X-ray absorption near edge structures (XANES) in simple and complex Mn compounds

Belli, M.; Scafati, A.; Bianconi, A.; Mobilio, Settimio; Palladino, L.; Reale, A.; Burattini, E.

doi:10.1016/0038-1098(80)90515-3

Cited by 268 publications

(152 citation statements)

References 24 publications

Supporting

Mentioning

136

Contrasting

Unclassified

Order By: Relevance

“…It was suggested that the intensity of the peak B is proportional to a displacement of Ti atoms from the center of the TiO 6 octahedra [30] but inversely related to the Ti-O bond length. The peak C is a 4p-related "shape resonance" in the continuum part of the spectrum and the peak D is attributed to more delocalized states [34,35]. The XANES spectra show almost no edge shift as a function of x but its intensity and shape change systematically with x.…”

Section: Xafs Studymentioning

confidence: 93%

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

et al. 2012

View full text Add to dashboard Cite

Section: Xafs Studymentioning

confidence: 93%

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

et al. 2012

View full text Add to dashboard Cite

“…The most striking evidence of the changes in the Mn valence state towards Mn 3+ is observed with the systematic shift of the L2 and L3 spectral weights towards lower photon energies [26][27][28][29] as a function of increasing strain. The spectral shift is due to changes in the electrostatic energy at the Mn site driven by the decrease in the 3d count, which leads to shifts of both the core level and the final-state wavefunctions 27,30 . The observed total chemical shift of approximately 0.7 eV is immediately obvious to the eye for the L2 edge (see Figure 1a) and can be verified for the L3 edge via appropriate peak fitting, which is necessary due to the more complex structure of the excitonic region of the L3 edge.…”

Section: Textmentioning

confidence: 99%

Strain-Engineered Oxygen Vacancies in CaMnO₃ Thin Films

et al. 2017

View full text Add to dashboard Cite

We demonstrate a novel pathway to control and stabilize oxygen vacancies in complex transition-metal oxide thin films. Using atomic layer-by-layer pulsed laser deposition (PLD) from two separate targets, we synthesize high-quality singlecrystalline CaMnO 3 films with systematically varying oxygen vacancy defect formation energies as controlled by coherent tensile strain. The systematic increase of the oxygen vacancy content in CaMnO 3 as a function of applied in-plane strain is observed and confirmed experimentally using high-resolution soft X-ray absorption spectroscopy (XAS) in conjunction with bulk-sensitive hard X-ray photoemission spectroscopy (HAXPES). The relevant defect states in the densities of states are identified and the vacancy content in the films quantified using the combination of first-principles theory and core−hole multiplet calculations with holistic fitting. Our findings open up a promising avenue for designing and controlling new ionically active properties and functionalities of complex transition-metal oxides via strain-induced oxygen-vacancy formation and ordering.

show abstract

“…Using the 'fingerprint' of the Mn K-edge XAS, we can easily exclude the possibility of MnO 2 . 35,36 A small positive shift of the absorption edge compared with pristine MnO@C could be related to the pulverization of the MnO during the charge/discharge process. 37 The radial-structure functions of the Mn K-edge (Figure 8c) Tuning MnO nanowire synthesis seeded by Si particles H Wei et al demonstrate the obvious increase in the peak height at 1.5 angstroms, implying an increase in the ordering of the O 2 À ions in the MnO structure, which induces the fast diffusion of Li ions and a low internal resistance.…”

Section: Electrochemical Properties Of Mno@c Nanowirementioning

confidence: 99%

Tuning ultrafine manganese oxide nanowire synthesis seeded by Si particles and its superior Li storage behaviors

Wei

et al. 2016

NPG Asia Mater

View full text Add to dashboard Cite

The nanostructure and the dimension of materials greatly affect their performance and function. It is important to develop synthesis strategies that enable the control of the materials' morphology and structure and further reduce their size. In the present work, we report a novel synthesis approach that utilizes Si nanoparticles for synthesizing ultrafine MnO nanowires. The resulting nanostructure comprises MnO nanowires with a diameter of~5-10 nm embedded in an amorphous carbon matrix. X-ray diffraction patterns and high-resolution transmission electron microscopy images clearly reveal the growth mechanism of nanowires. As an anode material for the lithium-ion battery, the nanostructure exhibits excellent charge transfer kinetics and extremely high electrochemical performance, including reversible specific capacities of 285.9 mA h g − 1 at 30 A g − 1 and 757.4 mA h g − 1 at 1 A g − 1 after 1000 cycles. X-ray absorption fine structure (XAFS) confirms that the enhanced performance is related to the increase of the ordering of the O 2 − ions in the MnO structure during the charge/discharge processes. This novel synthesis strategy may inspire studies of other transition-metal-oxide nanomaterials with special orientation to tune their physical chemistry properties.

show abstract

X-ray absorption near edge structures (XANES) in simple and complex Mn compounds

Cited by 268 publications

References 24 publications

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

Strain-Engineered Oxygen Vacancies in CaMnO₃ Thin Films

Tuning ultrafine manganese oxide nanowire synthesis seeded by Si particles and its superior Li storage behaviors

Contact Info

Product

Resources

About

X-ray absorption near edge structures (XANES) in simple and complex Mn compounds

Cited by 268 publications

References 24 publications

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

Strain-Engineered Oxygen Vacancies in CaMnO3 Thin Films

Tuning ultrafine manganese oxide nanowire synthesis seeded by Si particles and its superior Li storage behaviors

Contact Info

Product

Resources

About

Strain-Engineered Oxygen Vacancies in CaMnO₃ Thin Films