) and Mössbauer spectroscopy show that the obtained nanoparticles are mainly composed of maghemite phase (γ-Fe2O3). Williamson-Hall method shows that the crystallite is around 14nm.The specific absorption rate (SAR) under an alternating magnetic field is investigated as a function of frequency. A highest SAR value of 12W/g for frequency 523 kHz was obtained.

Influence of Magnetic Field on Magnetic Properties of Electrodeposited Co-Ni-P Nanowires

2014 ◽  
Vol 24 (3S1) ◽  
pp. 90-94 ◽  
Author(s):  
Le Tuan Tu ◽  
Luu Van Thiem ◽  
Pham Duc Thang
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Hysteresis Loops ◽  
Vibrating Sample Magnetometry ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Structure And Morphology ◽  
The Magnetic Field

The magnetic properties in Co-Ni-P nanowires arrays with diameter of 200 nm were investigated. All the samples were prepared by electrodeposition method with pH of 5.5 and at room temperature. During the deposition, a magnetic field in range of 0 - 750 Oe was applied parallel to the wires axis. The crystalline structure and morphology of the samples were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The hysteresis loops were measured at room temperature using vibrating sample magnetometry (VSM). The mixture of hcp phases of the Co-Ni-P based nanowires has been indicated by the XRD pattern. The obtained results show that with 750 Oe magnetic field applied during deposition we can obtain maximum coercivity value (2180 Oe). The \(M_{r}/M_{s}\) ratio was rapid increased when the magnetic field changed from 0 Oe to 750 Oe.

scholarly journals The Effect of Tissue-Mimicking Phantom Compressibility on Magnetic Hyperthermia

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 803 ◽  
Author(s):  
Katarzyna Kaczmarek ◽  
Radosław Mrówczyński ◽  
Tomasz Hornowski ◽  
Rafał Bielas ◽  
Arkadiusz Józefczak
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Magnetic Materials ◽  
Absorption Rate ◽  
Magnetic Particles ◽  
Specific Absorption Rate ◽  
Magnetic Hyperthermia ◽  
Magnetic Losses ◽  
Small Temperature ◽  
Transmission Electron

During hyperthermia, magnetite nanoparticles placed in an AC magnetic field become a source of heat. It has been shown that in fluid suspensions, magnetic particles move freely and generate heat easily. However, in tissues of different mechanical properties, nanoparticle movement is limited and leads to a small temperature rise in tissue. Therefore, it is crucial to conduct magnetic hyperthermia experiments in similar conditions to the human body. The effect of tissue-mimicking phantom compressibility on the effectiveness of magnetic hyperthermia was investigated on agar phantoms. Single and cluster nanoparticles were synthesized and used as magnetic materials. The prepared magnetic materials were characterized by transmission electron microscopy (TEM), and zeta potential measurements. Results show that tissue-mimicking phantom compressibility decreases with the concentration of agar. Moreover, the lower the compressibility, the lower the thermal effect of magnetic hyperthermia. Specific absorption rate (SAR) values also proved our assumption that tissue-mimicking phantom compressibility affects magnetic losses in the alternating magnetic field (AMF).

Magnetostructural transformations in Ni51Mn36Sn13 Heusler alloy thin films

Open Physics ◽  
2011 ◽  
Vol 9 (2) ◽  
Author(s):  
Karol Załęski ◽  
Janusz Dubowik ◽  
Iwona Gościańska ◽  
Bartłomiej Andrzejewski ◽  
Tomasz Toliński
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
Magnetic Properties ◽  
Transition Temperature ◽  
Heusler Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transport Measurements ◽  
Sputter Deposited ◽  
The Magnetic Field

AbstractIn this paper we report structural, magnetic and transport properties of strongly textured Ni51Mn36Sn13 thin films. The off-stoichiometric Heusler alloy films with 200 nm thickness were sputter-deposited on a MgO(100) substrate at 500 K and after annealed at 1000 K in UHV conditions. The textured growth was confirmed by x-ray diffraction in Bragg-Brentano geometry. The temperature dependence of the magnetic properties was measured by VSM and FMR methods. The electron transport measurements were carried out in function of temperature in 0 Oe and 50 kOe fields. All measurements corroborate the existence of the martensitic transformation in the film. Furthermore, transport measurements reveal an influence of the magnetic field on the transition temperature.

