Water adsorption on (111) surfaces of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">BaF</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CaF</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Zink, J. C.; Reif, J.; Matthias, E.

doi:10.1103/physrevlett.68.3595

Cited by 39 publications

(9 citation statements)

References 14 publications

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“…Rieder et al showed that on perfect CaF 2 (1 1 1) surfaces no adsorption of water takes place at room temperature [9]. However, this adsorption behaviour completely changes when defects are present which have been created either mechanically [18] or via irradiation with electrons of a kinetic energy above 100 eV [19]. The latter causes the creation of colour centers in CaF 2 which leads to the chemisorption of water via a dissociative adsorption by filling the former fluorine sites with OH À [20].…”

Section: Ambient Conditionsmentioning

confidence: 97%

Enhanced susceptibility of CaF2(111) to adsorption due to ion irradiation

Akcöltekin

Roll

Akcöltekin

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Ambient Conditionsmentioning

confidence: 97%

Enhanced susceptibility of CaF2(111) to adsorption due to ion irradiation

Akcöltekin

Roll

Akcöltekin

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

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“…Thus, an epitaxial layer of ice growth is expected to form on BaF 2 (111) at ambient conditions. Although earlier optical absorption experiments suggested the formation of ice-like overlayers under low temperature18 and ambient conditions19, theoretical estimates of the stability of the epitaxial ice layers are not consistent with these experimental observations20. Also in nano-confinement Raman scattering experiments on water have found a non-freezing water layer at the water/solid interface down to extremely low temperatures21.…”

mentioning

confidence: 96%

Highly Compressed Two-Dimensional Form of Water at Ambient Conditions

Kaya

Schlesinger

Yamamoto

et al. 2013

Sci Rep

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The structure of thin-film water on a BaF2(111) surface under ambient conditions was studied using x-ray absorption spectroscopy from ambient to supercooled temperatures at relative humidity up to 95%. No hexagonal ice-like structure was observed in spite of the expected templating effect of the lattice-matched (111) surface. The oxygen K-edge x-ray absorption spectrum of liquid thin-film water on BaF2 exhibits, at all temperatures, a strong resemblance to that of high-density phases for which the observed spectroscopic features correlate linearly with the density. Surprisingly, the highly compressed, high-density thin-film liquid water is found to be stable from ambient (300 K) to supercooled (259 K) temperatures, although a lower-density liquid would be expected at supercooled conditions. Molecular dynamics simulations indicate that the first layer water on BaF2(111) is indeed in a unique local structure that resembles high-density water, with a strongly collapsed second coordination shell.

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“…By means of optical secondharmonic generation Zink et al 10 found hints for a pseudomorphous epitaxial growth of water on BaF 2 ͑111͒ under ultrahigh vacuum conditions even at room temperature. Sadtchenko et al 11 recently reported infrared spectra from two-dimensional ͑2D͒ and three-dimensional ͑3D͒ water on BaF 2 ͑111͒ surfaces under ambient conditions.…”

Section: Introductionmentioning

confidence: 99%

Helium atom scattering study of the interaction of water with the BaF2(111) surface

Vogt

2007

The Journal of Chemical Physics

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The interaction of water with the BaF2(111) single crystal surface is investigated using the helium atom scattering technique. It is found that H2O forms a long-range ordered two-dimensional (2D) phase with (1 x 1) translational symmetry already after an exposure of 3 L (1 L=10(-6) Torr s) at temperatures below 150 K. The activation energy for desorption of the saturated 2D phase, which is assigned to a bilayer, is estimated to be 46+/-2 kJ mol(-1), corresponding to a desorption temperature of 165 K. The desorption of multilayers was observed at 150 K, consistent with a binding energy of 42+/-2 kJ mol(-1). Before completion and after desorption of the saturated 2D phase, a superstructure consistent with a disordered (square root of 3 x square root of 3)R30 degrees lattice has been observed, which is attributed to the first layer of water with a coverage of one molecule per surface unit cell, in accordance with recent theoretical studies. Desorption of this phase is observed at temperatures above 200 K, consistent with an unexpectedly strong bonding of the molecules to the substrate.

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Water adsorption on (111) surfaces ofBaF2andCaF2

Cited by 39 publications

References 14 publications

Enhanced susceptibility of CaF2(111) to adsorption due to ion irradiation

Enhanced susceptibility of CaF2(111) to adsorption due to ion irradiation

Highly Compressed Two-Dimensional Form of Water at Ambient Conditions

Helium atom scattering study of the interaction of water with the BaF2(111) surface

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