Close-Packed Ices in Nanopores

Kenji Mochizuki, Yuji Adachi, Kenichiro Koga

研究成果査読

2 被引用数 (Scopus)

抄録

Water molecules in any of the ice polymorphs organize themselves into a perfect four-coordinated hydrogen-bond network at the expense of dense packing. Even at high pressures, there seems to be no way to reconcile the ice rules with the close packing. Here, we report several close-packed ice phases in carbon nanotubes obtained from molecular dynamics simulations of two different water models. Typically they are in plastic states at high temperatures and are transformed into the hydrogen-ordered ice, keeping their close-packed structures at lower temperatures. The close-packed structures of water molecules in carbon nanotubes are identified with those of spheres in a cylinder. We present design principles of hydrogen-ordered, close-packed structures of ice in nanotubes, which suggest many possible dense ice forms with or without nonzero polarization. In fact, some of the simulated ices are found to exhibit ferroelectric ordering upon cooling.

本文言語English
ページ(範囲)347-354
ページ数8
ジャーナルACS Nano
18
1
DOI
出版ステータスPublished - 1月 9 2024

ASJC Scopus subject areas

  • 材料科学一般
  • 工学一般
  • 物理学および天文学一般

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