Cavity-enhanced Raman spectroscopy with optical feedback cw diode lasers for gas phase analysis and spectroscopy

The Analyst ◽  
2012 ◽  
Vol 137 (20) ◽  
pp. 4669 ◽  
Author(s):  
Robert Salter ◽  
Johnny Chu ◽  
Michael Hippler
Keyword(s):  
Raman Spectroscopy ◽  
Gas Phase ◽  
Phase Analysis ◽  
Optical Feedback ◽  
Diode Lasers

Shaping up operando spectroscopy: Raman characterization of a working honeycomb monolith

2015 ◽  
Vol 5 (11) ◽  
pp. 4942-4945 ◽  
Author(s):  
S. B. Rasmussen ◽  
R. López-Medina ◽  
R. Portela ◽  
E. Mikolajska ◽  
M. Daturi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Gas Phase ◽  
Phase Analysis ◽  
Operando Spectroscopy ◽  
Structure Activity Relationships ◽  
Structure Activity ◽  
Reactor Cell ◽  
Honeycomb Monolith ◽  
Raman Characterization

An operando reactor cell for honeycombs to study the effect of conformation on structure–activity relationships by surface Raman spectroscopy and gas-phase analysis.

Chemisorption of ethylene on nickel surfaces with preadsorbed oxygen

1981 ◽  
Vol 46 (2) ◽  
pp. 340-353
Author(s):  
Pavel Zachař ◽  
Zdeněk Bastl ◽  
Jakub Adámek
Keyword(s):  
Gas Phase ◽  
Phase Analysis ◽  
Oxygen Concentration ◽  
Electrical Resistance ◽  
High Vacuum ◽  
Volumetric Method ◽  
Surface Oxygen ◽  
Oxygen Chemisorption ◽  
Thin Polycrystalline ◽  
Total Adsorption

Chemisorption of ethylene was studied on thin polycrystalline layers of nickel prepared by metal deposition in high vacuum and modified by preadsorbed oxygen. The volumetric method combined with the gas-phase analysis and the measurement of the electrical resistance changes of these layers were used. Already small amounts of preadsorbed oxygen of the order of 10-2 of the monolayer affect rather substantially the extent of ethylene chemisorption. The extent of the initial irreversible chemisorption and also the total adsorption of ethylene as a function of the amount of preadsorbed oxygen have a maximum at the surface oxygen concentration of 3 . 1013 molecule cm-2. The adsorption accompanied by the extensive dissociation of ethylene C-H bonds proceeds predominantly on nickel atoms with lower coordination (atoms on the microcrystal edges, corner atoms, etc.), where also oxygen chemisorption proceeds preferentially.

Square-wave self-modulation in diode lasers with polarization-rotated optical feedback

2006 ◽  
Vol 31 (13) ◽  
pp. 2006 ◽  
Author(s):  
Athanasios Gavrielides ◽  
Thomas Erneux ◽  
David W. Sukow ◽  
Guinevere Burner ◽  
Taylor McLachlan ◽  
...  
Keyword(s):  
Optical Feedback ◽  
Diode Lasers ◽  
Square Wave

Four-wave mixing of picosecond pulses in hollow fibers: expanding the possibilities of gas-phase analysis

2001 ◽  
Vol 72 (5) ◽  
pp. 575-582 ◽  
Author(s):  
A.B. Fedotov ◽  
F. Giammanco ◽  
A.N. Naumov ◽  
P. Marsili ◽  
A. Ruffini ◽  
...  
Keyword(s):  
Gas Phase ◽  
Phase Analysis ◽  
Four Wave Mixing ◽  
Hollow Fibers ◽  
Wave Mixing ◽  
Picosecond Pulses
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