Magnetic and Magnetostrictive Properties of Tb-Dy-Ho-Fe-Co Alloys

2009 ◽  
Vol 152-153 ◽  
pp. 7-10 ◽  
Author(s):  
Irina S. Tereshina ◽  
S.A. Nikitin ◽  
G.A. Politova ◽  
A.S. Ilyushin ◽  
A.A. Opolenko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Rare Earth ◽  
Applied Magnetic Field ◽  
Single Phase ◽  
X Ray Diffraction ◽  
Standard Strain ◽  
X Ray ◽  
Structural And Magnetic Properties ◽  
Co Alloys

In this work, the structural and magnetic properties of single-phase TbxDyyHoz(Fe,Co)2 (x + y + z = 1) alloys have been investigated by means of X-ray diffraction, 57Fe Mossbauer spectroscopy, magnetization measurements and a standard strain gage technique. The magnetostriction of TbxDyyHoz(Fe,Co)2 was examined against an applied magnetic field up to 10 kOe in 80 - 400 K temperature range. The Co-containing compounds are found to have high values of magnetostrictive susceptibility due to compensation of magnetic anisotropy in both the rare-earth and 3d transition metals sublattices.

scholarly journals Synthesis of Poly(N-vinylcaprolactam)-Grafted Magnetite Nanocomposites for Magnetic Hyperthermia

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
A. Morfin-Gutiérrez ◽  
H. Iván Meléndez-Ortiz ◽  
B. A. Puente-Urbina ◽  
L. A. García-Cerda
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Magnetic Hyperthermia ◽  
Heating Equipment ◽  
X Ray Diffraction ◽  
Hyperthermia Treatment ◽  
X Ray ◽  
Transmission Electron ◽  
Ft Ir ◽  
Vibration Sample Magnetometry

In this study, the synthesis, characterization, and application of poly(N-vinylcaprolactam)-grafted magnetite nanocomposites for magnetic hyperthermia are reported. Superparamagnetic magnetite nanoparticles (MagNPs) with sizes in the range of 10–16 nm were synthesized by the coprecipitation method and then functionalized with vinyltrimethoxysilane (VTMS). MagNPs-VTMS coated with poly(N-vinylcaprolactam) (PNVCL) were prepared by free radical polymerization. The obtained materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibration sample magnetometry (VSM), and Fourier transform infrared spectroscopy (FT-IR). The heating ability was evaluated under a magnetic field using a solid state induction heating equipment at 10.2 kA/m and 362 kHz. The MagNPs-PNVCL nanocomposites showed a behavior close to superparamagnetic materials, which is appropriated for magnetic hyperthermia treatment; in concentrations of 8 mg/mL, they were able to heat up, increasing the temperature up to 42°C in a period of time lower than 10 minutes.

scholarly journals Synthesis and Characterization of CeGdZn-Ferrite Nanoparticles as Magnetic Hyperthermia Application Agents

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Saleh S. Hayek
Keyword(s):  
Magnetic Properties ◽  
Magnetic Hyperthermia ◽  
Ferrite Nanoparticles ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Magnetic Nanomaterial ◽  
Encapsulated Nanoparticles

This study focuses on the synthesis and characterization of a magnetic nanomaterial used in magnetic hyperthermia. Cerium gadolinium zinc-iron (CeGdZnFe) magnetic nanoparticles were synthesized by a coprecipitation method for application as magnetic hyperthermia agents. Determination of phase purity and their identification was achieved by X-ray diffraction studies using a Phillips powder diffractometer with Cu Kα radiation. Typical TEM micrographs of the dispersion of CeGdZn-ferrite nanoparticles and CeGdZn-ferrite PEG-encapsulated nanoparticles in ethanol deposited over a Cu grid were taken as part of the characterization techniques to be used for newly developed materials. It was then fitted by a Gaussian distribution with mean diameter dm ±1.0 nm. The investigation of magnetic properties showed that adjusting, Gd and Zn contributes to the nanoparticles added to the adjustment of all magnetic properties of CeGdZnFe.

