Five-dimensional imaging of freezing emulsions with solute effects

International audience The interaction of objects with a moving solidification front is a common feature of many industrial and natural processes such as metal processing, the growth of single-crystals, the cryopreservation of cells, or the formation of sea ice. Solidification fronts interact with o...

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Bibliographic Details
Published in:Science
Main Authors: Dedovets, Dmytro, Monteux, Cécile, Deville, Sylvain
Other Authors: Laboratoire de Synthèse et Fonctionnalisation de Céramiques (LSFC), SAINT-GOBAIN-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Sciences et Ingénierie de la Matière Molle (UMR 7615) (SIMM), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2018
Subjects:
[CHIM.MATE]Chemical Sciences/Material chemistry
[SPI.MAT]Engineering Sciences [physics]/Materials
Sea ice
Online Access:https://hal.science/hal-01794931
https://hal.science/hal-01794931/document
https://hal.science/hal-01794931/file/scifile.pdf
https://doi.org/10.1126/science.aar4503
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Summary:International audience The interaction of objects with a moving solidification front is a common feature of many industrial and natural processes such as metal processing, the growth of single-crystals, the cryopreservation of cells, or the formation of sea ice. Solidification fronts interact with objects with different outcomes, from the total rejection to their complete engulfment. We image the freezing of emulsions in 5D (space, time, and solute concentration) with confocal mi-croscopy. We show the solute induces long-range interactions that determine the solidification microstructure. The local increase of solute concentration enhances premelting, which controls the engulfment of droplets by the front and the evolution of grain boundaries. Freezing emulsions may be a good analogue of many solidification systems where objects interact with a solidification interface. Solidification fronts interact with hard or soft objects such as particles, bubbles, droplets, or cells, in three different ways: objects can be engulfed, rejected for some time and then encapsulated , or rejected for an extended period of time (1). Different outcomes are desired, depending 1

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