Dynamics of cluster formation in liquid–gas phase transitions

2004 ◽  
Vol 738 ◽  
pp. 108-114
Author(s):  
M. Colonna ◽  
S. Ayik ◽  
V. Baran ◽  
Ph. Chomaz ◽  
M. Di Toro
Keyword(s):  
Phase Transitions ◽  
Gas Phase ◽  
Cluster Formation

Laser flash photolysis of benzene. II. Laser‐induced cluster formation in gas phase

1980 ◽  
Vol 73 (9) ◽  
pp. 4693-4694 ◽  
Author(s):  
Nobuaki Nakashima ◽  
Haruo Inoue ◽  
Minoru Sumitani ◽  
Keitaro Yoshihara
Keyword(s):  
Gas Phase ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Cluster Formation ◽  
Laser Flash

Theory of femtosecond coherent anti-Stokes Raman scattering spectroscopy of gas-phase transitions

2007 ◽  
Vol 127 (4) ◽  
pp. 044316 ◽  
Author(s):  
Robert P. Lucht ◽  
Paul J. Kinnius ◽  
Sukesh Roy ◽  
James R. Gord
Keyword(s):  
Phase Transitions ◽  
Raman Scattering ◽  
Gas Phase ◽  
Raman Scattering Spectroscopy ◽  
Anti Stokes

scholarly journals Liquid-gas phase transitions and CK symmetry in quantum field theories

2017 ◽  
Vol 95 (7) ◽  
Author(s):  
Hiromichi Nishimura ◽  
Michael C. Ogilvie ◽  
Kamal Pangeni
Keyword(s):  
Phase Transitions ◽  
Gas Phase ◽  
Field Theories ◽  
Quantum Field Theories ◽  
Quantum Field

Low Temperature Laser-Assisted Gas Phase Reactivity of TMGa with NH3 and Oxygen-Containing Compounds (H2O, CH3OH, O(CH3)2) in Constrained Pulsed Expansions

2002 ◽  
Vol 743 ◽  
Author(s):  
Alexander Demchuk ◽  
Michael Lynch ◽  
Steven Simpson ◽  
Brent Koplitz
Keyword(s):  
Gas Phase ◽  
Vacuum Chamber ◽  
Cluster Formation ◽  
High Vacuum ◽  
Oxygen Species ◽  
Quadrupole Mass ◽  
High Vacuum Chamber ◽  
Arf Excimer Laser ◽  
Gas Nozzle ◽  
193 Nm

ABSTRACTThe present work reports on the study of III-V gas phase reactivity in constrained gas pulse expansions of trimethylgallium (TMGa) and oxygen derivative compounds (H2O, CH3OH, O(CH3)2) with and without ammonia. The precursors are introduced separately into a high vacuum chamber via a multipulsed gas nozzle assembly. The gas mixtures are then exposed to a UV pulse from an ArF excimer laser (λ=193 nm) and the products are mass analyzed with a quadrupole mass spectrometer. The efficient laser-assisted growth of Ga-O-containing clusters in the form of [(CH3)2GaOR] x, where R is H or CH3, has been revealed. Different behavior can be seen in the reaction of TMG and the oxygen species depending on the presence of H atoms bonded to the oxygen. Significant influence of NH3 on cluster formation and oxygen incorporation is demonstrated.

scholarly journals Methane sulfonic acid enhanced formation of molecular clusters of sulfuric acid and dimethyl amine

2014 ◽  
Vol 14 (12) ◽  
pp. 18679-18701
Author(s):  
N. Bork ◽  
J. Elm ◽  
T. Olenius ◽  
H. Vehkamäki
Keyword(s):  
Sulfuric Acid ◽  
Gas Phase ◽  
Sulfonic Acid ◽  
Cluster Formation ◽  
Ab Initio Methods ◽  
Coastal Regions ◽  
Methane Sulfonic Acid ◽  
Dimethyl Amine ◽  
Order Of Magnitude ◽  
Main Growth

Abstract. Over oceans and in coastal regions methane sulfonic acid (MSA) is present in substantial concentrations in aerosols and in the gas phase. We present an investigation of the effect of MSA on sulfuric acid and dimethyl amine (DMA) based cluster formation rates. From systematic conformational scans and well tested ab initio methods, we optimize structures of all MSAx (H2SO4)yDMAz clusters where x + y ≤ 3 and z ≤ 2. The resulting thermodynamic data is used in the Atmospheric Cluster Dynamics Code and the effect of MSA is evaluated by comparing ternary MSA-H2SO4-DMA cluster formation rates to binary H2SO4-DMA cluster formation rates. Within the range of atmospherically relevant MSA concentrations, we find that MSA may increase cluster formation rates by up to one order of magnitude, although typically, the increase will be less than 300% at 258 K, less than 100% at 278 K and less than 15% at 298 K. The results are rationalized by a detailed analysis of the the main growth paths of the clusters. We find that MSA enhanced clustering involves clusters containing one MSA molecule, while clusters containing more than one MSA molecule do not contribute significantly to the growth.

scholarly journals Gas-phase computational study of tetra-n-butylammonium ion conformational mobility

2021 ◽  
Vol 340 ◽  
pp. 01045
Author(s):  
Pavel Tyapkin ◽  
Denis Rychkov
Keyword(s):  
Phase Transitions ◽  
Gas Phase ◽  
Solid Electrolytes ◽  
Computational Study ◽  
Conformational Mobility ◽  
Dft Methods ◽  
Energy Profiles

The energy profiles of various configurations of the tetra-n-butylammonium ion (Bu4N+) arising by changing the angle between a pair of butyl ligands, as well as by rotating of various alkyl fragments in gas phase, were calculated using DFT methods. A hypothesis about the most probable way of changing the conformations of tetra-n-butylammonium ions during the phase transitions in highly conductive solid electrolytes was proposed.

Studying the impact of carbon dioxide on phase transitions of gas-condensate systems and dispersion of retrograde condensate

2021 ◽  
pp. 17-22
Author(s):  
N.N. Hamidov ◽  
◽  
◽  
Keyword(s):  
Carbon Dioxide ◽  
Phase Transitions ◽  
Gas Phase ◽  
Development Process ◽  
Gas Condensate ◽  
Critical Parameters ◽  
Physico Chemical ◽  
Retrograde Condensation ◽  
Condensate System ◽  
The Impact

The paper studies the effect of carbon dioxide on the phase transitions within gas-condensate systems and defines its role on the evaporation of retrograde condensate isolated in formation due to the decreasing pressure during development process. Based on the experiments carried out by special methodology in рVT bomb, the essence of various impact of carbon dioxide amount in the content of gas-condensate mixture on the physico-chemical and thermo-dynamic parameters of the system depending on the temperature interval revealed. As a result of experiments, it was defined that the increase of carbon dioxide within gas-condensate mixture raises the content of dispersed condensate in gas phase. Moreover, the increase of CO2 in gas phase leads to the growth of gas amount dissolved in a unit volume of condensate as well. It is shown that the effect of carbon dioxide on the pressure of retrograde condensation within gas-condensate system cannot be definitely estimated. The pressure of retrograde condensation within such mixtures may be different in various temperature diapasons due to the change of the features and critical parameters of the system.

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