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High-speed imaging of ice nucleation in water proves the existence of active sites

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Holden, Mark A., Whale, Thomas F., Tarn, Mark D., O’Sullivan, Daniel, Walshaw, Richard D., Murray, Benjamin J., Meldrum, Fiona C. and Christenson, Hugo K. (2019) High-speed imaging of ice nucleation in water proves the existence of active sites. Science Advances, 5 (2). eaav4316. doi:10.1126/sciadv.aav4316

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Official URL: http://dx.doi.org/10.1126/sciadv.aav4316

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Abstract

Understanding how surfaces direct nucleation is a complex problem that limits our ability to predict and control crystal formation. We here address this challenge using high-speed imaging to identify and quantify the sites at which ice nucleates in water droplets on the two natural cleavage faces of macroscopic feldspar substrates. Our data show that ice nucleation only occurs at a few locations, all of which are associated with micron-size surface pits. Similar behavior is observed on α-quartz substrates that lack cleavage planes. These results demonstrate that substrate heterogeneities are the salient factor in promoting nucleation and therefore prove the existence of active sites. We also provide strong evidence that the activity of these sites derives from a combination of surface chemistry and nanoscale topography. Our results have implications for the nucleation of many materials and suggest new strategies for promoting or inhibiting nucleation across a wide range of applications.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science > Chemistry
Library of Congress Subject Headings (LCSH): Nucleation, Atmospheric nucleation, Feldspar, Ice crystals -- Growth, Surface chemistry
Journal or Publication Title: Science Advances
Publisher: American Association for the Advancement of Science
ISSN: 2375-2548
Official Date: 1 February 2019
Dates:
DateEvent
1 February 2019Published
17 December 2018Accepted
Date of first compliant deposit: 31 October 2019
Volume: 5
Number: 2
Article Number: eaav4316
DOI: 10.1126/sciadv.aav4316
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/M003027/1 [EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/N002423/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
RPG-2014-306Leverhulme Trusthttp://dx.doi.org/10.13039/501100000275
713664 CryoProtectEuropean Research Councilhttp://dx.doi.org/10.13039/501100000781
648661 MarinelceEuropean Research Councilhttp://dx.doi.org/10.13039/501100000781
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