scholarly journals Quantitative analyses of oxidation states for cubic SrMnO3 and orthorhombic SrMnO2.5 with electron energy loss spectroscopy

2010 ◽  
Vol 108 (12) ◽  
pp. 124903 ◽  
Author(s):  
S. Kobayashi ◽  
Y. Tokuda ◽  
T. Mizoguchi ◽  
N. Shibata ◽  
Y. Sato ◽  
...  
1985 ◽  
Vol 18 (1-4) ◽  
pp. 285-289 ◽  
Author(s):  
Max T. Otten ◽  
Barbara Miner ◽  
James H. Rask ◽  
Peter R. Buseck

2014 ◽  
Vol 116 (22) ◽  
pp. 223707 ◽  
Author(s):  
Guang Yang ◽  
Shaodong Cheng ◽  
Chao Li ◽  
Jiasong Zhong ◽  
Chuansheng Ma ◽  
...  

2015 ◽  
Vol 51 (91) ◽  
pp. 16377-16380 ◽  
Author(s):  
Raymond R. Unocic ◽  
Loïc Baggetto ◽  
Gabriel M. Veith ◽  
Jeffery A. Aguiar ◽  
Kinga A. Unocic ◽  
...  

We demonstrate the ability to apply electron energy loss spectroscopy (EELS) to follow the chemistry and oxidation states of LiMn2O4 and Li4Ti5O12 battery electrodes within a battery solvent.


2008 ◽  
Vol 1148 ◽  
Author(s):  
Angel M. Arevalo-Lopez ◽  
Elizabeth Castillo-Martinez ◽  
Miguel Ángel Alario-Franco

AbstractWe present in here the study by means of electron energy loss spectroscopy (EELS) of several rutile based oxides, having in common the presence of octahedrally oxygen coordinated chromium, [Cr-O6], in three different formal oxidation states: Cr4+ in CrO2, a regular rutile; Cr3+ in CrOOH, a H bonded orthorrombic distorted rutile and in CrTaO4, a metal disordered rutile and Cr2+ in CrTa2O6 an ordered trirutile structure. A linear relationship is observed between the formal oxidation state of chromium in all these rutile oxides and the separation between the Cr-L2,3 and O-K energy loss peaks.


2004 ◽  
Vol 824 ◽  
Author(s):  
M.L. Carter ◽  
E.R. Vance ◽  
D. R. G. Mitchell ◽  
Z. Zhang

AbstractTwo Bax CsyMnzTi8-zO16 hollandite samples, containing excess rutile, have been prepared, targeting the Mn valence as 3+ by sintering at 1300oC in air (z = 2x +y) and as 2+ (z = x + y/2) in argon. SEM showed the sample sintered in air to contain major hollandite and minor Mn titanate and rutile. The sample sintered in argon contain major hollandite, and minor Ba titanate and rutile. X-ray absorption near edge spectroscopy (XANES), electron energy loss spectroscopy (EELS) and X-ray photoelectron spectroscopy (XPS) were used to determine the oxidation state of the Mn in the samples. Transmission manganese K-edge X-ray absorption spectra of the samples were similar but the precise ratio of oxidation states could not be calculated from these spectra.


2021 ◽  
Vol 197 ◽  
pp. 113790
Author(s):  
Kaustubh Bawane ◽  
Panayotis Manganaris ◽  
Yachun Wang ◽  
Jagadeesh Sure ◽  
Arthur Ronne ◽  
...  

Author(s):  
P. Trebbia ◽  
P. Ballongue ◽  
C. Colliex

An effective use of electron energy loss spectroscopy for chemical characterization of selected areas in the electron microscope can only be achieved with the development of quantitative measurements capabilities.The experimental assembly, which is sketched in Fig.l, has therefore been carried out. It comprises four main elements.The analytical transmission electron microscope is a conventional microscope fitted with a Castaing and Henry dispersive unit (magnetic prism and electrostatic mirror). Recent modifications include the improvement of the vacuum in the specimen chamber (below 10-6 torr) and the adaptation of a new electrostatic mirror.The detection system, similar to the one described by Hermann et al (1), is located in a separate chamber below the fluorescent screen which visualizes the energy loss spectrum. Variable apertures select the electrons, which have lost an energy AE within an energy window smaller than 1 eV, in front of a surface barrier solid state detector RTC BPY 52 100 S.Q. The saw tooth signal delivered by a charge sensitive preamplifier (decay time of 5.10-5 S) is amplified, shaped into a gaussian profile through an active filter and counted by a single channel analyser.


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