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Radiolysis-Induced Crystallization of Sodium Chloride in Acetone by Electron Beam Irradiation

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Title: Radiolysis-Induced Crystallization of Sodium Chloride in Acetone by Electron Beam Irradiation
Authors: Yamazaki, Tomoya Browse this author
Kimura, Yuki Browse this author
Keywords: acetone
in situ observation
liquid cell transmission electron microscopy
sodium chlorate
sodium chloride
Issue Date: 21-May-2021
Publisher: Cambridge University Press
Journal Title: Microscopy and microanalysis
Volume: 27
Issue: 3
Start Page: 459
End Page: 465
Publisher DOI: 10.1017/S1431927621000179
Abstract: In situ liquid cell transmission electron microscopy (LC-TEM) is an innovative method for studying the processes involved in the formation of crystals in liquids. However, it is difficult to capture early stages of crystallization because of the small field of view and the unfavorable changes in sample composition resulting from electron-beam radiolysis. Nevertheless, if the radiolysis required to induce the crystallization of a sample could be controlled in LC-TEM, this would be advantageous for observing the crystallization process. Here, we examined this possibility by using a mixture of sodium chlorate (NaClO3) and acetone in the LC-TEM. The electron beam induced the formation of dendritic crystals in a saturated acetone solution of NaClO3; moreover, these crystals consisted of sodium chloride (NaCl), rather than NaClO3, suggesting that chloride ions (Cl-), which were not present in the initial solution, were generated by radiolysis of chlorate ions . As a result, the solution then supersaturated with NaCl because its solubility in acetone is much lower than that of NaClO3. The combination of radiolysis and a solvent in which a solute is much less soluble is potentially useful for establishing crystallization conditions for materials that are difficult to crystallize directly in LC-TEM experiments.
Rights: This article has been published in a revised form in Microscopy and Microanalysis This version is published under a Creative Commons CC-BY-NC-ND. No commercial re-distribution or re-use allowed. Derivative works cannot be distributed. © The Author(s), 2021. Published by Cambridge University Press on behalf of the Microscopy Society of America .
Type: article (author version)
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 木村 勇気

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