Pyroelectricity of water ice

The Journal of Physical Chemistry. B
Hanfu WangJames P Cowin

Abstract

Water ice usually is thought to have zero pyroelectricity by symmetry. However, biasing it with ions breaks the symmetry because of the induced partial dipole alignment. This unmasks a large pyroelectricity. Ions were soft-landed upon 1 mum films of water ice at temperatures greater than 160 K. When cooled below 140-150 K, the dipole alignment locks in. Work function measurements of these films then show high and reversible pyroelectric activity from 30 to 150 K. For an initial approximately 10 V induced by the deposited ions at 160 K, the observed bias below 150 K varies approximately as 10 Vx(T/150 K)2. This implies that water has pyroelectric coefficients as large as that of many commercial pyroelectrics, such as lead zirconate titanate (PZT). The pyroelectricity of water ice, not previously reported, is in reasonable agreement with that predicted using harmonic analysis of a model system of SPC ice. The pyroelectricity is observed in crystalline and compact amorphous ice, deuterated or not. This implies that for water ice between 0 and 150 K (such as astrophysical ices), temperature changes can induce strong electric fields (approximately 10 MV/m) that can influence their chemistry, ion trajectories, or binding.

References

Dec 27, 2005·The Journal of Chemical Physics·G ZimbitasA Hodgson
Mar 17, 2006·The Journal of Physical Chemistry. a·George S Fanourgakis, Sotiris S Xantheas
Mar 16, 2007·Physical Review Letters·Yigal LilachJames P Cowin

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Citations

Oct 29, 2013·The Journal of Chemical Physics·Yonatan Horowitz, Micha Asscher
Apr 10, 2012·The Journal of Chemical Physics·Yonatan Horowitz, Micha Asscher
Mar 17, 2017·The Journal of Chemical Physics·Irini K GavraAthanassios A Tsekouras
May 8, 2013·Angewandte Chemie·Silvia PipernoIgor Lubomirsky
Oct 3, 2020·The Journal of Chemical Physics·Roey SagiMicha Asscher

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