English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/16024
Título

Langmuir monolayers of the zwitterionic surfactant hexadecyl 1-N-l-tryptophan glycerol ether

AutorVelázquez, Mercedes M.; Ortega, Francisco; Monroy, Francisco; Rubio, Ramón; Pegiadou, Sofía; Pérez, Lourdes; Infante, María Rosa
Palabras claveLangmuir monolayers
Hexadecyl 1-N-l-tryptophan glycerol ether
Surface potential
Fluorescence microscopy
Infrared reflection–absorption spectroscopy (IRRAS)
Quasielastic light scattering (SQELS)
Fecha de publicación1-mar-2005
EditorElsevier
CitaciónJournal of Colloid and Interface Science 283(1): 144-152 (2005)
ResumenWe report the formation of Langmuir monolayers of pure zwitterionic hexadecyl 1-N-l-tryptophan glycerol ether (C16-TGE) surfactant and mixed monolayers of cationic–zwitterionic surfactant obtained modifying the pH of the subphase. The pressure–area and surface potential–area isotherms and fluorescence microscopy measurements have been used to characterize the surface phase transitions in the monolayers. These transitions appeared at larger areas as the pH decreased from 6.0 to 2.0 and almost disappeared as the pH decreased further. The analysis of the surface potential and the infrared reflection–absorption spectroscopy data suggests that the phase transition is associated with a change of orientation of both the hydrocarbon chain and the aromatic group of the surfactant with respect to the air–water surface. The surface rheology of the monolayers was studied by quasielastic light scattering and by the oscillatory barrier technique. The results indicate that there is at least one relaxation process in the monolayer.
Descripción9 pages, 9 figures, 2 tables.-- PMID: 15694435 [PubMed].-- Available online Dec 9, 2004.
Versión del editorhttp://dx.doi.org/10.1016/j.jcis.2004.08.173
URIhttp://hdl.handle.net/10261/16024
DOI10.1016/j.jcis.2004.08.173
ISSN0021-9797 (Print)
1095-7103 (Online)
Aparece en las colecciones: (IQAC) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.