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

scholarly journals X-ray studies of the transformation from high- to low-density amorphous water

2019 ◽  
Vol 377 (2146) ◽  
pp. 20180164 ◽  
Author(s):  
Daniel Mariedahl ◽  
Fivos Perakis ◽  
Alexander Späh ◽  
Harshad Pathak ◽  
Kyung Hwan Kim ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Structural Evolution ◽  
High Energy ◽  
Real Space ◽  
High Density ◽  
Low Density ◽  
X Ray ◽  
Amorphous Ice ◽  
Density State ◽  
Amorphous States

Here we report about the structural evolution during the conversion from high-density amorphous ices at ambient pressure to the low-density state. Using high-energy X-ray diffraction, we have monitored the transformation by following in reciprocal space the structure factor S OO ( Q ) and derived in real space the pair distribution function g OO ( r ). Heating equilibrated high-density amorphous ice (eHDA) at a fast rate (4 K min –1 ), the transition to the low-density form occurs very rapidly, while domains of both high- and low-density coexist. On the other hand, the transition in the case of unannealed HDA (uHDA) and very-high-density amorphous ice is more complex and of continuous nature. The direct comparison of eHDA and uHDA indicates that the molecular structure of uHDA contains a larger amount of tetrahedral motives. The different crystallization behaviour of the derived low-density amorphous states is interpreted as emanating from increased tetrahedral coordination present in uHDA. This article is part of the theme issue ‘The physics and chemistry of ice: scaffolding across scales, from the viability of life to the formation of planets'.

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

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

Interactions of CCl4with Thin D2O Amorphous Ice Films, Part I:  A Nanoscale Probe of Ice Morphology

2000 ◽  
Vol 104 (11) ◽  
pp. 2511-2521 ◽  
Author(s):  
V. Sadtchenko ◽  
K. Knutsen ◽  
Clayton F. Giese ◽  
W. Ronald Gentry
Keyword(s):  
Amorphous Ice ◽  
Ice Films ◽  
Ice Morphology

Stepwise morphological change of porous amorphous ice films observed through adsorption of methane

2002 ◽  
Vol 116 (11) ◽  
pp. 4375-4378 ◽  
Author(s):  
Noriko Horimoto ◽  
Hiroyuki S. Kato ◽  
Maki Kawai
Keyword(s):  
Morphological Change ◽  
Amorphous Ice ◽  
Ice Films ◽  
Adsorption Of Methane

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

Photoinduced Crystallization of Amorphous Ice Films on Graphite

1998 ◽  
Vol 81 (23) ◽  
pp. 5181-5184 ◽  
Author(s):  
Dinko Chakarov ◽  
Bengt Kasemo
Keyword(s):  
Amorphous Ice ◽  
Ice Films
Sign in / Sign up

Export Citation Format

Share Document