scholarly journals Domain Structural Transition and Structural Heterogeneity in GeO2 Glass Under Densification

ACS Omega ◽  
2020 ◽  
Vol 5 (45) ◽  
pp. 29092-29101
Author(s):  
LeTien Ha ◽  
Pham Huu Kien
Keyword(s):  
Structural Transition ◽  
Structural Heterogeneity ◽  
Geo2 Glass

Nanoscale Structural and Chemical Segregation in Pt50Ru50 Electrocatalysts

2001 ◽  
Vol 7 (S2) ◽  
pp. 1112-1113
Author(s):  
Rhonda M. Stroud ◽  
Jeffrey W. Long ◽  
Karen E. Swider-Lyons ◽  
Debra R. Rolison
Keyword(s):  
Methanol Oxidation ◽  
Structural Heterogeneity ◽  
Oxidation Activity ◽  
Bimetallic Alloy ◽  
Transmission Electron ◽  
Chemical Segregation ◽  
High Fraction ◽  
Argon Mixture ◽  
Microscopy Techniques ◽  
Electron Energy Loss

To address how the chemical and structural heterogeneity of Pt50Ru50 nanoparticles affects methanol oxidation activity, we have employed an arsenal of transmission electron microscopy techniques (conventional bright field-imaging, selected area diffraction, atomic-resolution lattice imaging, electron-energy loss spectroscopy, and energy-dispersive x-ray spectroscopy) to characterize 2.5-nm particles in differing oxidation and hydration states. Our studies demonstrate that electrocatalysts containing a high fraction of Ru-rich hydrous oxide, as apposed to the anhydrous PtRu bimetallic alloy, have as much as 250x higher methanol oxidation activityThe nominally 2.5-nm Pt50Ru50 particles were studied in as-received, reduced and reoxidized forms. The reducing treatment consisted of 2 h at 100 °C in flowing 10% PL/argon mixture. For re-oxidation, the reduced particles were heated for 20 h at 100 °C in an H2O-saturated oxygen atmosphere. The particles were suspended in methanol, and pipetted onto holey-carboncoated Cu grids for TEM studies.

scholarly journals Mott Switching and Structural Transition in the Metal Phase of VO2 Nanodomain

2021 ◽  
Vol 3 (2) ◽  
pp. 605-610
Author(s):  
Chang-Yong Kim ◽  
Tetiana Slusar ◽  
Jinchul Cho ◽  
Hyun-Tak Kim
Keyword(s):  
Structural Transition ◽  
Metal Phase

Heterogeneity in hydrophobic deep eutectic solvents: SAXS prepeak and local environments

2021 ◽  
Vol 23 (6) ◽  
pp. 3915-3924
Author(s):  
Akshay Malik ◽  
Hemant K. Kashyap
Keyword(s):  
Structure Function ◽  
Deep Eutectic Solvents ◽  
Structural Heterogeneity ◽  
X Ray ◽  
Intermediate Range ◽  
X Ray Scattering ◽  
Local Environments ◽  
Ray Scattering

The observation of the prepeak in the simulated total X-ray scattering structure function (S(q)) reveals the presence of intermediate-range structural heterogeneity in hydrophobic deep eutectic solvents.

scholarly journals Correction: Histidine protonation controls structural heterogeneity in the cyanobacteriochrome AnPixJg2

2021 ◽  
Author(s):  
Aditya G. Rao ◽  
Christian Wiebeler ◽  
Saumik Sen ◽  
David S. Cerutti ◽  
Igor Schapiro
Keyword(s):  
Structural Heterogeneity ◽  
Chem Phys ◽  
Phys Chem Chem Phys

Correction for ‘Histidine protonation controls structural heterogeneity in the cyanobacteriochrome AnPixJg2’ by Aditya G. Rao et al., Phys. Chem. Chem. Phys., 2021, DOI: 10.1039/d0cp05314g.

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