Magnetically modified bentonite as a possible contrast agent in MRI of gastrointestinal tract

2007 ◽  
Vol 61 (5) ◽  
Author(s):  
H. Bartonkova ◽  
M. Mashlan ◽  
I. Medrik ◽  
D. Jancik ◽  
R. Zboril
Keyword(s):  
Mössbauer Spectroscopy ◽  
Iron Oxide ◽  
Contrast Agent ◽  
Mossbauer Spectroscopy ◽  
Oxide Particle ◽  
Negative Contrast ◽  
Iron Oxide Particle ◽  
Hyperfine Parameters ◽  
Mößbauer Spectroscopy ◽  
Negative Contrast Agent

AbstractA composite of iron oxide nanoparticles and mineral matrix has been studied by XRD, Mössbauer spectroscopy, and TEM. Magnetite and superparamagnetic magnetite have been identified by Mössbauer spectroscopy in the nanocomposite. A relationship between the hyperfine parameters and iron oxide particle size has been confirmed by TEM. The optimal concentration of “magnetite—bentonite” composite, when the MRI signal is fully reduced, was found for using this composite as a negative contrast agent.

Mössbauer spectroscopy study of magnetic iron oxide nanoclusters in a biocomposite based on poly(3-hydroxybutyrate) and chitosan

2015 ◽  
Vol 463 (2) ◽  
pp. 176-178 ◽  
Author(s):  
V. E. Prusakov ◽  
Yu. V. Maksimov ◽  
K. N. Nishchev ◽  
A. V. Golubiev ◽  
A. L. Iordanskii ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Iron Oxide ◽  
Mossbauer Spectroscopy ◽  
Spectroscopy Study ◽  
Magnetic Iron Oxide ◽  
Mößbauer Spectroscopy

Mössbauer spectroscopy of the new iron oxide Fe3B7O13(OH)

2010 ◽  
pp. 101-104
Author(s):  
Shin Nakamura ◽  
Yorihiko Tsunoda ◽  
Ippei Nomoto ◽  
Hirohiko Sato
Keyword(s):  
Mössbauer Spectroscopy ◽  
Iron Oxide ◽  
Mossbauer Spectroscopy ◽  
Mößbauer Spectroscopy

Mössbauer spectroscopy of protein-passivated iron oxide nanoparticles

ICAME 2011 ◽  
2013 ◽  
pp. 269-272
Author(s):  
Heming Huang ◽  
Ramona Christmann ◽  
Roland Ulber ◽  
Volker Schünemann
Keyword(s):  
Mössbauer Spectroscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Mossbauer Spectroscopy ◽  
Oxide Nanoparticles ◽  
Mößbauer Spectroscopy

scholarly journals Investigation of phase transformations of iron nanoparticles during thermal annealing

2019 ◽  
Vol 201 ◽  
pp. 02003
Author(s):  
Dinara Tulebayeva ◽  
Assel Yermekova ◽  
Artem Kozlovskiy ◽  
Maxim Zdorovets
Keyword(s):  
Mössbauer Spectroscopy ◽  
Iron Oxide ◽  
Phase Transformations ◽  
Mossbauer Spectroscopy ◽  
Spectroscopy Data ◽  
X Ray Diffraction ◽  
Mößbauer Spectroscopy ◽  
Structure Of Nanoparticles ◽  
Subsequent Phase ◽  
Annealing Defects

Structural properties and phase composition of nanoparticles based on iron oxide were studied. Mossbauer spectroscopy, X-ray diffraction, and scanning electron microscopy were used for the analysis of phase transformations. According to XRD and Mossbauer spectroscopy data, an increase in the annealing temperature, as well as the subsequent phase transformations of magnetite into maghemite and then to hematite, indicate an improvement in the structure and a decrease in microdistortions in the lattice as a result of annealing defects and vacancies. According to Mossbauer spectroscopy data at temperatures above 400°C, the lines of characteristic FeO, which are characteristic for disordered iron oxide, are observed, which also confirms the improvement of the crystal structure of nanoparticles.

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