Structural analysis by synchrotron X-ray diffraction, X-ray absorption fine structure and transmission electron microscopy for aluminum-substituted α-type nickel hydroxide electrode

2009 ◽  
Vol 193 (2) ◽  
pp. 871-877 ◽  
Author(s):  
Masanori Morishita ◽  
Tadashi Kakeya ◽  
Seijiro Ochiai ◽  
Tetsuya Ozaki ◽  
Yoshiteru Kawabe ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fine Structure ◽  
Structural Analysis ◽  
Nickel Hydroxide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
X Ray Absorption ◽  
Type Nickel

Structural, morphological, and magnetic study of nanocrystalline cobalt-copper powders synthesized by the polyol process

1995 ◽  
Vol 10 (6) ◽  
pp. 1546-1554 ◽  
Author(s):  
G.M. Chow ◽  
L.K. Kurihara ◽  
K.M. Kemner ◽  
P.E. Schoen ◽  
W.T. Elam ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Copper Powders ◽  
Face Centered ◽  
Increasing Temperature ◽  
X Ray Absorption

Nanocrystalline CoxCu100−x (4 ⋚ x ⋚ 49 at. %) powders were prepared by the reduction of metal acetates in a polyol. The structure of powders was characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), extended x-ray absorption fine structure (EXAFS) spectroscopy, solid-state nuclear magnetic resonance (NMR) spectroscopy, and vibrating sample magnetometry (VSM). As-synthesized powders were composites consisting of nanoscale crystallites of face-centered cubic (fcc) Cu and metastable face-centered cubic (fcc) Co. Complementary results of XRD, HRTEM, EXAFS, NMR, and VSM confirmed that there was no metastable alloying between Co and Cu. The NMR data also revealed that there was some hexagonal-closed-packed (hcp) Co in the samples. The powders were agglomerated, and consisted of aggregates of nanoscale crystallites of Co and Cu. Upon annealing, the powders with low Co contents showed an increase in both saturation magnetization and coercivity with increasing temperature. The results suggested that during preparation the nucleation of Cu occurred first, and the Cu crystallites served as nuclei for the formation of Co.

Characterization of U(VI)-Acidithiobacillus ferrooxidans complexes using EXAFS, transmission electron microscopy, and energy-dispersive X-ray analysis

2003 ◽  
Vol 91 (10) ◽  
Author(s):  
Mohamed Merroun ◽  
C. Hennig ◽  
A. Rossberg ◽  
T. Reich ◽  
S. Selenska-Pobell
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fine Structure ◽  
Acidithiobacillus Ferrooxidans ◽  
Energy Dispersive ◽  
X Ray ◽  
Transmission Electron ◽  
Molecular Scale ◽  
X Ray Absorption

SummaryWe used a combination of Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy, Transmission Electron Microscopy (TEM) and Energy-Dispersive X-ray (EDX) analysis to conduct molecular scale studies on U(VI) interaction with three recently described eco-types of

scholarly journals Состав, электронное и атомное строение наночастиц палладия при различных концентрациях металла в матрице полиэтилена

2020 ◽  
Vol 46 (7) ◽  
pp. 20
Author(s):  
С.С. Подсухина ◽  
А.В. Козинкин ◽  
В.Г. Власенко ◽  
Г.Ю. Юрков ◽  
О.В. Попков
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Palladium Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coordination Numbers ◽  
Transmission Electron ◽  
High Pressure Polyethylene ◽  
Average Size ◽  
X Ray Absorption

The composition, electronic and atomic structure of palladium nanoparticles stabilized in high pressure polyethylene (with palladium concentrations of 10 and 20 mass%) were studied by transmission electron microscopy, X-ray diffraction, and X-ray absorption spectroscopy. It was found that nanoparticles consist of metal (Pd) and oxide (Pd2O3) components, and their average size and coordination numbers for first Pd coordination sphere decrease(from 7 to 6 nm and from 7 to 5.7, respectively) with a decrease in metal concentration.

Study of structural characteristics of the FePt nanosystem by TEM

2020 ◽  
Vol 63 (7) ◽  
pp. 79-84
Author(s):  
Yury A. Zaharov ◽  
◽  
Nikita S. Zaharov ◽  
Anna N. Popova ◽  
Dmitry M. Russakov ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Structural Analysis ◽  
Structural Characteristics ◽  
Structural Parameters ◽  
Fept Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Tem Method

In this work, using the example of a bimetallic nanoscale system FePt, a new approach to the assessment of the structural parameters of nanoscale mono- and polymetallic systems by transmission electron microscopy (TEM) is proposed. The data obtained by the TEM method are compared with the data obtained by the method of X-ray structural analysis. Some crystallographic parameters, such as the interplanar distances, average sizes, and phase compositions of the studied nanoparticles of the FePt system are calculated. The most widespread method for obtaining information about the crystal structure of nanosized particles is the method based on the phenomenon of X-ray diffraction. It allows one to determine the phase composition and perform structural analysis of a substance, as well as to estimate the size of the resulting particles. In this method, crystallographic information arises due to X-ray diffraction from the entire surface of the powder. Thus, the researcher sees an integral diffraction pattern. In this case, the study of individual nanoparticles by X-ray structural analysis is extremely difficult. However, the number of methods for assessing structural parameters is not limited to X-ray diffraction methods. In this work, an approach is made to study the structural characteristics of FePt nanoparticles by transmission electron microscopy (TEM), since high-resolution microimages obtained by the TEM method provide a unique opportunity to distinguish individual atoms of the crystal lattice of the objects under study.

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