Quantum-state-resolved studies on UV-laser-induced desorption of small molecules from single crystal oxide surfaces

1995 ◽  
Author(s):  
Ingrid Beauport ◽  
Katharina H. Al-Shamery
Keyword(s):  
Single Crystal ◽  
Small Molecules ◽  
Quantum State ◽  
Oxide Surfaces ◽  
Uv Laser ◽  
Quantum State Resolved

UV laser-induced desorption of CO from Cr2O3(111). A fully quantum state resolved mapping of the desorbing species

1994 ◽  
Vol 222 (1-2) ◽  
pp. 107-112 ◽  
Author(s):  
K. Al-Shamery ◽  
I. Beauport ◽  
H.-J. Freund ◽  
H. Zacharias
Keyword(s):  
Quantum State ◽  
Uv Laser ◽  
Quantum State Resolved

A Novel Technique for Growth of Lithium-free ZnO Single Crystals

2013 ◽  
Vol 1538 ◽  
pp. 405-410
Author(s):  
Shaoping Wang ◽  
Aneta Kopec ◽  
Andrew G. Timmerman
Keyword(s):  
Single Crystal ◽  
The Novel ◽  
Uv Laser ◽  
Uv Detectors ◽  
Growth Technique ◽  
Light Emitting ◽  
Alkaline Metals ◽  
Novel Technique ◽  
Solar Blind ◽  
Zno Single Crystal

ABSTRACTA ZnO single crystal is a native substrate for epitaxial growth of high-quality thin films of ZnO-based Group II-oxides (e.g. ZnO, ZnMgO, ZnCdO) for variety of devices, such as UV and visible-light emitting diodes (LEDs), UV laser diodes and solar-blind UV detectors. Currently, commercially available ZnO single crystal wafers are produced using a hydrothermal technique. The main drawback of hydrothermal growth technique is that the ZnO crystals contain large amounts of alkaline metals, such as Li and K. These alkaline metals are electrically active and hence can be detrimental to device performances. In this paper, results from a recently developed novel growth technique for ZnO single crystal boules are presented. Lithium-free ZnO single crystal boules of up to 1 inch in diameter was demonstrated using the novel technique. Results from crystal growth and materials characterization will be discussed.

QUANTUM CHEMISTRY OF OXIDE SURFACES: FROM CO CHEMISORPTION TO THE IDENTIFICATION OF THE STRUCTURE AND NATURE OF POINT DEFECTS ON MgO

2000 ◽  
Vol 07 (03) ◽  
pp. 277-306 ◽  
Author(s):  
GIANFRANCO PACCHIONI
Keyword(s):  
Single Crystal ◽  
Oxide Surfaces ◽  
Comparison Of Experiments ◽  
Powder Samples ◽  
Adsorption Of Co ◽  
Single Oxygen ◽  
Critical Overview ◽  
Mgo Surface ◽  
Experimental And Theoretical Studies

The electronic structure and chemisorption properties of the surface of ionic crystals are reviewed, with emphasis on two topics: a critical overview of the experimental and theoretical studies of the adsorption of CO on single crystal and polycrystalline MgO, and a discussion on the most important defect centers at the MgO surface — low-coordinated sites, single oxygen and magnesium vacancies, divacancies, and impurity or substitutional atoms. The two subjects are to some extent interconnected. From the detailed theoretical and experimental study of the adsorption of a nonreactive molecule like CO and from the comparison of experiments done on single crystal or thin films and on powder samples, one can learn about the nature and concentration of the defects at the surface. A more precise characterization of defects requires, however, a careful spectroscopic investigation and a direct comparison with quantum-chemical calculations of both geometric structure and observable properties. The combined theoretical–experimental approach offers new opportunities for a better understanding of the complexity of oxide surfaces.

Quantum-state resolved reaction dynamics at the gas-liquid interface: Direct absorption detection of HF(v,J) product from F(P2)+Squalane

2006 ◽  
Vol 125 (2) ◽  
pp. 021101 ◽  
Author(s):  
Alexander M. Zolot ◽  
Warren W. Harper ◽  
Bradford G. Perkins ◽  
Paul J. Dagdigian ◽  
David J. Nesbitt
Keyword(s):  
Quantum State ◽  
Reaction Dynamics ◽  
Liquid Interface ◽  
Direct Absorption ◽  
Quantum State Resolved
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