In-situ kinetics study of gas phase formation in the system Ga/In-AsCl 3 -HCl-H 2 by UV spectroscopy

2001 ◽  
Author(s):  
Valery A. Voronin ◽  
Sergey K. Guba ◽  
Marina A. Litvin ◽  
A. Y. Kulikov
Keyword(s):  
Gas Phase ◽  
Phase Formation ◽  
Uv Spectroscopy ◽  
Kinetics Study

scholarly journals A Study of CVD of Gallium Nitride Films by In Situ Gas-Phase UV Spectroscopy

1995 ◽  
Vol 05 (C5) ◽  
pp. C5-183-C5-190 ◽  
Author(s):  
S. E. Alexandrov ◽  
A. Y. Kovalgin ◽  
D. M. Krasovitskiy
Keyword(s):  
Gallium Nitride ◽  
Gas Phase ◽  
Uv Spectroscopy

MOCVD Precursor Delivery Monitored and Controlled Using UV Spectroscopy

1997 ◽  
Vol 474 ◽  
Author(s):  
Brian J. Rappoli ◽  
William J. DeSisto ◽  
Tobin J. Marks ◽  
John A. Belot
Keyword(s):  
Thin Films ◽  
Gas Phase ◽  
Uv Spectroscopy ◽  
Mixed Metal Oxide ◽  
Feedback Control System ◽  
Metal Oxide Films ◽  
Mocvd Growth ◽  
Mocvd Precursor ◽  
Htsc Thin Films

ABSTRACTThe glyme adducts of bis(1,1,1,5,5,5-hexafluoro-2,4-pentanedionate)barium, Ba(hfac)2•glyme, are frequently employed as precursors in the MOCVD fabrication of HTSC thin films. The physical properties of these precursors can be modified by changing the glyme ligand in the barium complex. In this study, gas phase concentrations of two barium complexes as a function of purge time and bubbler temperature have been examined by in-situ UV spectroscopy. Also presented are the details of a UV spectrophotometric-based feedback control system designed to maintain constant gas phase concentration of 2,2,6,6-tetramethyl-3,5-heptadionate (thd) precursors, Cu(thd)2 and Y(thd)3, during MOCVD growth of mixed metal oxide films.

Mechanism and Direct Kinetics Study on the Homogeneous Gas-Phase Formation of PBDD/Fs from 2-BP, 2,4-DBP, and 2,4,6-TBP as Precursors

2011 ◽  
Vol 45 (5) ◽  
pp. 1917-1925 ◽  
Author(s):  
Wanni Yu ◽  
Jingtian Hu ◽  
Fei Xu ◽  
Xiaoyan Sun ◽  
Rui Gao ◽  
...  
Keyword(s):  
Gas Phase ◽  
Phase Formation ◽  
Kinetics Study

scholarly journals The homogeneous gas-phase formation mechanisms of PCPTs/PCDTs/PCDFs from the radical/radical cross-condensation of 2-CPR and 2-CTPR: a theoretical, mechanistic and kinetics study

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12626-12640
Author(s):  
Ying Li ◽  
Yanan Han ◽  
Zhuochao Teng ◽  
Xianwei Zhao ◽  
Yanhui Sun ◽  
...  
Keyword(s):  
Gas Phase ◽  
Phase Formation ◽  
Formation Mechanisms ◽  
Kinetics Study

Homogeneous gas-phase formation mechanisms of PCPT/DT/DFs from the radical/radical cross-condensation of 2-CPR and 2-CTPR are proposed.

scholarly journals Interstellar dimethyl ether gas-phase formation: a quantum chemistry and kinetics study

2018 ◽  
Vol 482 (3) ◽  
pp. 3567-3575 ◽  
Author(s):  
Dimitrios Skouteris ◽  
Nadia Balucani ◽  
Cecilia Ceccarelli ◽  
Noelia Faginas Lago ◽  
Claudio Codella ◽  
...  
Keyword(s):  
Quantum Chemistry ◽  
Gas Phase ◽  
Dimethyl Ether ◽  
Phase Formation ◽  
Kinetics Study

MOCVD HTSC Precursor Delivery Monitored By UV Spectroscopy

1995 ◽  
Vol 415 ◽  
Author(s):  
Brian J. Rappoli ◽  
William J. DeSisto
Keyword(s):  
Gas Phase ◽  
Uv Spectroscopy ◽  
Diagnostic Technique ◽  
Chemical Vapor ◽  
Test System ◽  
Small Scale ◽  
Mocvd Reactor ◽  
Phase Concentration ◽  
Scale Test

ABSTRACTUV spectroscopy has been used as an in situ diagnostic to measure the gas phase concentration of 2,2,6,6-tetramethyl-3,5-heptanedionate (thd) complexes of Ba, Cu and Y in metalorganic chemical vapor deposition (MOCVD) bubbler effluent. These precursors for MOCVD synthesis of YBa2Cu37−δ (YBCO) show marked instability in gas phase concentration as a function of time during bubbler purge. The UV diagnostic technique has been applied to both a small scale test system and a commercial scale MOCVD reactor.

On the trustability of semi-empirical methods to the calculation of gas phase formation enthalpies of inorganic compounds containing heavy metals: tin borates

2017 ◽  
Author(s):  
Robson de Farias
Keyword(s):  
Heavy Metals ◽  
Gas Phase ◽  
Phase Formation ◽  
Inorganic Compounds ◽  
Formation Enthalpy ◽  
Computational Time ◽  
Gas Formation ◽  
Formation Enthalpies ◽  
Knudsen Effusion Mass Spectrometry ◽  
Semi Empirical

<p>In the present work, are calculated the gas formation enthalpies (SE; PM3 and PM6) for tin borates: SnB<sub>2</sub>O<sub>4</sub><sup> </sup>and Sn<sub>2</sub>B<sub>2</sub>O<sub>5</sub>. The calculated values are compared with experimental ones, obtained by Knudsen effusion mass spectrometry [3]. It is shown that SE methods, besides their lower computational time consuming can, indeed, provide reliable gas phase formation enthalpy values for inorganic compounds containing heavy metals.</p>

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