Dynamics and unsteady morphologies at ice interfaces driven by D₂O-H₂O exchange.

ABSTRACT: The growth dynamics of D₂O ice in liquid H₂O in a microfluidic device were investigated between the melting points of D₂O ice (3.8 °C) and H₂O ice (0 °C). As the temperature was decreased at rates between 0.002 °C/s and 0.1 °C/s, the ice front advanced but retreated immediately upon cessation of cooling, regardless of the temperature. This is a consequence of the competition between diffusion of H₂O into the D₂O ice, which favors melting of the interface, and the driving force for growth supplied by cooling. Raman microscopy tracked H/D exchange across the solid H₂O-solid D₂O interface, with diffusion coefficients consistent with transport of intact H₂O molecules at the D₂O ice int

SUBMITTER: Drori R 

PROVIDER: S-EPMC5676873 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature