Fe3O4nanoparticles prepared by the seeded-growth route for hyperthermia: electron magnetic resonance as a key tool to evaluate size distribution in magnetic nanoparticles

Nanoscale ◽  
2014 ◽  
Vol 6 (13) ◽  
pp. 7542-7552 ◽  
Author(s):  
Idoia Castellanos-Rubio ◽  
Maite Insausti ◽  
Eneko Garaio ◽  
Izaskun Gil de Muro ◽  
Fernando Plazaola ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Resonance ◽  
Size Distribution ◽  
Electron Magnetic Resonance ◽  
Seeded Growth ◽  
High Quality ◽  
Power Absorption ◽  
Size Dependent ◽  
Emr Spectroscopy

High quality seeded grown Fe3O4nanoparticles show strong size dependent magnetic power absorption that can be predicted by EMR spectroscopy.

scholarly journals Copper-manganese-zinc spinels in zeolites: study of EMR spectra

Nukleonika ◽  
2015 ◽  
Vol 60 (3) ◽  
pp. 423-428 ◽  
Author(s):  
Piotr Decyk ◽  
Andrzej B. Więckowski ◽  
Lidia Najder-Kozdrowska ◽  
Iveta Bilkova
Keyword(s):  
Magnetic Resonance ◽  
Electron Magnetic Resonance ◽  
Hy Zeolite ◽  
Manganese Zinc ◽  
Copper Manganese ◽  
The Difference ◽  
Hy Zeolites ◽  
Emr Spectroscopy

Abstract The aim of this study is the application of electron magnetic resonance (EMR) spectroscopy to determine the interactions between NaY and HY zeolites and Cu-Mn-Zn spinels loaded onto the zeolite surfaces. The materials were characterized using XRD and IR spectroscopies. Four types of EMR lines were observed for Cu-Mn-Zn/NaY, Cu-Mn-Zn/HY samples. The difference between the EMR spectra recorded at 77 and 293 K has been shown. The spectra recorded at 77 K allowed us to distinguish between the species formed on NaY and HY zeolites. The EMR spectrum of Cu-Mn-Zn/NaY recorded at 77 K showed only one line attributed to antiferromagnetic spinels Cu1.4Mn1.6O4 and ZnMn2O4 or/and Cu0.5Zn0.5Mn2O4. The spinels appeared to be more stable (more strongly attached) on HY zeolite than on NaY one. It was proved that different strength of interactions between the zeolites and Cu-Mn-Zn spinels was caused by differences in the acidity of NaY and HY zeolites.

scholarly journals EMR study and superposition model analysis of Cr3+ and Fe3+ impurity ions in mullite powders used in aerospace industry

Nukleonika ◽  
2015 ◽  
Vol 60 (3) ◽  
pp. 399-403
Author(s):  
Ireneusz Stefaniuk ◽  
Iwona Rogalska
Keyword(s):  
Electronic Structure ◽  
Magnetic Resonance ◽  
Aerospace Industry ◽  
Model Analysis ◽  
Electron Magnetic Resonance ◽  
Superposition Model ◽  
Grain Sizes ◽  
X Band ◽  
Impurity Ions ◽  
Emr Spectroscopy

Abstract In this work, the electron magnetic resonance (EMR) spectra of the mullites powders were measured for different grain sizes (0.07 and 0.12 mm). We have used EMR spectroscopy at X-band, combined with superposition model (SPM) calculations to reveal electronic structure and establish correlations between structure, and surroundings of these complexes.

scholarly journals Magnetic Nanoparticles Aggregation in Magnetic Gel Studied by Electron Magnetic Resonance (EMR)

2012 ◽  
Vol 2 (2) ◽  
pp. 342-350 ◽  
Author(s):  
Olga N. Sorokina ◽  
Alexander L. Kovarski ◽  
Marina A. Lagutina ◽  
Sergey A. Dubrovskii ◽  
Fridrikh S. Dzheparov
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Resonance ◽  
Electron Magnetic Resonance

scholarly journals Continuous Size-Dependent Sorting of Ferromagnetic Nanoparticles in Laser-Ablated Microchannel

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yiqiang Fan ◽  
Feng Gao ◽  
Huawei Li ◽  
Gang Tang ◽  
Jian Zhuang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Nanoparticles ◽  
Size Distribution ◽  
Rna Virus ◽  
Flow Direction ◽  
Low Cost ◽  
Size Dependent ◽  
Potential Applications ◽  
Size Sorting ◽  
Biological Entities

This paper reports a low-cost method of continuous size-dependent sorting of magnetic nanoparticles in polymer-based microfluidic devices by magnetic force. A neodymium permanent magnet was used to generate a magnetic field perpendicular to the fluid flow direction. Firstly, FeNi3 magnetic nanoparticles were chemically synthesized with diameter ranges from 80 nm to 200 nm; then, the solution of magnetic nanoparticles and a buffer were passed through the microchannel in laminar flow; the magnetic nanoparticles were deflected from the flow direction under the applied magnetic field. Nanoparticles in the microchannel will move towards the direction of high-gradient magnetic fields, and the degree of deflection depends on their sizes; therefore, magnetic nanoparticles of different sizes can be separated and finally collected from different output ports. The proposed method offers a rapid and continuous approach of preparing magnetic nanoparticles with a narrow size distribution from an arbitrary particle size distribution. The proposed new method has many potential applications in bioanalysis field since magnetic nanoparticles are commonly used as solid support for biological entities such as DNA, RNA, virus, and protein. Other than the size sorting application of magnetic nanoparticles, this approach could also be used for the size sorting and separation of naturally magnetic cells, including blood cells and magnetotactic bacteria.

Sensing the quantum behaviour of magnetic nanoparticles by electron magnetic resonance

2016 ◽  
Vol 18 (5) ◽  
pp. 3591-3597 ◽  
Author(s):  
M. Fittipaldi ◽  
R. Mercatelli ◽  
S. Sottini ◽  
P. Ceci ◽  
E. Falvo ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Resonance ◽  
Electron Magnetic Resonance

Magnetic nanoparticles: quantum behaviour sensed by EMR.

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