Anomalous phase behavior in Langmuir monolayers of monomyristoyl-rac-glycerol at the air-water interface

The effect of temperature on the surface phase behavior in Langmuir monolayers of monomyristoyl-rac-glycerol (MMG) at the air-water interface has been studied by film balance and Brewster angle microscopy (BAM). It is observed that the domains of the MMG monolayers formed in the coexistence region b...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 21(2005), 24 vom: 22. Nov., Seite 10920-2
1. Verfasser: Islam, Md Nazrul (VerfasserIn)
Weitere Verfasser: Kato, Teiji
Format: Aufsatz
Sprache:English
Veröffentlicht: 2005
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Letter
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245 1 0 |a Anomalous phase behavior in Langmuir monolayers of monomyristoyl-rac-glycerol at the air-water interface 
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520 |a The effect of temperature on the surface phase behavior in Langmuir monolayers of monomyristoyl-rac-glycerol (MMG) at the air-water interface has been studied by film balance and Brewster angle microscopy (BAM). It is observed that the domains of the MMG monolayers formed in the coexistence region between the liquid expanded (LE) and liquid condensed (LC) phases retain their circular shape over the studied temperature range, showing a sharp contrast to the temperature-dependent monolayer morphologies of amphiphilic systems where the shape of condensed domains changes either from compact circular to fingering or from irregular or spiral to compact patterns with increasing temperature. It is concluded that the system is capable of tuning the line tension of the interface by the effect of the increase in the hydrophobic character because of dehydration of the headgroup, which imparts to the molecules the properties of similar molecules but with less hydrophilic headgroups. As a result, the domains can retain their circular shape even up to the maximum possible temperature of the phase transition 
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