A combined micro-Raman, X-ray absorption and magnetic study to follow the glycerol-assisted growth of epsilon-iron oxide sol-gel coatings

BiFeO3 is considered as a single phase multiferroic. However, its magnetism is very weak. We study the magnetic properties of BiFeO3 by Cu and (Cu, Zn). Polycrystalline samples Bi(Fe0.95Cu0.05)O3 and BiFe0.95(Zn0.025Cu0.025)O3 are prepared by the sol-gel method. The magnetic properties of BiFe0.95(Zn0.025Cu0.025)O3 are greater than that of BiFeO3 and Bi(Fe0.95Cu0.05)O3. The analyses of X-ray absorption fine structure data show that the doped Cu atoms well occupy the sites of the Fe atoms. X-ray absorption near edge spectra data confirm that the valence state of Fe ions does not change. Cu and Zn metal ion co-doping has no impact on the local structure of the Fe and Bi atoms. The modification of magnetism by doping Zn can be understood by the view of the occupation site of non-magnetically active Zn2+.

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CuOX Films for NO2 Detection: Microstructural Characterization

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.481.133 ◽

2013 ◽

Vol 481 ◽

pp. 133-136 ◽

Cited By ~ 3

Author(s):

T.N. Myasoedova ◽

G.E. Yalovega ◽

N.K. Plugotarenko ◽

M. Brzhezinskaya ◽

V.V. Petrov ◽

...

Keyword(s):

Gas Sensors ◽

Secondary Electron ◽

Operating Temperature ◽

Sol Gel ◽

Microstructural Characterization ◽

Temperature Treatment ◽

Copper Oxides ◽

Edge Structure ◽

X Ray ◽

X Ray Absorption

Copper oxides films as promising materials for gas sensors applications were studied. Copper oxide films were deposited onto Si/SiO2substrates using a citrate sol-gel method with the subsequent temperature treatment at 150-5000C. These films were characterized by means of secondary electron microscopy (SEM) and X-ray-absorption near-edge structure (XANES) spectroscopy. The prepared films were utilized in NO2sensors. The dependences of the NO2response on the operating temperature and NO2concentration (10-200 ppm) were investigated. The maximum NO2response was achieved for the film annealed at 2500C.

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An X-ray Absorption Spectroscopy Study of the Ni K Edge in NiO−SiO2Nanocomposite Materials Prepared by the Sol−Gel Method

The Journal of Physical Chemistry B ◽

10.1021/jp9927911 ◽

1999 ◽

Vol 103 (46) ◽

pp. 10081-10086 ◽

Cited By ~ 34

Author(s):

A. Corrias ◽

G. Mountjoy ◽

G. Piccaluga ◽

S. Solinas

Keyword(s):

Absorption Spectroscopy ◽

Sol Gel ◽

Spectroscopy Study ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

X Ray Absorption

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X-ray absorption and XPS study of titanium mixed oxides synthesized by the sol–gel method

Journal of Electron Spectroscopy and Related Phenomena ◽

10.1016/s0368-2048(00)00323-6 ◽

2001 ◽

Vol 114-116 ◽

pp. 307-311 ◽

Cited By ~ 14

Author(s):

José E. Gonçalves ◽

Sandra C. Castro ◽

Aline Y. Ramos ◽

Maria C.M. Alves ◽

Yoshitaka Gushikem

Keyword(s):

Mixed Oxides ◽

Sol Gel ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Xps Study ◽

X Ray Absorption

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Effects of Lattice Defects on Cathode Properties of LiMn2O4 Synthesized at Low Temperatures for Lithium Ion Secondary Battery

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.388.41 ◽

2008 ◽

Vol 388 ◽

pp. 41-44 ◽

Cited By ~ 1

Author(s):

Hiroyuki Kaiya ◽

Shinya Suzuki ◽

Masaru Miyayama

Keyword(s):

