scholarly journals Correction to “From NiMoO4 to γ-NiOOH: Detecting the Active Catalyst Phase by Time Resolved in Situ and Operando Raman Spectroscopy”

ACS Nano ◽  
2021 ◽  
Author(s):  
Robin N. Dürr ◽  
Pierfrancesco Maltoni ◽  
Haining Tian ◽  
Bruno Jousselme ◽  
Leif Hammarström ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Active Catalyst ◽  
Time Resolved

scholarly journals From NiMoO4 to γ-NiOOH: Detecting the Active Catalyst Phase by Time Resolved in Situ and Operando Raman Spectroscopy

ACS Nano ◽  
2021 ◽  
Author(s):  
Robin N. Dürr ◽  
Pierfrancesco Maltoni ◽  
Haining Tian ◽  
Bruno Jousselme ◽  
Leif Hammarström ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Active Catalyst ◽  
Time Resolved

Feasibility Study of Raman Spectroscopy as a Tool to Investigate the Liquid-Phase Chemistry of Aliphatic Organic Peroxides

1997 ◽  
Vol 51 (1) ◽  
pp. 74-80 ◽  
Author(s):  
Peter Jacob ◽  
Bernhard Wehling ◽  
Wieland Hill ◽  
Dieter Klockow
Keyword(s):  
Hydrogen Peroxide ◽  
Raman Spectroscopy ◽  
Liquid Phase ◽  
Chemical Processes ◽  
Organic Peroxides ◽  
Time Resolved ◽  
In Situ Investigation ◽  
Phase Chemistry ◽  
Kinetics Of

The described investigations are focused on peroxides occurring as products in atmospheric chemical processes, namely, hydrogen peroxide, methylhydroperoxide, hydroxymethylhydroperoxide, bis-(hydroxymethyl)peroxide, 1-hydroxyethylhydroperoxide, bis-(hydroxyethyl)peroxide, and hydroxymethylmethylperoxide. The compounds are identified and determined through the position and intensity of their characteristic O–O stretching bands in the range between 767 and 878 cm−1. Time-resolved Raman spectroscopy of peroxide solutions permits the in situ investigation of pathways and kinetics of reactions between peroxides and aldehydes.

scholarly journals In situ tracking of defect healing and purification of single-wall carbon nanotubes with laser radiation by time-resolved Raman spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (76) ◽  
pp. 62149-62159 ◽  
Author(s):  
N. Souza ◽  
M. Zeiger ◽  
V. Presser ◽  
F. Mücklich
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Laser Radiation ◽  
Laser Heating ◽  
Single Wall Carbon Nanotubes ◽  
Composite Processing ◽  
Time Resolved ◽  
Single Wall Carbon ◽  
Defect Healing

Fine-tuned localised laser heating of pristine or mechanically dispersed (for composite processing) SWCNTs resulting in precision healing and purification.

Development of in situ time-resolved Raman spectroscopy facility for dynamic shock loading in materials

2017 ◽  
Vol 12 (11) ◽  
pp. P11008-P11008 ◽  
Author(s):  
S. Chaurasia ◽  
V. Rastogi ◽  
U. Rao ◽  
C.D. Sijoy ◽  
V. Mishra ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Shock Loading ◽  
Time Resolved

scholarly journals Time-resolved Raman spectroscopy for in situ planetary mineralogy

2010 ◽  
Vol 49 (26) ◽  
pp. 4951 ◽  
Author(s):  
Jordana Blacksberg ◽  
George R. Rossman ◽  
Anthony Gleckler
Keyword(s):  
Raman Spectroscopy ◽  
Time Resolved

Exciton dynamics in thick GaN MOVPE epilayers deposited on sapphire.

1997 ◽  
Vol 2 ◽  
Author(s):  
J. Allègre ◽  
P. Lefebvre ◽  
J. Camassel ◽  
B. Beaumont ◽  
Pierre Gibart
Keyword(s):  
Layer Thickness ◽  
Buffer Layers ◽  
Rate Equations ◽  
Time Resolved ◽  
Versus Layer ◽  
Level Model ◽  
Shallow Impurities ◽  
Aln Buffer ◽  
Time Resolved Photoluminescence

Time-resolved photoluminescence spectra have been recorded on three GaN epitaxial layers of thickness 2.5 μm, 7 μm and 16 μm, at various temperatures ranging from 8K to 300K. The layers were deposited by MOVPE on (0001) sapphire substrates with standard AlN buffer layers. To achieve good homogeneities, the growth was in-situ monitored by laser reflectometry. All GaN layers showed sharp excitonic peaks in cw PL and three excitonic contributions were seen by reflectivity. The recombination dynamics of excitons depends strongly upon the layer thickness. For the thinnest layer, exponential decays with τ ~ 35 ps have been measured for both XA and XB free excitons. For the thickest layer, the decay becomes biexponential with τ1 ~ 80 ps and τ2 ~ 250 ps. These values are preserved up to room temperature. By solving coupled rate equations in a four-level model, this evolution is interpreted in terms of the reduction of density of both shallow impurities and deep traps, versus layer thickness, roughly following a L−1 law.

Sign in / Sign up

Export Citation Format

Share Document