Pyroelectricity of water ice
Wang, Hanfu1; Bell, Richard C.2; Iedema, Martin J.1; Schenter, Gregory K.1; Wu, Kai3; Cowin, James P.1
AbstractWater 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 mu m 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 similar to 10 V induced by the deposited ions at 160 K, the observed bias below 150 K varies approximately as 10 V x (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 (similar to 10 MV/m) that can influence their chemistry, ion trajectories, or binding.
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WOS IDWOS:000255905200017
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Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorBell, Richard C.
Affiliation1.Pacific NW Natl Lab, Richland, WA 99352 USA
2.Penn State Univ, Altoona Coll, Dept Chem, Altoona, PA 16601 USA
3.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
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GB/T 7714
Wang, Hanfu,Bell, Richard C.,Iedema, Martin J.,et al. Pyroelectricity of water ice[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2008,112(20):6379-6389.
APA Wang, Hanfu,Bell, Richard C.,Iedema, Martin J.,Schenter, Gregory K.,Wu, Kai,&Cowin, James P..(2008).Pyroelectricity of water ice.JOURNAL OF PHYSICAL CHEMISTRY B,112(20),6379-6389.
MLA Wang, Hanfu,et al."Pyroelectricity of water ice".JOURNAL OF PHYSICAL CHEMISTRY B 112.20(2008):6379-6389.
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