Surface phase behavior in Gibbs monolayers of bis(ethylene glycol) mono-n-tetradecyl ether at the air-water interface

Langmuir : the ACS Journal of Surfaces and Colloids
Md Nazrul Islam, Teiji Kato

Abstract

We present the adsorption kinetics and surface morphology of the adsorbed monolayers of bis(ethylene glycol) mono-n-tetradecyl ether (C14E2) by film balance and Brewster angle microscopy. A cusp point followed by a plateau region in the pressure (pi)-time (t) adsorption isotherm indicates a first-order phase transition in the coexistence region between a lower density liquid expanded (LE) phase and a higher density liquid condensed (LC) phase. A variety of condensed phase domains surrounded by the homogeneous LE phase are observed just after the appearance of the phase transition. The domains are of a spiral or striplike structure at lower temperatures. This characteristic shape of the domains is because of strong dipole-dipole repulsion between the molecules. At 18 degrees C, the domains are found to be quadrant structures. A slight increase in subphase temperature (around 1 degrees C) brings about a quadrant-to-circular shape transition in the domains. The circular domains return to quadrant structures as the subphase temperature is lowered. The domains completely disappear when the temperature is increased beyond 19 degrees C, suggesting that the critical temperature for the condensed domain formation is 19 degrees C. Above ...Continue Reading

References

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Citations

Jun 7, 2005·Journal of Colloid and Interface Science·Hongbo LiJiacong Shen
Oct 22, 2014·Physical Chemistry Chemical Physics : PCCP·Elena S KartashynskaReinhard Miller
May 11, 2010·Journal of Colloid and Interface Science·Md Mufazzal HossainTeiji Kato
Nov 28, 2006·Journal of Colloid and Interface Science·Md Mufazzal HossainTeiji Kato
Jun 24, 2014·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Artem KovalenkoMarie Pierre Krafft
Feb 16, 2010·Advances in Colloid and Interface Science·D Vollhardt, V B Fainerman
Dec 4, 2004·Journal of Colloid and Interface Science·Md Nazrul Islam, Teiji Kato
Sep 27, 2005·Journal of Colloid and Interface Science·Md Nazrul Islam, Teiji Kato
Jul 19, 2005·Journal of Colloid and Interface Science·Md Nazrul Islam, Teiji Kato
Jun 2, 2005·Journal of Colloid and Interface Science·Md Mufazzal HossainTeiji Kato
Jul 10, 2008·The Journal of Physical Chemistry. B·Israel Cabasso, Elvira Stesikova
Apr 25, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Nawal DerkaouiMireille Privat
Nov 16, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Md Nazrul Islam, Teiji Kato
Mar 9, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Md Nazrul Islam, Teiji Kato
Dec 1, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Md Nazrul Islam, Teiji Kato

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