Influence of the electrolytic medium composition on the structural evolution of thin electrochromic molybdenum trioxide films probed by x-ray absorption spectroscopy

1992 ◽  
Vol 96 (19) ◽  
pp. 7718-7724 ◽  
Author(s):  
Daniel Guay ◽  
Gerard Tourillon ◽  
Guylaine Laperriere ◽  
Daniel Belanger
Keyword(s):  
Absorption Spectroscopy ◽  
Molybdenum Trioxide ◽  
Structural Evolution ◽  
Medium Composition ◽  
X Ray ◽  
X Ray Absorption

Observation of early ZIF-8 crystallization stages with X-ray absorption spectroscopy

Soft Matter ◽  
2021 ◽  
Author(s):  
Ana Guilherme Buzanich ◽  
Anicó Kulow ◽  
Anke Kabelitz ◽  
Christian Grunewald ◽  
Robert Seidel ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Structural Evolution ◽  
X Ray ◽  
X Ray Absorption

The present study investigates structural evolution of early ZIF-8 crystallization up to 5 minutes post mixing of precursor solutions using Dispersive X-ray Absorption Spectroscopy (DXAS).

scholarly journals Tracking the Chemical and Structural Evolution of the TiS2 Electrode in the Lithium-Ion Cell Using Operando X-ray Absorption Spectroscopy

Nano Letters ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 4506-4515 ◽  
Author(s):  
Liang Zhang ◽  
Dan Sun ◽  
Jun Kang ◽  
Hsiao-Tsu Wang ◽  
Shang-Hsien Hsieh ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Structural Evolution ◽  
Lithium Ion ◽  
X Ray ◽  
Lithium Ion Cell ◽  
X Ray Absorption

scholarly journals Structural Evolution of MoO3 Thin Films Deposited on Copper Substrates upon Annealing: An X-ray Absorption Spectroscopy Study

2019 ◽  
Vol 4 (2) ◽  
pp. 41 ◽  
Author(s):  
Macis ◽  
Rezvani ◽  
Davoli ◽  
Cibin ◽  
Spataro ◽  
...  
Keyword(s):  
Thin Films ◽  
Absorption Spectroscopy ◽  
Structural Changes ◽  
Structural Evolution ◽  
Ex Situ ◽  
Edge Structure ◽  
X Ray ◽  
High Gradients ◽  
Different Temperatures ◽  
X Ray Absorption

Structural changes of MoO3 thin films deposited on thick copper substrates upon annealing at different temperatures were investigated via ex situ X-Ray Absorption Spectroscopy (XAS). From the analysis of the X-ray Absorption Near-Edge Structure (XANES) pre-edge and Extended X-ray Absorption Fine Structure (EXAFS), we show the dynamics of the structural order and of the valence state. As-deposited films were mainly disordered, and ordering phenomena did not occur for annealing temperatures up to 300 °C. At ~350 °C, a dominant α-MoO3 crystalline phase started to emerge, and XAS spectra ruled out the formation of a molybdenum dioxide phase. A further increase of the annealing temperature to ~500 °C resulted in a complex phase transformation with a concurrent reduction of Mo6+ ions to Mo4+. These original results suggest the possibility of using MoO3 as a hard, protective, transparent, and conductive material in different technologies, such as accelerating copper-based devices, to reduce damage at high gradients.

Beyond structure: ultrafast X-ray absorption spectroscopy as a probe of non-adiabatic wavepacket dynamics

2016 ◽  
Vol 194 ◽  
pp. 117-145 ◽  
Author(s):  
Simon P. Neville ◽  
Vitali Averbukh ◽  
Serguei Patchkovskii ◽  
Marco Ruberti ◽  
Renjie Yun ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Excited State ◽  
Absorption Spectroscopy ◽  
Vacuum Ultraviolet ◽  
Chemical Shifts ◽  
Structural Evolution ◽  
Time Resolved ◽  
X Ray ◽  
Wavepacket Dynamics ◽  
X Ray Absorption

The excited state non-adiabatic dynamics of polyatomic molecules, leading to the coupling of structural and electronic dynamics, is a fundamentally important yet challenging problem for both experiment and theory. Ongoing developments in ultrafast extreme vacuum ultraviolet (XUV) and soft X-ray sources present new probes of coupled electronic-structural dynamics because of their novel and desirable characteristics. As one example, inner-shell spectroscopy offers localized, atom-specific probes of evolving electronic structure and bonding (via chemical shifts). In this work, we present the first on-the-fly ultrafast X-ray time-resolved absorption spectrum simulations of excited state wavepacket dynamics: photo-excited ethylene. This was achieved by coupling the ab initio multiple spawning (AIMS) method, employing on-the-fly dynamics simulations, with high-level algebraic diagrammatic construction (ADC) X-ray absorption cross-section calculations. Using the excited state dynamics of ethylene as a test case, we assessed the ability of X-ray absorption spectroscopy to project out the electronic character of complex wavepacket dynamics, and evaluated the sensitivity of the calculated spectra to large amplitude nuclear motion. In particular, we demonstrate the pronounced sensitivity of the pre-edge region of the X-ray absorption spectrum to the electronic and structural evolution of the excited-state wavepacket. We conclude that ultrafast time-resolved X-ray absorption spectroscopy may become a powerful tool in the interrogation of excited state non-adiabatic molecular dynamics.

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