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The aim is to explore the molecular orientation in hexagonal ice and its implications for understanding its structure.

February 28, 2026Nanoscale

Spontaneously polarised crystalline water ice

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The aim is to explore the molecular orientation in hexagonal ice and its implications for understanding its structure.
Used vacuum-ultraviolet absorption spectroscopy to analyze hexagonal ice
Prepared ice Ih from pure water vapor condensation
Measured Stark shifts in absorption spectra to assess molecular orientation
Hexagonal ice Ih displays net molecular orientation contrary to conventional understanding
Orientation leads to spontaneous polarization with internal fields of approximately 4 × 106 V m-1
Revised understanding of molecular dipoles in hexagonal ice that were previously thought to be random

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Examines polarization in hexagonal ice, revealing new insights into molecular structure and orientation.

James et al. (2026) studied this question.

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