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Heterogeneous nucleation of supercooled water, and the effect of an added catalyst

Authors
Publisher
The National Academy of Sciences
Publication Date
Source
PMC
Keywords
  • Physical Sciences
Disciplines
  • Biology
  • Chemistry
  • Engineering

Abstract

The statistics of liquid-to-crystal nucleation are measured rigorously by using a recently developed automated lag-time apparatus (ALTA). A single sample, in this case a sample of pure water both with and without an (insoluble) AgI crystal, is repeatedly cooled, nucleated, and thawed. Analysis of the data, coupled with a second kind of experiment, shows that the statistics of nucleation are consistent with a first-order kinetic mechanism over a wide range of supercooling temperatures. The limitations of classical nucleation theory are exhibited. Our analysis unifies many related experiments in biology, physics, chemistry, and chemical engineering.

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