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How Cubic Can Ice Be?
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2017 (engelsk)Inngår i: Journal of Physical Chemistry Letters, ISSN 1948-7185, E-ISSN 1948-7185, Vol. 8, nr 14, s. 3216-3222Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Using an X-ray laser, we investigated the crystal structure of ice formed by homogeneous ice nucleation in deeply supercooled water nanodrops (r approximate to 10 nm) at similar to 225 K The nanodrops were formed by condensation of vapor in a supersonic nozzle, and the ice was probed within 100 mu s of freezing using femtosecond wide-angle X-ray scattering at the Linac Coherent Light Source free-electron X-ray laser. The X-ray diffraction spectra indicate that this ice has a metastable, predominantly cubic structure; the shape of the first ice diffraction peak suggests stacking-disordered ice with a cubicity value, chi, in the range of 0.78 +/- 0.05. The cubicity value determined here is higher than those determined in experiments with micron-sized drops but comparable to those found in molecular dynamics simulations. The high cubicity is most likely caused by the extremely low freezing temperatures and by the rapid freezing, which occurs on a similar to 1 mu s time scale in single nanodroplets.

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AMER CHEMICAL SOC , 2017. Vol. 8, nr 14, s. 3216-3222
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URN: urn:nbn:se:kth:diva-212345DOI: 10.1021/acs.jpclett.7b01142ISI: 000406358000010PubMedID: 28657757Scopus ID: 2-s2.0-85025121595OAI: oai:DiVA.org:kth-212345DiVA, id: diva2:1134831
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QC 20170821

Tilgjengelig fra: 2017-08-21 Laget: 2017-08-21 Sist oppdatert: 2017-08-21bibliografisk kontrollert

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Sellberg, Jonas A.

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