scholarly journals Laser deposition of iron in oxygen atmosphere

2011 ◽  
Vol 1 (1) ◽  
pp. 429-433
Author(s):  
Y. Yamada ◽  
A. Ito ◽  
K. Kuono ◽  
H. Yoshida ◽  
Y. Kobayashi
Keyword(s):  
Iron Oxide ◽  
Defect Density ◽  
Lattice Defect ◽  
Oxygen Atmosphere ◽  
Trivalent Iron ◽  
Laser Deposition ◽  
Gas Mixture ◽  
Iron Oxide Particles ◽  
Oxide Particles ◽  
Ar Gas

AbstractIron oxide films were produced by pulsed laser deposition (PLD) of 57Fe metal in an oxygen atmosphere and their compositions were studied by Mössbauer spectroscopy. The effects of gas-phase reactions were investigated by varying the pressure of O2 gas or an O2/Ar gas mixture. When PLD was performed in a high-pressure O2 atmosphere, the main product in the film was trivalent iron oxide particles. When the O2 pressure was reduced, hematite Fe2O3 became dominant in the film, while wüstite FeO was produced at very low O2 pressures. PLD in an O2/Ar gas mixture produced films of trivalent iron oxide particles and hematite solid, but wüstite was not produced. Increasing the substrate temperature during deposition induced annealing of the films, reducing the lattice defect density. X-ray diffraction patterns were obtained to confirm the assignments, and the surface morphologies of the films were investigated by scanning electron microscopy.

scholarly journals Improved Stem Cell MR Detectability in Animal Models by Modification of the Inhalation Gas

2005 ◽  
Vol 4 (2) ◽  
pp. 153535002005041 ◽  
Author(s):  
Uwe Himmelreich ◽  
Ralph Weber ◽  
Pedro Ramos-Cabrer ◽  
Susanne Wegener ◽  
Korinna Kandal ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Blood Vessels ◽  
Gas Mixture ◽  
Iron Oxide Particles ◽  
Physiological Conditions ◽  
Oxide Particles ◽  
Magnetic Resonance Imaging Mri ◽  
Small Clusters ◽  
Large Vessels

In vivo monitoring of cells labeled with paramagnetic iron oxide particles by magnetic resonance imaging (MRI) is complicated by intrinsic contrast of blood vessels. Distinction between T2* effects caused by blood vessels from those caused by labeled cells was so far only possible after carefully following the location of hypointense regions through subsequent slices of T2*-weighted 3-D MRI datasets, a procedure that is time consuming and not always reliable in the case of smaller blood vessels. Here, we demonstrate that the modification of the inhalation gas mixture from the routinely used composition 35% O2 and 65% N2O to a mixture containing 95% O2 and 5% CO2 results in a contrast suppression of most small blood vessels and reduces the intrinsic T2* effect of large vessels dramatically in an animal model. This change in protocol of physiological conditions was well tolerated by all studied animals, even over prolonged experimental times. The changed inhalation gas mixture thus provides a more reliable identification method for small clusters of iron oxide labeled cells in vivo.

scholarly journals Aqueous one-pot synthesis of well-defined zwitterionic diblock copolymers by RAFT polymerization: an efficient and environmentally-friendly route to a useful dispersant for aqueous pigments

2021 ◽  
Vol 23 (3) ◽  
pp. 1248-1258
Author(s):  
Shannon M. North ◽  
Steven P. Armes
Keyword(s):  
Iron Oxide ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Environmentally Friendly ◽  
Iron Oxide Particles ◽  
One Pot ◽  
One Pot Synthesis ◽  
Highly Effective ◽  
Oxide Particles

An atom-efficient, wholly aqueous one-pot synthesis of zwitterionic diblock copolymers has been devised. Such copolymers can serve as highly effective aqueous dispersants for nano-sized transparent yellow iron oxide particles.

scholarly journals Imaging of the Vulnerable Carotid Plaque: Biological Targeting of Inflammation in Atherosclerosis Using Iron Oxide Particles and MRI

2014 ◽  
Vol 59 (5) ◽  
pp. 1472
Author(s):  
J.M.S. Chan ◽  
C. Monaco ◽  
M. Wylezinska-Arridge ◽  
J.L. Tremoleda ◽  
R.G.J. Gibbs
Keyword(s):  
Iron Oxide ◽  
Carotid Plaque ◽  
Iron Oxide Particles ◽  
Oxide Particles

scholarly journals Internalization of annexin A5-functionalized iron oxide particles by apoptotic Jurkat cells

2009 ◽  
Vol 4 (1) ◽  
pp. 24-32 ◽  
Author(s):  
Geralda A. F. van Tilborg ◽  
Tessa Geelen ◽  
Hans Duimel ◽  
Paul H. H. Bomans ◽  
Peter M. Frederik ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Jurkat Cells ◽  
Annexin A5 ◽  
Iron Oxide Particles ◽  
Oxide Particles

Effect of Zeolite on the Dispersion Stability of Iron Oxide Particles

1986 ◽  
Vol 56 (5) ◽  
pp. 309-316 ◽  
Author(s):  
Michiko Kimura ◽  
Motoko Komaki ◽  
Akihiko Yabe
Keyword(s):  
Iron Oxide ◽  
Dispersion Stability ◽  
Iron Oxide Particles ◽  
Oxide Particles

Sentinel lymph node identification using superparamagnetic iron oxide particles versus radioisotope: The French Sentimag feasibility trial

2016 ◽  
Vol 113 (5) ◽  
pp. 501-507 ◽  
Author(s):  
Jean-Louis Houpeau ◽  
Marie-Pierre Chauvet ◽  
François Guillemin ◽  
Cécile Bendavid-Athias ◽  
Hélène Charitansky ◽  
...  
Keyword(s):  
Lymph Node ◽  
Iron Oxide ◽  
Sentinel Lymph Node ◽  
Superparamagnetic Iron Oxide ◽  
Feasibility Trial ◽  
Iron Oxide Particles ◽  
Sentinel Lymph Node Identification ◽  
Superparamagnetic Iron Oxide Particles ◽  
Oxide Particles

Preparation of micron-sized spherical porous iron oxide particles

2003 ◽  
Vol 13 (5) ◽  
pp. 983-985 ◽  
Author(s):  
Allen W. Apblett ◽  
Satish I. Kuriyavar ◽  
B. P. Kiran
Keyword(s):  
Iron Oxide ◽  
Porous Iron ◽  
Iron Oxide Particles ◽  
Oxide Particles
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