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Deposition Freezing on Mineral Dust Particles: a Case Against Classical Nucleation Theory with the Assumption of a Single Contact Angle : Volume 11, Issue 7 (27/07/2011)

By Wheeler, M. J.

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Book Id: WPLBN0003991523
Format Type: PDF Article :
File Size: Pages 30
Reproduction Date: 2015

Title: Deposition Freezing on Mineral Dust Particles: a Case Against Classical Nucleation Theory with the Assumption of a Single Contact Angle : Volume 11, Issue 7 (27/07/2011)  
Author: Wheeler, M. J.
Volume: Vol. 11, Issue 7
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Wheeler, M. J., & Bertram, A. K. (2011). Deposition Freezing on Mineral Dust Particles: a Case Against Classical Nucleation Theory with the Assumption of a Single Contact Angle : Volume 11, Issue 7 (27/07/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Chemistry, University of British Columbia, Vancouver, BC CAN V6T 1Z1, Canada. Deposition freezing on two mineral species, kaolinite and illite, was studied using a flow cell coupled to an optical microscope at ∼240 K. The results show that the onset Sice (defined as the Sice conditions when ice first nucleated) is a strong function of the surface area available for nucleation, varying from 100 % to 125 %. The surface area dependent data could not be described accurately using classical nucleation theory and the assumption of a single contact angle (defined here as the single-α model). These results suggest that caution should be applied when using contact angles determined from onset Sice data and the single-Α model. In contrast to the single-Α model, the active site model, the deterministic model, and a model with a normal distribution of contact angles fit the data within experimental uncertainties. Parameters from the fits to the data are presented.

Summary
Deposition freezing on mineral dust particles: a case against classical nucleation theory with the assumption of a single contact angle

Excerpt
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