Probing low-temperature water ice phases using electron-stimulated desorption

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Low-energy electron-stimulated desorption (ESD) of D+from D2O has been used to examine the phase and growth behavior of nanoscale vapor-deposited ice films grown on Pt(111) between 90-155 K. The D+yield from porous amorphous solid water (deposited at 90 K) shows evidence for sintering near 120 K, increases between 120 and 140 K, and then drops at the amorphous-crystalline phase transition near 155 K. Ice deposited at 155 K forms an epitaxial crystalline film, with a D+yield nearly one-third larger than the yield from crystalline films prepared by annealing the amorphous phase. This suggests that the film formed by annealing may have a different crystalline ordering or morphology than the epitaxial film deposited between 150 and 155 K. Ice deposited at 90 K on top of the epitaxial film is amorphous, but it crystallizes to a form similar to that of the underlying crystalline ice substrate. This suggests that, in this case, the buried two-dimensional interface nucleates the crystallization.




Sieger, M. T., & Orlando, T. M. (2000). Probing low-temperature water ice phases using electron-stimulated desorption. Surface Science, 451(1), 97–101.

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