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Growth of lipid vesicle structures : from surface fractals to mass fractals
Roldán Vargas, Sándalo (Universidad de Granada. Departamento de Física Aplicada)
Barnadas Rodríguez, Ramon (Universitat de Barcelona. Unitat de Fisicoquímica)
Martín Molina, Alberto (Universidad de Granada. Departamento de Física Aplicada)
Quesada Pérez, Manuel (Universidad de Jaén. Departamento de Física)
Estelrich, Joan (Universitat de Barcelona. Unitat de Fisicoquímica)
Callejas Fernández, José (Universidad de Granada. Departamento de Física Aplicada)

Data: 2008
Resum: We study fractal vesicle aggregates whose morphology is conditioned by the interaction between the lipid vesicle membranes and calcium and magnesium ions. These morphologies are probed by means of static light scattering using a cross-correlation scheme that avoids the multiple intracluster scattering. In contrast to the branched structures induced by calcium, we report a singular surface- to mass-fractal transition controlled by the magnesium concentration. From infrared spectroscopy data we conclude that the specific dehydration of the lipid membranes due to these cations plays an essential role in short-range intervesicle interactions.
Drets: Tots els drets reservats.
Llengua: Anglès.
Document: article ; recerca ; publishedVersion
Publicat a: Physical review. E : Statistical, nonlinear, and soft matter physics, Vol. 78, Number 1 (July 2008) , p. 010902/1-010902/4, ISSN 1539-3755

DOI: 10.1103/PhysRevE.78.010902

4 p, 224.2 KB

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