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

被引：40

作者：

Krausko, Jan ^{[1
,2
]}

Runstuk, Jiri ^{[3
]}

Nedela, Vilem ^{[3
]}

Klan, Petr ^{[1
,2
]}

Heger, Dominik ^{[1
,2
]}

机构：

[1] Masaryk Univ, Fac Sci, Dept Chem, Brno 62500, Czech Republic

[2] Masaryk Univ, Fac Sci, RECETOX, Brno 62500, Czech Republic

[3] ASCR, Vvi, Inst Sci Instruments, Brno 61264, Czech Republic

来源：

LANGMUIR | 2014年 / 30卷 / 19期

关键词：

MICROSTRUCTURAL CHARACTERIZATION; ORGANIC-MOLECULES; GRAIN-BOUNDARIES; ARTIFICIAL SNOW; NITRIC-ACID; URANYL-ION; MORPHOLOGY; CHEMISTRY; WATER; NACL;

D O I：

10.1021/la500334e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：5441 / 5447

页数：7

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