Observation of a Brine Layer on an Ice Surface with an Environmental Scanning Electron Microscope at Higher Pressures and Temperatures

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Authors

KRAUSKO Ján RUNŠTUK Jiří NEDĚLA Vilém KLÁN Petr HEGER Dominik

Year of publication 2014
Type Article in Periodical
Magazine / Source Langmuir
MU Faculty or unit

Faculty of Science

Citation
Web http://pubs.acs.org/doi/abs/10.1021/la500334e
Doi http://dx.doi.org/10.1021/la500334e
Field Organic chemistry
Keywords Ice; Microscope; ESET; Impurities
Description Observation of a uranyl-salt brine layer on an ice surface using backscattered electron detection and ice surface morphology using secondary-electron detection under equilibrium conditions was facilitated using an environmental scanning electron microscope (ESEM) at temperatures above 250 K and pressures of hundreds of Pa. The micrographs of a brine layer over ice grains prepared by either slow or shock freezing provided a complementary picture of the contaminated ice grain boundaries. Fluorescence spectroscopy of the uranyl ions in the brine layer confirmed that the species exists predominately in the solvated state under experimental conditions of ESEM.
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