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Dresden 2014 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 36: Colloids and Complex Liquids II

CPP 36.4: Talk

Wednesday, April 2, 2014, 15:45–16:00, ZEU 114

Sub-millisecond dynamics of vesicles formation — •Rita Graceffa1,2, Sagar V. Kathuria3, Raul A. Barrea1, R. Paul Nobrega3, Srinivas Chakravarthy1, Osman Bilsel3, Thomas C. Irving1 und Thomas M. Weiss41BioCAT, CSRRI and Department BCS, Illinois Institute of Technology, 3101 South Dearborn, Chicago, IL 60616, USA — 2Institute for X-ray Physics, Georg-August-Universitat Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen, Germany — 3Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 364 Plantation Street, LRB 919, Worcester, MA 01605, USA — 4Stanford University, Stanford Synchrotron Radiation Lightsource, 2575 Sand Hill Rd. MS69, Menlo Park, CA 94025, USA

Recently, the formation of vesicles has been studied in situ at millisecond time-scales and disk like intermediate states have been shown to exist in some mixed systems composed of zwitterionic and anionic surfactants. However, for vesicle formation from cationic-anionic surfactant mixture no such intermediates could be detected at the achieved time resolution.

We present a study of dynamics formation of unilamellar vesicles from a mixture of oppositely charged surfactants in the microseconds range. The vesicles spontaneous self-assembly was investigated by mixing anionic and cationic micelles in a micro-mixer. The reaction intermediates were probed with Small Angle X-ray and Förster Resonance Energy Transfer. The formation of the vesicles happens within the mixing time, 100 microseconds.

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