TITLE

Structure and dynamics of ice Ih films upon HCl adsorption between 190 and 270 K. I. Neutron diffraction and quasielastic neutron scattering experiments

AUTHOR(S)
Demirdjian, B.; Ferry, D.; Suzanne, J.; Toubin, C.; Picaud, S.; Hoang, P. N. M.; Girardet, C.
PUB. DATE
March 2002
SOURCE
Journal of Chemical Physics;3/22/2002, Vol. 116 Issue 12, p5143
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Neutron diffraction and quasielastic neutron experiments are performed to investigate the effect of HC1 adsorption on the structure and dynamics of an ultra-thin ice Ih film (5 H[sub 2]O bilayers thick) deposited on a crystalline MgO(001) substrate. Three HC1 coverages have been studied 0.3, 0.6, and 1 monolayer (ML) in the temperature range 190-270 K. At 0.3 and 0.6 HC1 monolayer, no mobility is measured at T≥220 K. A translational mobility, which is a signature of a liquid phase, is observed at T= 250 K. This phase occurs 15 K below the surface melting temperature of the bare ice film. The fraction of mobile molecules represents 30% (0.3 ML HC1) and 45% (0.6 ML HC1) of the film. At 1 HC1 monolayer and T= 220 K, HCl-dihydrate coexists with ice Ih, whereas at T= 250 K the ice film becomes amorphous and only 9% of the film is mobile. The results are discussed within the context of atmospheric chemistry.
ACCESSION #
6327613

 

Related Articles

  • Two Holes Better Than One.  // Scholastic News -- Edition 4;10/25/2002, Vol. 65 Issue 7, p2 

    Reports on a noted shrinking of the hole at the earth's ozone layer as of September 24, 2002. Significance of the ozone layer to the earth; Size of the shrunken hole; Factors attributed to the shrinking of the hole.

  • Cooling of the Arctic and Antarctic Polar Stratospheres due to Ozone Depletion. Randel, William J.; Fei Wu // Journal of Climate;5/1/99, Vol. 12 Issue 5, p1467 

    Long time records of stratospheric temperatures indicate that substantial cooling has occurred during spring over polar regions of both hemispheres. These cooling patterns are coincident with observed recent ozone depletions. Time series of temperature from radiosonde, satellite, and National...

  • Evolution of stratospheric ozone during winter 2002/2003 as observed by a ground-based millimetre wave radiometer at Kiruna, Sweden. Raffalski, U.; Hochschild, G.; Kopp, G.; Urban, J. // Atmospheric Chemistry & Physics Discussions;2005, Vol. 5 Issue 1, p131 

    We present ozone measurements of the millimetre wave radiometer installed at the Swedish Institute of Space Physics (Institutet för rymdfysik, IRF) in Kiruna (67.8°N, 20.4°E, 420m a.s.l.). Nearly continuous operation in the winter of 2002/2003 allow us to give an overview of ozone...

  • Unprecedented Arctic ozone loss occurred last winter.  // Biomedical Market Newsletter;10/10/2011, Vol. 21, p277 

    The article reports on the unprecedented depletion of the protective ozone layer of the Earth above the Arctic last winter, which is caused by a prolonged period of low temperatures in the stratosphere, according to a study led by the U.S. National Aeronautics & Space Administration (NASA).

  • The Continuity Equation for the Stratospheric Aerosol and Its Characteristic Curves. Li, J.; Boer, G. J. // Journal of the Atmospheric Sciences;2/1/2000, Vol. 57 Issue 3, p442 

    Introduces a four-dimensional continuity equation for particles undergoing growth process in the atmosphere. Theoretical works explaining production and depletion of stratospheric aerosols; Factors that determine aerosol size distribution for different radius ranges; Methodology of the study;...

  • Volcanic dust threatens the ozone layer. Gribbin, John // New Scientist;9/7/91, Vol. 131 Issue 1785, p27 

    Reports on research focus on how volcanic eruptions affect the ozone layer in the wake of Mount Pinatubo's eruption in the Philippines. Calculations based on the discovery that ozone depletion over Antarctica involves reactions on the surface of tiny ice particles in the stratospheric clouds;...

  • Midlatitude CIO during the maximum atmospheric chlorine burden: in situ balloon measurements and model simulations. Vogel, B.; Müller, R.; Engel, A.; Grooß, J.-U.; Toohey, D.; Woyke, T.; Stroh, F. // Advances in Geosciences;2005, Vol. 5, p875 

    Chlorine monoxide (ClO) plays a key role in stratospheric ozone loss processes at midlatitudes. We present two balloonborne in situ measurements of ClO conducted in northern hemisphere midlatitudes during the period of the maximum of total inorganic chlorine loading in the atmosphere. Both ClO...

  • Ozone profile retrieval from limb scatter measurements in the HARTLEY bands: further retrieval details and profile comparisons. Rohen, G. J.; Savigny, C. v.; Kaiser, J. W.; Llewellyn, E. J.; Froidevaux, L.; M. López-Puertas; Steck, T.; Palm, M.; Winkler, H.; Sinnhuber, M.; Bovensmann, H.; Burrows, J. P. // Atmospheric Chemistry & Physics;2008, Vol. 8 Issue 9, p2509 

    SCIAMACHY limb scatter radiance measurements at selected wavelengths in the HARTLEY bands have been used to retrieve ozone profiles in the upper stratosphere and lower mesosphere. Comparisons with profiles measured by a ground based radiometer in Norway, MIPAS on board ENVISAT, HALOE on UARS and...

  • Long-term lidar observations of polar stratospheric clouds at Esrange in northern Sweden. Blum, U.; Fricke, K. H.; Müller, K. P.; Siebert, J.; Baumgarten, G. // Tellus: Series B;Nov2005, Vol. 57 Issue 5, p412 

    Polar stratospheric clouds (PSCs) play a key role in the depletion of polar ozone. The type of cloud and the length of time for which it exists are crucial for the amount of chlorine activation during the polar night. The Bonn University backscatter lidar at Esrange in northern Sweden (68°N,...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics