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Liquid-to-crystal nucleation: Automated lag-time apparatus to study supercooled liquids

Citation

Heneghan, AF and Wilson, PW and Wang, G and Haymet, ADJ, Liquid-to-crystal nucleation: Automated lag-time apparatus to study supercooled liquids, Journal of Chemical Physics, 115, (16) pp. 7599-7608. ISSN 0021-9606 (2001) [Refereed Article]

DOI: doi:10.1063/1.1407290

Abstract

The statistics of liquid-to-crystal nucleation are studied using an automated lag-time apparatus. A single 500 mL sample of distilled water is repeatedly supercooled to a fixed temperature below its equilibrium freezing temperature, held until freezing occurred, and then thawed. Our raw data is then a set of approximately 300 lag-times for each of three set supercooling temperatures. In each case, a small insoluble AgI crystal was added to ensure heterogeneous nucleation and average nucleation temperatures around DT58 K. The distribution of lag-times is analyzed, and shown to be well approximated by a single exponential decay, with average lag-times in the range of 1000 3000 seconds. This average lag-time decreases markedly at deeper levels of supercooling, and for the present data, this decrease is fit equally well by exponential, power law decay, and classical nucleation functional forms.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Physical Chemistry (incl. Structural)
Research Field:Physical Chemistry not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
UTAS Author:Wilson, PW (Professor Peter Wilson)
ID Code:99875
Year Published:2001
Web of Science® Times Cited:38
Deposited By:Faculty of Health
Deposited On:2015-04-15
Last Modified:2015-04-15
Downloads:0

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