Structural modifications of vesicular aggregates following gamma-irradiation |
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| Affiliation: | 1. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece;2. Jülich Centre for Neutron Science JCNS Forschungszentrum Jülich GmbH, Outstation at Heinz Maier-Leibnitz Zentrum (MLZ), Lichtenbergstraße 1, 85747 Garching, Germany;1. Stranski Laboratorium für Physikalische Chemie und Theoretische Chemie, Institut für Chemie, Strasse des 17. Juni 124, Sekr. TC7, Technische Universität Berlin, D-10623 Berlin, Germany;2. Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs 38042 Grenoble Cedex 9, France |
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| Abstract: | The structural changes of the didodecyldimethylammonium bromide (DDAB) vesicular bilayers after γ-irradiation and under conditions where mainly OH radicals are present are reported.Alterations of the vesicular structure, such as polarity and fluidity, were detected after a dose of 0.65 kGy. A higher dose of ~ 14 kGy cause important damage to the well organized molecular structure and this is manifested by an important augmentation of the fluidity and polarity of the Stern region of the aggregates.Increased water penetration into the bilayer of the vesicle is probably the reason for these changes and electron micrographs support this hypothesis. |
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