Scholarlink

<p>The physical state of water under extreme confinement can deviate from bulk behavior, yet such effects are typically considered limited to the sub-10&#xa0;nm regime. Here we report a stable solid-like water phase under ambient conditions in SiO₂ microtubules spanning the submicron–micron scale. The confined water shows pronounced solid-like behavior: it can be sectioned by focused ion beam (FIB) milling and deforms plastically under stress rather than flowing, while maintaining a stable morphology from − 20 to 90&#xa0;°C and from high vacuum (10⁻⁵ Pa) to atmospheric pressure. ¹H NMR, Raman, and IR spectra indicate strongly restricted molecular dynamics and a modified hydrogen-bonding environment distinct from bulk liquid water and crystalline ice. ¹H NMR quantification and surface-chemistry controls further identify an exceptionally high density of inner-wall silanol (SiOH) groups as the key factor governing formation and stability, with clear pH dependence and reversible transitions. These findings highlight a mesoscale confinement regime dominated by interfacial chemistry.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A stable solid-like water at normal condition

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月7日

查看全文
  • An Wei-qing,
  • Yue Xiang-an,
  • Zou Ji-rui

摘要

The physical state of water under extreme confinement can deviate from bulk behavior, yet such effects are typically considered limited to the sub-10 nm regime. Here we report a stable solid-like water phase under ambient conditions in SiO₂ microtubules spanning the submicron–micron scale. The confined water shows pronounced solid-like behavior: it can be sectioned by focused ion beam (FIB) milling and deforms plastically under stress rather than flowing, while maintaining a stable morphology from − 20 to 90 °C and from high vacuum (10⁻⁵ Pa) to atmospheric pressure. ¹H NMR, Raman, and IR spectra indicate strongly restricted molecular dynamics and a modified hydrogen-bonding environment distinct from bulk liquid water and crystalline ice. ¹H NMR quantification and surface-chemistry controls further identify an exceptionally high density of inner-wall silanol (SiOH) groups as the key factor governing formation and stability, with clear pH dependence and reversible transitions. These findings highlight a mesoscale confinement regime dominated by interfacial chemistry.