PMID: 11308691Apr 20, 2001Paper

Positional order and thermal expansion of surface crystalline N-alkane monolayers

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
B M OckoC Venkataraman

Abstract

We report a high-resolution synchrotron grazing incidence x-ray diffraction measurement of a surface crystalline monolayer at the liquid-vapor interface of the n-alkane eicosane (C20H42) just above its melting temperature. The peak width of the surface monolayer rotator phase is shown to be resolution limited and implies positional correlations of at least approximately 1 microm. The high resolution allowed determination of the temperature dependence of the peak position over the narrow (3 degrees C) temperature range of the surface crystal phase. The two-dimensional thermal expansion was determined to be (dA/dT)/A=1.8(+/-0.1)x10(-3) degrees C-1, which is comparable to the expansion in similar chain length bulk n-alkane rotator phases. Our data are consistent with the power-law shaped scattering tails expected from quasi-long-range order in two dimensions.

References

Oct 15, 1992·Physical Review. a·J C Earnshaw, C J Hughes
Jan 23, 1999·Science·E B Sirota, A B Herhold
Feb 15, 1993·Physical Review Letters·X Z WuM Deutsch

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Citations

Feb 17, 2007·The Journal of Chemical Physics·E SloutskinM Deutsch
Oct 6, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·H-G SteinrückB M Ocko
Jun 12, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Shai YefetBenjamin M Ocko
Oct 4, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·E SloutskinM Deutsch
Oct 3, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·E SloutskinM Deutsch
Oct 4, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·E SloutskinM Deutsch
Jul 1, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·H KraackM Deutsch

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