Reconstructed Ledges: Ice Crystal Growth without Dislocations
Abstract We give a simple explanation of recent experimental evidence that ice crystals may grow in water vapor at low supersaturation (i.e. under atmospheric conditions) without screw dislocations. Examination of the intermolecular potential shows that by assuming non-bulk-like orientations, dangli...
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Cambridge University Press (CUP)
1978
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Online Access: | http://dx.doi.org/10.1017/s0022143000033943 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000033943 |
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crcambridgeupr:10.1017/s0022143000033943 2024-03-03T08:45:57+00:00 Reconstructed Ledges: Ice Crystal Growth without Dislocations Bartley, David L. 1978 http://dx.doi.org/10.1017/s0022143000033943 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000033943 en eng Cambridge University Press (CUP) Journal of Glaciology volume 21, issue 85, page 707 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1978 crcambridgeupr https://doi.org/10.1017/s0022143000033943 2024-02-08T08:47:47Z Abstract We give a simple explanation of recent experimental evidence that ice crystals may grow in water vapor at low supersaturation (i.e. under atmospheric conditions) without screw dislocations. Examination of the intermolecular potential shows that by assuming non-bulk-like orientations, dangling molecules at surface-cluster edges may form strong hydrogen bonds with substrate molecules. This leads to a study of ice surfaces within the framework of an Ising-like model in which molecules with nearest neighbor vacancies which can provide vertical bonding are allowed two distinct states, yielding bulk-like as well as reconstructed monolayer ledges. The surface roughening transition is examined for this model by means of (i) a Monte Carlo determination of critical points and (ii) an analytical treatment of nucleation clusters. It is found that rough surfaces and, correspondingly, (dislocation-less) surface nucleation growth, prevail at temperatures below the bulk melting point over a wide range of feasible binding energies. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 21 85 707 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Bartley, David L. Reconstructed Ledges: Ice Crystal Growth without Dislocations |
topic_facet |
Earth-Surface Processes |
description |
Abstract We give a simple explanation of recent experimental evidence that ice crystals may grow in water vapor at low supersaturation (i.e. under atmospheric conditions) without screw dislocations. Examination of the intermolecular potential shows that by assuming non-bulk-like orientations, dangling molecules at surface-cluster edges may form strong hydrogen bonds with substrate molecules. This leads to a study of ice surfaces within the framework of an Ising-like model in which molecules with nearest neighbor vacancies which can provide vertical bonding are allowed two distinct states, yielding bulk-like as well as reconstructed monolayer ledges. The surface roughening transition is examined for this model by means of (i) a Monte Carlo determination of critical points and (ii) an analytical treatment of nucleation clusters. It is found that rough surfaces and, correspondingly, (dislocation-less) surface nucleation growth, prevail at temperatures below the bulk melting point over a wide range of feasible binding energies. |
format |
Article in Journal/Newspaper |
author |
Bartley, David L. |
author_facet |
Bartley, David L. |
author_sort |
Bartley, David L. |
title |
Reconstructed Ledges: Ice Crystal Growth without Dislocations |
title_short |
Reconstructed Ledges: Ice Crystal Growth without Dislocations |
title_full |
Reconstructed Ledges: Ice Crystal Growth without Dislocations |
title_fullStr |
Reconstructed Ledges: Ice Crystal Growth without Dislocations |
title_full_unstemmed |
Reconstructed Ledges: Ice Crystal Growth without Dislocations |
title_sort |
reconstructed ledges: ice crystal growth without dislocations |
publisher |
Cambridge University Press (CUP) |
publishDate |
1978 |
url |
http://dx.doi.org/10.1017/s0022143000033943 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000033943 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 21, issue 85, page 707 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000033943 |
container_title |
Journal of Glaciology |
container_volume |
21 |
container_issue |
85 |
container_start_page |
707 |
_version_ |
1792501664294371328 |