Surface phases of semi-fluorinated alkane melts

O. Gang; J. Ellmann; M. Möller; H. Kraack; E. B. Sirota; B. M. Ocko; M. Deutsch

doi:10.1209/epl/i2000-00216-4

Surface phases of semi-fluorinated alkane melts

O. Gang
, J. Ellmann
, M. Möller
, H. Kraack
, E. B. Sirota
, B. M. Ocko
, M. Deutsch

Department of Physics - at Bar-Ilan University

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

40 Scopus citations

Abstract

An ordered monolayer is found to form at the free surface of semi-fluorinated alkane melts, F(CF₂)₁₂(CH₂)_nH, a few degrees above the bulk freezing point. X-ray and surface tension measurements show the monolayer to assume one of two different structures, depending on n. For n ∼ 10 the structure is fully crystalline, while for n ∼ 18 it has only short-range in-plane order. This can be assigned to packing frustration of the different diameter F and H blocks, for chain lengths where their respective intermolecular interactions become comparable.

Original language	English
Pages (from-to)	761-767
Number of pages	7
Journal	EPL
Volume	49
Issue number	6
DOIs	https://doi.org/10.1209/epl/i2000-00216-4
State	Published - 11 Mar 2000

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abstract = "An ordered monolayer is found to form at the free surface of semi-fluorinated alkane melts, F(CF2)12(CH2)nH, a few degrees above the bulk freezing point. X-ray and surface tension measurements show the monolayer to assume one of two different structures, depending on n. For n ∼ 10 the structure is fully crystalline, while for n ∼ 18 it has only short-range in-plane order. This can be assigned to packing frustration of the different diameter F and H blocks, for chain lengths where their respective intermolecular interactions become comparable.",

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AU - Gang, O.

AU - Ellmann, J.

AU - Möller, M.

AU - Kraack, H.

AU - Sirota, E. B.

AU - Ocko, B. M.

AU - Deutsch, M.

PY - 2000/3/11

Y1 - 2000/3/11

N2 - An ordered monolayer is found to form at the free surface of semi-fluorinated alkane melts, F(CF2)12(CH2)nH, a few degrees above the bulk freezing point. X-ray and surface tension measurements show the monolayer to assume one of two different structures, depending on n. For n ∼ 10 the structure is fully crystalline, while for n ∼ 18 it has only short-range in-plane order. This can be assigned to packing frustration of the different diameter F and H blocks, for chain lengths where their respective intermolecular interactions become comparable.

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Surface phases of semi-fluorinated alkane melts

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