Absorption Spectroscopy ◽

Low Temperatures ◽

Heating Temperature ◽

Sol Gel ◽

Lithium Ion ◽

Lattice Defects ◽

X Ray ◽

Secondary Battery ◽

Cation Mixing ◽

X Ray Absorption

Effects of lattice defects on cathode properties of LiMn2O4 synthesized at low temperatures were investigated. LiMn2O4 powders were synthesized by a sol-gel method. The specific capacities of LiMn2O4 decreased from 134 to 81 mAh g-1 with decreasing heating temperature from 750 to 200°C. X-ray absorption spectroscopy showed that a large amount of lattice defects such as cation vacancies existed and cation mixing occurred in LiMn2O4 calcined at low temperatures. It was found that the low specific capacities of LiMn2O4 calcined at low temperatures were attributed to these lattice defects.

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The Local Atomic Structure of Colloidal Superparamagnetic Iron Oxide Nanoparticles for Theranostics in Oncology

Biomedicines ◽

10.3390/biomedicines6030078 ◽

2018 ◽

Vol 6 (3) ◽

pp. 78 ◽

Cited By ~ 1

Author(s):

Elena Kuchma ◽

Stanislav Kubrin ◽

Alexander Soldatov

Keyword(s):

Iron Oxide ◽

Atomic Structure ◽

Superparamagnetic Iron Oxide ◽

Local Atomic Structure ◽

Superparamagnetic Nanoparticles ◽

Characterization Methods ◽

X Ray ◽

Magnetic Structures ◽

Radiation Sources ◽

X Ray Absorption

The paper contains an overview of modern spectroscopic methods for studying the local atomic structure of superparamagnetic nanoparticles based on iron oxide (SPIONs), which are an important class of materials promising for theranostics in oncology. Practically important properties of small and ultra small nanoparticles are determined primarily by their shape, size, and features of the local atomic, electronic, and magnetic structures, for the study of which the standard characterization methods developed for macroscopic materials are not optimal. The paper analyzes results of the studies of SPIONs local atomic structure carried out by X-ray absorption spectroscopy at synchrotron radiation sources and Mössbauer spectroscopy during the last decade.

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Adsorption of arsenic(V) onto single sheet iron oxide: X-ray absorption fine structure and surface complexation

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2019.07.024 ◽

2019 ◽

Vol 554 ◽

pp. 433-443 ◽

Cited By ~ 3

Author(s):

Zhou Yin ◽

Johannes Lützenkirchen ◽

Nicolas Finck ◽

Noémie Celaries ◽

Kathy Dardenne ◽

...

Keyword(s):

Fine Structure ◽

Iron Oxide ◽

Surface Complexation ◽

X Ray ◽

Absorption Fine ◽

Sheet Iron ◽

Single Sheet ◽

X Ray Absorption

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The Atomic-Scale Interaction of Bioactive Glasses with Simulated Body Fluid

Materials Science Forum ◽

10.4028/www.scientific.net/msf.480-481.21 ◽

2005 ◽

Vol 480-481 ◽

pp. 21-26 ◽

Cited By ~ 5

Author(s):

L.J. Skipper ◽

F.E. Sowrey ◽

D.M. Pickup ◽

R.J. Newport ◽

K.O. Drake ◽

...

Keyword(s):

Simulated Body Fluid ◽

Body Fluid ◽

Sol Gel ◽

Atomic Scale ◽

X Ray Diffraction ◽

Bioactive Glasses ◽

Edge Structure ◽

X Ray ◽

X Ray Absorption

The formation of a carbonate-containing hydroxyapatite, HCAp, layer on bioactive calcium silicate sol-gel glass of the formula (CaO)0.3(SiO2)0.7 has been studied in-vitro in Simulated Body Fluid (SBF). Extended X-ray Absorption Fine Structure (EXAFS), X-ray Absorption Near Edge Structure (XANES), X-ray diffraction (XRD), and solid state nuclear magnetic resonance (NMR) measurements have been performed with results showing the formation of a significantly amorphous HCAp layer after less than 5 hours in solution.

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