Dewetting of thin amorphous solid water films and liquid-cubic ice coexistence in droplets studied using infrared-absorption and secondary-ion-mass spectroscopy

The Journal of Physical Chemistry. B
Ryutaro Souda

Abstract

The infrared absorption band of decoupled OD stretching vibration (4 mol% HOD in 20-monolayer H2O) of amorphous solid water is red-shifted and sharpened at around 160 K because of spontaneous nucleation. The crystal grows in a fluidized liquid that forms droplets on a Ni(111) substrate. The shape change and red-shift of a coupled OH band during crystallization are elucidated by a Mie particle scattering model, indicating that nanometer-size droplets are formed preferentially. The spontaneous nucleation at 160 K is bypassed when amorphous solid water is deposited on a crystallized water film; the crystals grow around nuclei at ca. 150 K, resulting in larger crystal grains that do not cause Mie scattering. However, the crystal grains behave like viscous droplets because their morphology changes continuously after the completion of crystallization. The coexisting liquid-like water is indistinguishable from cubic ice in local structure. This behavior resembles that of a quasiliquid formed during premelting.

References

Jan 14, 1985·Physical Review Letters·J W Frenken, van der Veen JF
Jul 22, 1997·The Journal of Chemical Physics·P JenniskensM R McCoustra
Jul 13, 2004·Physical Review Letters·Ellen H G BackusMischa Bonn
Dec 17, 2004·Physical Review Letters·Ryutaro Souda
Sep 16, 2005·The Journal of Chemical Physics·G P Johari
Oct 26, 2005·Physical Review Letters·Greg A KimmelBruce D Kay
Nov 23, 2006·The Journal of Chemical Physics·Ryutaro Souda
Sep 1, 2007·The Journal of Physical Chemistry. B·Ryutaro Souda

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Citations

Aug 24, 2012·Chemical Reviews·Jobin CyriacR G Cooks
Feb 18, 2012·Physical Chemistry Chemical Physics : PCCP·Ryutaro Souda
Dec 3, 2008·The Journal of Chemical Physics·Ryutaro Souda
Jul 2, 2010·The Journal of Chemical Physics·Emily B Moore, Valeria Molinero

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