globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1621058114
论文题名:
Dynamics and unsteady morphologies at ice interfaces driven by D2O–H2O exchange
作者: Drori R.; Holmes-Cerfon M.; Kahr B.; Kohn R.V.; Ward M.D.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2017
卷: 114, 期:44
起始页码: 11627
结束页码: 11632
语种: 英语
英文关键词: Hydrogen–deuterium exchange ; Ice growth ; Ice morphology ; Microfluidics ; Raman microscopy
Scopus关键词: deuterium oxide ; ice ; water ; Article ; cooling ; crystallization ; desorption ; deuterium hydrogen exchange ; diffusion coefficient ; force ; melting point ; melting temperature ; microfluidics ; priority journal ; Raman spectrometry ; surface property
英文摘要: The growth dynamics of D2O ice in liquid H2O in a microfluidic device were investigated between the melting points of D2O ice (3.8 °C) and H2O ice (0 °C). As the temperature was decreased at rates between 0.002 °C/s and 0.1 °C/s, the ice front advanced but retreated immediately upon cessation of cooling, regardless of the temperature. This is a consequence of the competition between diffusion of H2O into the D2O ice, which favors melting of the interface, and the driving force for growth supplied by cooling. Raman microscopy tracked H/D exchange across the solid H2O–solid D2O interface, with diffusion coefficients consistent with transport of intact H2O molecules at the D2O ice interface. At fixed temperatures below 3 °C, the D2O ice front melted continuously, but at temperatures near 0 °C a scalloped interface morphology appeared with convex and concave sections that cycled between growth and retreat. This behavior, not observed for D2O ice in contact with D2O liquid or H2O ice in contact with H2O liquid, reflects a complex set of cooperative phenomena, including H/D exchange across the solid–liquid interface, latent heat exchange, local thermal gradients, and the Gibbs–Thomson effect on the melting points of the convex and concave features. © 2017, National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163779
Appears in Collections:气候变化与战略

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作者单位: Drori, R., Department of Chemistry, New York University, New York, NY 10003, United States, Molecular Design Institute, New York University, New York, NY 10003, United States, Department of Chemistry and Biochemistry, Yeshiva University, New York, NY 10016, United States; Holmes-Cerfon, M., Courant Institute of Mathematical Sciences, New York University, New York, NY 10012, United States; Kahr, B., Department of Chemistry, New York University, New York, NY 10003, United States, Molecular Design Institute, New York University, New York, NY 10003, United States; Kohn, R.V., Courant Institute of Mathematical Sciences, New York University, New York, NY 10012, United States; Ward, M.D., Department of Chemistry, New York University, New York, NY 10003, United States, Molecular Design Institute, New York University, New York, NY 10003, United States

Recommended Citation:
Drori R.,Holmes-Cerfon M.,Kahr B.,et al. Dynamics and unsteady morphologies at ice interfaces driven by D2O–H2O exchange[J]. Proceedings of the National Academy of Sciences of the United States of America,2017-01-01,114(44)
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