Interaction of NaF, NaCl, and NaBr with Amorphous Ice Films. Salt Dissolution and Ion Separation at the Ice Surface

2007 ◽  
Vol 111 (22) ◽  
pp. 8030-8036 ◽  
Author(s):  
Jung-Hwan Kim ◽  
Young-Kwang Kim ◽  
Heon Kang
Keyword(s):  
Ion Separation ◽  
Amorphous Ice ◽  
Ice Surface ◽  
Ice Films ◽  
Salt Dissolution

Adsorbate-induced changes in the structure of amorphous thin films of ice

2003 ◽  
Vol 81 (1-2) ◽  
pp. 167-174 ◽  
Author(s):  
P Swiderek
Keyword(s):  
Film Growth ◽  
Band System ◽  
Vibrational Modes ◽  
Amorphous Thin Films ◽  
Amorphous Ice ◽  
Ice Surface ◽  
Ice Films ◽  
Reflection Absorption Infrared Spectroscopy ◽  
Uppermost Layer ◽  
Induced Changes

The effect of adsorption of thiophene on the infrared spectra of thin amorphous ice films deposited on Pt(111) is studied using reflection-absorption infrared spectroscopy (RAIRS). The changes within the RAIR spectra in the range of the O–H-stretching band system upon adsorption depend on the structure of the ice films and the temperature at which the thiophene is deposited. Preferred binding at the ice surface to sites that are most likely identical with dangling-H groups occurs only if adsorbate mobility is sufficiently high. Otherwise, random film growth is observed, i.e., formation of multilayer islands before the first layer of thiophene on ice is completed. The adsorbate-induced changes within the O–H-stretching band system of the ice films are different for these two situations. Binding to dangling-H sites is shown to influence more than the uppermost layer of the ice, whereas random deposition has an effect only on surface vibrational modes. PACS Nos.: 68.43Fg, 62.35Ja

Experimental and simulated vibrational spectra of H2 absorbed in amorphous ice: Surface structures, energetics, and relaxations

1992 ◽  
Vol 97 (2) ◽  
pp. 753-767 ◽  
Author(s):  
Holly G. Hixson ◽  
Marek J. Wojcik ◽  
Matthew S. Devlin ◽  
J. Paul Devlin ◽  
V. Buch
Keyword(s):  
Vibrational Spectra ◽  
Surface Structures ◽  
Amorphous Ice ◽  
Ice Surface

Sticking Probability of High-Energy Methane on Crystalline, Amorphous, and Porous Amorphous Ice Films

2019 ◽  
Vol 123 (29) ◽  
pp. 17855-17863 ◽  
Author(s):  
Rebecca S. Thompson ◽  
Michelle R. Brann ◽  
S. J. Sibener
Keyword(s):  
High Energy ◽  
Sticking Probability ◽  
Amorphous Ice ◽  
Ice Films

Experimental and Theoretical Investigation of HC5N Adsorption on Amorphous Ice Surface: Simulation of the Interstellar Chemistry

2008 ◽  
Vol 112 (35) ◽  
pp. 8024-8029 ◽  
Author(s):  
Anne Coupeaud ◽  
Nathalie Piétri ◽  
Alain Allouche ◽  
Jean-Pierre Aycard ◽  
Isabelle Couturier-Tamburelli
Keyword(s):  
Theoretical Investigation ◽  
Interstellar Chemistry ◽  
Amorphous Ice ◽  
Ice Surface

scholarly journals Trapping of HCl and oxidised organic trace gases in growing ice at temperatures relevant to cirrus clouds

2019 ◽  
Vol 19 (18) ◽  
pp. 11939-11951
Author(s):  
Matthias Kippenberger ◽  
Gerhard Schuster ◽  
Jos Lelieveld ◽  
John N. Crowley
Keyword(s):  
Formic Acid ◽  
Trace Gases ◽  
Desorption Kinetics ◽  
Phase Partitioning ◽  
Ice Growth ◽  
Ice Surface ◽  
Ice Films ◽  
Order Of Magnitude ◽  
Kinetics Of ◽  
Organic Trace

