Donnelly Stephen E, Birtcher Robert C, Allen Charles W, Morrison Ian, Furuya Kazuo, Song Minghui, Mitsuishi Kazutaka, Dahmen Ulrich
Joule Physics Laboratory, Institute for Materials Research, University of Salford, Manchester M5 4WT, UK. :
Science. 2002 Apr 19;296(5567):507-10. doi: 10.1126/science.1068521. Epub 2002 Mar 21.
High-resolution transmission electron microscopy images of room-temperature fluid xenon in small faceted cavities in aluminum reveal the presence of three well-defined layers within the fluid at each facet. Such interfacial layering of simple liquids has been theoretically predicted, but observational evidence has been ambiguous. Molecular dynamics simulations indicate that the density variation induced by the layering will cause xenon, confined to an approximately cubic cavity of volume approximately 8 cubic nanometers, to condense into the body-centered cubic phase, differing from the face-centered cubic phase of both bulk solid xenon and solid xenon confined in somewhat larger (>/=20 cubic nanometer) tetradecahedral cavities in face-centered cubic metals. Layering at the liquid-solid interface plays an important role in determining physical properties as diverse as the rheological behavior of two-dimensionally confined liquids and the dynamics of crystal growth.
铝中多面体小空腔内室温流体氙的高分辨率透射电子显微镜图像显示，在每个晶面的流体中存在三个清晰界定的层。这种简单液体的界面分层现象在理论上已被预测，但观测证据一直不明确。分子动力学模拟表明，分层引起的密度变化将导致被限制在体积约为8立方纳米的近似立方体空腔内的氙凝聚成体心立方相，这与块状固态氙以及面心立方金属中限制在稍大（≥20立方纳米）的十四面体空腔内的固态氙的面心立方相不同。液 - 固界面处的分层在决定诸如二维受限液体的流变行为和晶体生长动力学等多种物理性质方面起着重要作用。
