Observation of surface layering in a nonmetallic liquid

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Oscillatory density profiles (layers) have previously been observed at the free surfaces of liquid metals, but not in other isotropic liquids. We have used x-ray reflectivity to study a molecular liquid, tetrakis(2-ethylhexoxy)silane. When cooled to T/Tc~0.25 (well above the freezing point for this liquid), density oscillations appear at the surface. Lateral order within the layers is liquid-like. Our results confirm theoretical predictions that a surface-layered state will appear even in dielectric liquids at sufficiently low temperatures, if not preempted by freezing.
accepted for publication in Phys. Rev. Lett. 15 pages 4 figures

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/103073

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0510712
 http://arxiv.org/abs/cond-mat/0510712
 Phys. Rev. Lett. 96, 096107 (2006)
 doi:10.1103/PhysRevLett.96.096107

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arXiv