气候变化领域集成服务门户(CCPortal): Single-crystal Ih ice surfaces unveil connection between macroscopic and molecular structure

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DOI	10.1073/pnas.1703056114
	Single-crystal Ih ice surfaces unveil connection between macroscopic and molecular structure
	Brumberg A.; Hammonds K.; Baker I.; Backus E.H.G.; Bisson P.J.; Bonn M.; Daghlian C.P.; Mezger M.D.; Shultz M.J.
发表日期	2017
ISSN	0027-8424
起始页码	5349
结束页码	5354
卷号	114 期号:21
英文摘要	Physics and chemistry of ice surfaces are not only of fundamental interest but also have important impacts on biological and environmental processes. As ice surfaces-particularly the two prism faces-come under greater scrutiny, it is increasingly important to connect the macroscopic faces with the molecular-level structure. The microscopic structure of the ubiquitous ice Ih crystal is well-known. It consists of stacked layers of chair-form hexagonal rings referred to as molecular hexagons. Crystallographic unit cells can be assembled into a regular right hexagonal prism. The bases are labeled crystallographic hexagons. The two hexagons are rotated 30° with respect to each other. The linkage between the familiar macroscopic shape of hexagonal snowflakes and either hexagon is not obvious per se. This report presents experimental data directly connecting the macroscopic shape of ice crystals and the microscopic hexagons. Large ice single crystals were used to fabricate samples with the basal, primary prism, or secondary prism faces exposed at the surface. In each case, the same sample was used to capture both a macroscopic etch pit image and an electron backscatter diffraction (EBSD) orientation density function (ODF) plot. Direct comparison of the etch pit image and the ODF plot compellingly connects the macroscopic etch pit hexagonal profile to the crystallographic hexagon. The most stable face at the ice- water interface is the smallest area face at the ice-vapor interface. A model based on the molecular structure of the prism faces accounts for this switch.
英文关键词	EBSD; Etching; Ice; Molecular structure; Statistical model
语种	英语
scopus关键词	ice; Article; chemical structure; crystal; crystallography; diagnostic procedure; electron diffraction; microscopy; priority journal; prism; surface property
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159063
作者单位	Brumberg, A., Department of Chemistry, Laboratory for Water and Surface Studies, Tufts University, Medford, MA 02155, United States; Hammonds, K., Department of Civil Engineering, Montana State University, Bozeman, MT 59717, United States; Baker, I., Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States; Backus, E.H.G., Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz, 55128, Germany; Bisson, P.J., Department of Chemistry, Laboratory for Water and Surface Studies, Tufts University, Medford, MA 02155, United States; Bonn, M., Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz, 55128, Germany; Daghlian, C.P., Electron Microscope Facility, Dartmouth College, Hanover, NH 03755, United States; Mezger, M.D., Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz, 55128, Germany, Institute of Physics, Johannes Gutenberg University Mainz, Mainz, 55128, Germany; Shultz, M.J., D...
推荐引用方式 GB/T 7714	Brumberg A.,Hammonds K.,Baker I.,et al. Single-crystal Ih ice surfaces unveil connection between macroscopic and molecular structure[J],2017,114(21).
APA	Brumberg A..,Hammonds K..,Baker I..,Backus E.H.G..,Bisson P.J..,...&Shultz M.J..(2017).Single-crystal Ih ice surfaces unveil connection between macroscopic and molecular structure.Proceedings of the National Academy of Sciences of the United States of America,114(21).
MLA	Brumberg A.,et al."Single-crystal Ih ice surfaces unveil connection between macroscopic and molecular structure".Proceedings of the National Academy of Sciences of the United States of America 114.21(2017).