Adjusting Microstructure and Magnetic Properties of Ni-Mn-In Metamagnetic Shape Memory Alloys by Addition of Gd

2012 ◽  
Vol 535-537 ◽  
pp. 959-963
Author(s):  
Li Na Bai ◽  
Gui Xing Zheng ◽  
Jing Xin ◽  
Jian Jun Zhang
Keyword(s):  
Magnetic Field ◽  
Differential Scanning Calorimetry ◽  
Magnetic Properties ◽  
Shape Memory ◽  
Room Temperature ◽  
Vibrating Sample Magnetometry ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Microstructure And Magnetic Properties

The influences of Gd concentration on martensitic transformation and magnetic properties of NiMnIn alloys were investigated by differential scanning calorimetry (DSC) , vibrating sample magnetometry (VSM), X-ray diffraction (XRD) and etc. It shows that addition of Gd enhances martensite transition temperature and that X-ray diffraction analysis of experimental alloys is revealed which the mixture is martensite and austenite at room temperature. These alloys show promise as a metamagnetic shape memory alloy with magnetic-field-induced shape memory effect.

Magnetic Properties of CdMoO4:Dy3+ Single Crystal

2016 ◽  
Vol 257 ◽  
pp. 107-110 ◽  
Author(s):  
Tadeusz Groń ◽  
Elzbieta Tomaszewicz ◽  
Marek Berkowski ◽  
Monika Oboz ◽  
Joachim Kusz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Single Crystal ◽  
Diffraction Measurement ◽  
X Ray Diffraction ◽  
Weak Response ◽  
X Ray ◽  
Diamagnetic Transition ◽  
The Magnetic Field

X-ray diffraction measurement at 298 K of CdMoO4:Dy3+ showed that the molybdenum ions are tetrahedral coordinated and Cd/Dy – dodecahedral coordinated. The Dy3+ ions are randomly distributed in the unit cell, substituting the Cd2+ ones. The temperature dependence of ac and dc magnetic susceptibility showed a lack of the Curie-Weiss behaviour and a weak response to the magnetic field. The magnetization isotherms, M(H), showed a paramagnetic-diamagnetic transition at 17 K for 〈100〉 direction and at 35 K for 〈001〉 one in the magnetic field of 70 kOe. As the temperature increased this transition was moving toward smaller magnetic fields.

Mechanically Milled Co1-xFexO4 Nanocrystalline for Magnetic Hyperthermia Application

2019 ◽  
Vol 59 ◽  
pp. 25-34
Author(s):  
O.M Lemine ◽  
Sharif Abu Alrub
Keyword(s):  
Magnetic Field ◽  
Magnetic Measurements ◽  
Magnetic Hyperthermia ◽  
Annealed Sample ◽  
Alternating Magnetic Field ◽  
Mass Ratio ◽  
X Ray Diffraction ◽  
Heating Efficiency ◽  
Powder Mass

Mechanical alloying of a mixture of Fe2O3 and CoO powders has been applied for the preparation of nanocrystalline. Utilizing a ball-to-powder mass ratio of 20, milling time of 20 hours followed by annealing at 900°C, we could obtain a nanocrystalline of high crystallinity and composed of mainly CoFe2O4 phase with presence of Fe2O3 as revealed by X-ray diffraction (XRD) measurements. Magnetic measurements using vibrating sample magnetometer (VSM) reveal high saturation magnetization for the annealed sample close to CoFe2O4 phase value. The heating efficiency of the obtained nanocrystalline is studied under an alternating magnetic field and as a function of the concentration. It was found that the nanocrystalline generate a substantial amount of heat when exposed to an alternating magnetic field. In vitro hyperthermia experiment was carried out and our result clearly demonstrates the ability of the obtained nanocrystalline to kill cancer cell through magnetic hyperthermia.

TRANSPORT AND MAGNETIC PROPERTIES OF Bi BASED MULTIPHASE SUPERCONDUCTORS

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3741-3743 ◽  
Author(s):  
P. Vašek ◽  
I. Janeček
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Volume Fraction ◽  
The Other ◽  
Hall Voltage ◽  
X Ray Diffraction ◽  
X Ray ◽  
Effective Medium Approach

A series of (Bi,Pb)SrCuCaO samples with varying volume fraction of the 2223 phase (determined by X-ray diffraction) has been prepared. Temperature dependence of the resistance, Hall effect and magnetic susceptibility has been measured. Neither susceptibility (both dc and ac) nor electrical resistivity in magnetic field reveal the presence of the low temperature (2212) phase. On the other hand the Hall voltage in the mixed state is very sensitive to the presence of different phases. Obtained results have been discussed within the frame of the effective medium approach and related to the growth mechanism of the 2223 phase.

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