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Thermoreversible Transitions Between Self-Assembled Nanostructures in Aqueous Solution

dc.contributor.advisorRaghavan, Srinivasa Ren_US
dc.contributor.authorDavies, Tanneren_US
dc.date.accessioned2006-02-04T06:34:34Z
dc.date.available2006-02-04T06:34:34Z
dc.date.issued2005-09-02en_US
dc.identifier.urihttp://hdl.handle.net/1903/3053
dc.description.abstractWe study an unusual transition between two different types of self-assembled structures in aqueous solutions. Mixtures of a cationic surfactant, CTAB and the organic compound, 5-methyl salicylic acid (5mS) spontaneously self-assemble into unilamellar vesicles at room temperature. Upon heating, these vesicles undergo a thermoreversible transition to "wormlike" micelles, i.e., long, flexible micellar chains. This phase transition results in a 1000-fold increase in the solution viscosity with increasing temperature. Small-angle neutron scattering (SANS) measurements show that the phase transition from vesicles to micelles is a continuous one, with the vesicles and micelles co-existing over a range of temperatures. The tunable vesicle-to-micelle transition and the concomitant viscosity increase upon heating may have utility in a range of areas including microfluidics, drug delivery, and enhanced oil recovery.en_US
dc.format.extent4977340 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.titleThermoreversible Transitions Between Self-Assembled Nanostructures in Aqueous Solutionen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentChemical Engineeringen_US
dc.subject.pqcontrolledEngineering, Chemicalen_US


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