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hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorGRAUBY-HEYWANG, Christine
hal.structure.identifierA.N. Frumkin Institute of Physical Chemistry and Electrochemistry
dc.contributor.authorSELECTOR, Sophia
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorABRAHAM, Emmanuel
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorJONUSAUSKAS, Gediminas
dc.date.issued2011
dc.description.abstractEnWe studied in this work the organization of a hemicyanine dye in Langmuir monolayers and Langmuir-Blodgett (LB) films. Surface pressure measurements revealed the complex behaviour of this molecule at the air-water interface, since three different π-A compression isotherms were obtained under similar experimental conditions. The probability to get one type of isotherm as compared to the others depends on the amount of salts added to adjust the subphase pH, these salts acting as "structure breakers". Absorption spectra of hemicyanine LB films reveals under specific experimental conditions the presence of H-aggregates into the films, molecules in aggregates being characterized by a particular orientation as compared to surrounding monomers. Their fluorescence images are also different according to corresponding π-A isotherms and pH subphase, showing domains with specific patterns and organization.
dc.language.isoen
dc.subject.enmonolayer
dc.subject.enHemicyanine
dc.subject.enLangmuir-Blodgett films
dc.subject.enfluorescence microscopy
dc.title.enComplex Behavior of Hemicyanine in Langmuir-Blodgett Films Revealed by Surface Pressure Measurements and Fluorescence Microscopy
dc.typeArticle de revue
dc.identifier.doi10.1134/S2070205111010059
dc.subject.halPhysique [physics]/Physique [physics]/Optique [physics.optics]
bordeaux.journalProtection of Metals and Physical Chemistry of Surfaces
bordeaux.page31-38
bordeaux.volume47
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00608637
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00608637v1
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