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

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• 作者：J谩n Krausko ; Ji艡铆 Run拧tuk ; Vil茅m Ned臎la ; Petr Kl谩n ; Dominik Heger
• 刊名：Langmuir
• 出版年：2014
• 出版时间：May 20, 2014
• 年：2014
• 卷：30
• 期：19
• 页码：5441-5447
• 全文大小：413K
• 年卷期：v.30,no.19(May 20, 2014)
• ISSN：1520-5827

文摘

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.