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dc.contributor.advisorShen, Shen Qen_US
dc.contributor.authorCardiel, Joshua Jeremyen_US
dc.date.accessioned2014-10-20T20:10:31Z
dc.date.submitted2014en_US
dc.identifier.otherCardiel_washington_0250E_13376.pdfen_US
dc.identifier.urihttp://hdl.handle.net/1773/26754
dc.descriptionThesis (Ph.D.)--University of Washington, 2014en_US
dc.description.abstractSurfactant molecules can self-assemble into various morphologies under proper combinations of surfactant concentration, temperature, and flow conditions. In equilibrium, micelles can transition from entangled to branched structures with increasing ionic strength and temperature. Under flow conditions, micellar structure transition can follow different trajectories. In the present work, the structural and rheological evolution of both ionic and non-ionic micellar solutions are studied. When both ionic and non-ionic micellar solutions are subjected to strain rates ∼10^3 s−1 and strain ∼10^3, we observe the formation of stable flow-induced structured phases (FISPs), with entangled, branched, and multi-connected micellar bundles, evidenced by electron microscopy (cryo-EM, TEM, and SEM) and small-angle neutron scattering (SANS). The rheological properties of both ionic and non-ionic micellar solutions and their corresponding FISPs are obtained by using one point passive microrheology and two point passive microrheology. The rheological properties variation from the original micellar solutions to their corresponding FISPs is associated with the structural evolution from the precursor to FISPs. The formation of FISPs is correlated with local micellar gradients concentrations, hight stretching in the microposts arrays, entropic fluctuations, flow kinematics, and microspatial confinement. Finally, some potential sensing applications and nanotemplating uses of the FISPs are presented.en_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.rightsCopyright is held by the individual authors.en_US
dc.subjectcryo-EM; Micelles; Microfluidics; Rheology; SANSen_US
dc.subject.otherMechanical engineeringen_US
dc.subject.otherMaterials Scienceen_US
dc.subject.otherNanotechnologyen_US
dc.subject.othermechanical engineeringen_US
dc.titleMicrofluidics enhanced synthesis of micellar nanostructuresen_US
dc.typeThesisen_US
dc.embargo.termsRestrict to UW for 5 years -- then make Open Accessen_US
dc.embargo.lift2019-09-24T20:10:31Z


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