Phase transitions and diffusion of colloid-polymer systems and thin ferroelectric films for device applications

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dc.contributor.advisorRobert, Marc A.
dc.creatorLee, Jiun-Ting
dc.date.accessioned2009-06-04T08:07:22Z
dc.date.available2009-06-04T08:07:22Z
dc.date.issued2000
dc.description.abstractThis thesis is divided into two independent parts: the first part deals with the phase transitions and diffusion of colloid-polymer systems, while the second part concerns the growth of thin ferroelectric films, their physical and chemical characterizations, and theoretical predictions for surface-acoustic-wave (SAW) propagation. In the first part, the phase transitions of colloid-polymer systems are studied by experiment and theory in both two and three dimensions. For a colloid-polymer system consisting of polystyrene spheres in aqueous solutions of hydroxyethylcellulose, the transitions are examined experimentally using enhanced videomicroscopy with particle resolution, and the results are compared with statistical mechanical predictions based on the Percus-Yevick and mean-field approximations. The Brownian motion of colloidal particles in polymer solutions is also investigated for the system of colloid (polystyrene)-polymer (polyethyleneoxide), and the diffusivity is determined as a function of polymer concentration. In the second part, thin films of the ferroelectric lithium niobate are deposited by radio-frequency magnetron sputtering on diamond-coated silicon substrates for high-frequency SAW-device applications. The SAW velocity and electromechanical coupling coefficient are predicted theoretically for various film orientations and thicknesses. Moreover, thin films of the ferroelectric barium titanate are deposited on silicon substrates for random-access-memory applications, and their crystal and electrical properties are investigated.
dc.format.extent221 p.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.callnoTHESIS CH.E. 2000 LEE
dc.identifier.citationLee, Jiun-Ting. "Phase transitions and diffusion of colloid-polymer systems and thin ferroelectric films for device applications." (2000) Diss., Rice University. <a href="https://hdl.handle.net/1911/19527">https://hdl.handle.net/1911/19527</a>.
dc.identifier.urihttps://hdl.handle.net/1911/19527
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectChemical engineering
dc.subjectElectronics
dc.subjectElectrical engineering
dc.subjectEngineering
dc.subjectMaterials science
dc.titlePhase transitions and diffusion of colloid-polymer systems and thin ferroelectric films for device applications
dc.typeThesis
dc.type.materialText
thesis.degree.departmentChemical Engineering
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy
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