Campbell, JM, Meldrum, FC and Christenson, HK (2015) Is ice nucleation from supercooled water insensitive to surface roughness? Journal of Physical Chemistry C, 119 (2). 1164 - 1169. ISSN 1932-7447
Abstract
There is much evidence that nucleation of liquid droplets from vapor as well as nucleation of crystals from both solution and vapor occurs preferentially in surface defects such as pits and grooves. In the case of nucleation of solid from liquid (freezing) the situation is much less clear-cut. We have therefore carried out a study of the freezing of 50 μm diameter water drops on silicon, glass, and mica substrates and made quantitative comparisons for smooth substrates and those roughened by scratching with three diamond powders of different size distributions. In all cases, freezing occurred close to the expected homogeneous freezing temperature, and the nucleation rates were within the range of literature data. Surface roughening had no experimentally significant effect on any of the substrates studied. In particular, surface roughening of mica - which has been shown to cause dramatic differences in crystal nucleation from organic vapors - has an insignificant eff ect on ice nucleation from supercooled water. The results also show that glass, silicon, and mica have at best only a marginal ice-nucleating capability which does not di ffer appreciably between the substrates. The lack of effect of roughness on freezing can be rationalized in terms of the relative magnitudes of interfacial free energies and the lack of a viable two-step mechanism, which allows vapor nucleation to proceed via a liquid intermediate.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, copyright © American Chemical Society 2015 after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jp5113729 |
Keywords: | Ice nucleation; freezing; heterogeneous nucleation; topography |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Mar 2015 12:28 |
Last Modified: | 30 Jun 2020 14:49 |
Published Version: | http://dx.doi.org/10.1021/jp5113729 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/jp5113729 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:83541 |