Abstract. The uptake of hydrochloric acid (HCl), ethanol (C2H5OH), 1-butanol (1-C4H9OH), formic acid HC(O)OH and trifluoroacetic (CF3C(O)OH) acid to growing ice surfaces was investigated at temperatures between 194 and 228 K. HCl displayed extensive, continuous uptake during ice growth, which was strongly dependent on the ice growth velocity, the temperature of the ice surface and the gas phase concentration of HCl. Trifluoroacetic acid was also observed to be trapped in growing ice, albeit approximately an order of magnitude less efficiently than HCl, whereas the adsorption and desorption kinetics of ethanol, 1-butanol, formic acid on ice were not measurably different to those for non-growing ice, even at very high ice growth rates. We present a parameterisation of the uptake coefficient for HCl on growing ice films (γtrap) and compare the results to an existing framework that describes the non-equilibrium trapping of trace gases on ice. The trapping of HCl in growing ice crystals in the atmosphere is assessed and compared to the gas and ice phase partitioning resulting from equilibrium surface adsorption and solubility.

Annealing of amorphous ice films

1996 ◽  
Vol 208 (1-2) ◽  
pp. 151-161 ◽  
Author(s):  
J. Hessinger ◽  
R.O. Pohl
Keyword(s):  
Amorphous Ice ◽  
Ice Films

Measurement of the Adsorption Energy Difference betweenOrtho- andPara-D2on an Amorphous Ice Surface

2008 ◽  
Vol 100 (5) ◽  
Author(s):  
L. Amiaud ◽  
A. Momeni ◽  
F. Dulieu ◽  
J. H. Fillion ◽  
E. Matar ◽  
...  
Keyword(s):  
Adsorption Energy ◽  
Energy Difference ◽  
Amorphous Ice ◽  
Ice Surface

Raman scattering from amorphous ice films

1975 ◽  
Vol 32 (1) ◽  
pp. 99-102 ◽  
Author(s):  
V. Mazzacurati ◽  
M. Nardone
Keyword(s):  
Raman Scattering ◽  
Amorphous Ice ◽  
Ice Films

scholarly journals Charging of ice-vapor interfaces: applications to thunderstorms

2003 ◽  
Vol 3 (4) ◽  
pp. 1237-1252 ◽  
Author(s):  
J. Nelson ◽  
M. Baker
Keyword(s):  
Contact Region ◽  
Spatial Separation ◽  
The Other ◽  
Surface Charges ◽  
High Concentration ◽  
Ice Surface ◽  
Moving Interface ◽  
Ice Films ◽  
Electromagnetic Emissions ◽  
Ice Surfaces

Abstract. The build-up of intrinsic Bjerrum and ionic defects at ice-vapor interfaces electrically charges ice surfaces and thus gives rise to many phenomena including thermoelectricity, ferroelectric ice films, sparks from objects in blizzards, electromagnetic emissions accompanying cracking in avalanches, glaciers, and sea ice, and charge transfer during ice-ice collisions in thunderstorms. Fletcher's theory of the ice surface in equilibrium proposed that the Bjerrum defects have a higher rate of creation at the surface than in the bulk, which produces a high concentration of surface D defects that then attract a high concentration of OH- ions at the surface. Here, we add to this theory the effect of a moving interface caused by growth or sublimation. This effect can increase the amount of ionic surface charges more than 10-fold for growth rates near 1 mm s-1 and can extend the spatial separation of interior charges in qualitative agreement with many observations. In addition, ice-ice collisions should generate sufficient pressure to melt ice at the contact region and we argue that the ice particle with the initially sharper point at contact loses more mass of melt than the other particle. A simple analytic model of this process with parameters that are consistent with observations leads to predicted collisional charge exchange that semiquantitatively explains the negative charging region of thunderstorms. The model also has implications for snowflake formation, ferroelectric ice, polarization of ice in snowpacks, and chemical reactions in ice surfaces

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