File(s) not publicly available
Liquid-to-crystal nucleation: Automated lag-time apparatus to study supercooled liquids
journal contributionposted on 2023-05-18, 09:16 authored by Heneghan, AF, Peter Wilson, Wang, G, Haymet, ADJ
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.
Publication titleJournal of Chemical Physics
Department/SchoolCollege Office - College of Health and Medicine
PublisherAmer Inst Physics
Place of publicationCirculation & Fulfillment Div, 2 Huntington Quadrangle, Ste 1 N O 1, Melville, USA, Ny, 11747-4501