A new surface phase in liquid normal-alkanes

X. Z. Wu; B. M. Ocko; E. B. Sirota; S. K. Sinha; M. Deutsch

doi:10.1016/0378-4371(93)90583-p

A new surface phase in liquid normal-alkanes

X. Z. Wu, B. M. Ocko, E. B. Sirota, S. K. Sinha, M. Deutsch

Department of Physics - at Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

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Abstract

A new surface phase is found in liquid normal-alkanes. X-ray and surface tension measurements show the formation of a crystalline monolayer on the surface of the liquid at temperatures up to 3°C above the bulk solidification temperature, T_f. The molecules in the monolayer are hexagonally packed and oriented normal to the surface. A single solid monolayer persists down to T_f, thus exhibiting a very limited partial wetting. The new surface phase is obtained only for chain lengths 14<n≤50. Its vanishing for n≤14 is interpreted as a possible transition from surface freezing to surface melting behaviour. The measurements are satisfactory accounted for within a simple theory based on surface energy cosiderations.

Original language	English
Pages (from-to)	751-758
Number of pages	8
Journal	Physica A: Statistical Mechanics and its Applications
Volume	200
Issue number	1-4
DOIs	https://doi.org/10.1016/0378-4371(93)90583-p
State	Published - 15 Nov 1993

Bibliographical note

Funding Information:
Helpful discussionsw ith and help of M.W. Kim and B.H. Cao are gratefully acknowledged.M .D.‘s work is supportedb y the US-Israel Binational Foundation, Jerusalem. Brookhaven National Laboratory is supportedb y the Division of Materials Research, US Department of Energy under contract No. DE-AC02-76CH00016.

Funding

Helpful discussionsw ith and help of M.W. Kim and B.H. Cao are gratefully acknowledged.M .D.‘s work is supportedb y the US-Israel Binational Foundation, Jerusalem. Brookhaven National Laboratory is supportedb y the Division of Materials Research, US Department of Energy under contract No. DE-AC02-76CH00016.

Funders	Funder number
US Department of Energy
Division of Materials Research

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AU - Deutsch, M.

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A new surface phase in liquid normal-alkanes

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