scholarly journals Probing the oxygen vacancy distribution in resistive switching Fe-SrTiO3 metal-insulator-metal-structures by micro-x ray absorption near-edge structure

2012 ◽  
Vol 111 (7) ◽  
pp. 076101 ◽  
Author(s):  
Ch. Lenser ◽  
A. Kuzmin ◽  
J. Purans ◽  
A. Kalinko ◽  
R. Waser ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Resistive Switching ◽  
Metal Insulator ◽  
Edge Structure ◽  
Metal Structures ◽  
X Ray ◽  
Metal Insulator Metal ◽  
Vacancy Distribution ◽  
X Ray Absorption

Resistive switching on MgO-based metal-insulator-metal structures grown by molecular beam epitaxy

2014 ◽  
Vol 12 (1-2) ◽  
pp. 246-249 ◽  
Author(s):  
M. Menghini ◽  
C. Quinteros ◽  
C.-Y Su ◽  
P. Homm ◽  
P. Levy ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Resistive Switching ◽  
Molecular Beam ◽  
Metal Insulator ◽  
Metal Structures ◽  
Metal Insulator Metal

scholarly journals Structural Change Analysis of Cerianite in Weathered Residual Rare Earth Ore by Mechanochemical Reduction Using X-ray Absorption Fine Structure

2019 ◽  
Author(s):  
Tatsuya Kato ◽  
Yuki Tsunazawa ◽  
Wenying Liu ◽  
Chiharu Tokoro
Keyword(s):  
Fine Structure ◽  
Rare Earth ◽  
Structural Change ◽  
Oxygen Vacancy ◽  
Structural Changes ◽  
Mechanochemical Reaction ◽  
Edge Structure ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

Prolonged high-intensity grinding can modify the crystal structure of solid substances and/or induce chemical reaction, which is referred to as mechanochemical reaction. Such reactions can exert positive influences on hydrometallurgical processes, therefore, many researchers have applied mechanochemical reactions for metals dissolution from minerals. The mechanism of mechanochemical reaction has been investigated using solid analyses and simulations. Structural changes caused by mechanochemical reaction are not yet sufficiently clarified because the ground samples are amorphous. The objective of this study was to analyze structural changes of cerianite in weathered residual rare earth ore by mechanochemical reduction. Structural change was analyzed by x-ray absorption near-edge structure and extended x-ray absorption fine structure analysis at the cerium LIII- and K-edges. These analyses revealed that the structural change of cerianite in this ore induced by mechanochemical reduction involved oxygen vacancy production. The process of the oxygen vacancy formation was closely coupled with the quantum effect of localization–delocalization of the 4f electron of cerium.

Resistive switching in HfO2-based atomic layer deposition grown metal–insulator–metal structures

2014 ◽  
Vol 312 ◽  
pp. 112-116 ◽  
Author(s):  
Peter Jančovič ◽  
Boris Hudec ◽  
Edmund Dobročka ◽  
Ján Dérer ◽  
Ján Fedor ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Resistive Switching ◽  
Atomic Layer ◽  
Metal Insulator ◽  
Metal Structures ◽  
Layer Deposition ◽  
Metal Insulator Metal

Resistive switching in metal-insulator-metal structures based on germanium oxide and stabilized zirconia

2014 ◽  
Vol 40 (2) ◽  
pp. 101-103 ◽  
Author(s):  
O. N. Gorshkov ◽  
I. N. Antonov ◽  
A. I. Belov ◽  
A. P. Kasatkin ◽  
A. N. Mikhaylov
Keyword(s):  
Resistive Switching ◽  
Germanium Oxide ◽  
Stabilized Zirconia ◽  
Metal Insulator ◽  
Metal Structures ◽  
Metal Insulator Metal

Adsorption and oxidation of SO2 on the surface of TiO2 nanoparticles: the role of terminal hydroxyl and oxygen vacancy–Ti3+ states

2020 ◽  
Vol 22 (18) ◽  
pp. 9943-9953
Author(s):  
Bing Wang ◽  
Xue Li ◽  
Shanshan Liang ◽  
Runxuan Chu ◽  
Dan Zhang ◽  
...  
Keyword(s):  
High Resolution ◽  
Oxygen Vacancy ◽  
Tio2 Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
Flow Chamber ◽  
Oxidation Reactions ◽  
Edge Structure ◽  
X Ray ◽  
X Ray Absorption

The absorption and oxidation reactions of SO2 on TiO2 nanoparticles were investigated by using a flow chamber, synchrotron X-ray absorption near-edge structure and high resolution synchrotron X-ray photoelectron spectroscopy techniques.

Chemical and orientational imaging of polymeric samples

1994 ◽  
Vol 52 ◽  
pp. 68-69
Author(s):  
H. Ade ◽  
B. Hsiao ◽  
G. Mitchell ◽  
E. Rightor ◽  
A. P. Smith ◽  
...  
Keyword(s):  
Ethylene Terephthalate ◽  
National Laboratory ◽  
Brookhaven National Laboratory ◽  
Carbonyl Groups ◽  
Aromatic Rings ◽  
Edge Structure ◽  
X Ray ◽  
Scanning Transmission ◽  
Polymeric Samples ◽  
X Ray Absorption

We have used the Scanning Transmission X-ray Microscope at beamline X1A (X1-STXM) at Brookhaven National Laboratory (BNL) to acquire high resolution, chemical and orientation sensitive images of polymeric samples as well as point spectra from 0.1 μm areas. This sensitivity is achieved by exploiting the X-ray Absorption Near Edge Structure (XANES) of the carbon K edge. One of the most illustrative example of the chemical sensitivity achievable is provided by images of a polycarbonate/pol(ethylene terephthalate) (70/30 PC/PET) blend. Contrast reversal at high overall contrast is observed between images acquired at 285.36 and 285.69 eV (Fig. 1). Contrast in these images is achieved by exploring subtle differences between resonances associated with the π bonds (sp hybridization) of the aromatic groups of each polymer. PET has a split peak associated with these aromatic groups, due to the proximity of its carbonyl groups to its aromatic rings, whereas PC has only a single peak.

Sign in / Sign up

Export Citation Format

Share Document