Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"polydomain"”.
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The interplay between order and disorder in cholesteric hydroxypropyl cellulose films
… the interplay between order and disorder in polydomain cholesteric films. First, an open-source Python toolkit (PyLlama) was developed to model the optical response of arbitrary multilayer stacks, and applied to the specific case of a monodomain cholesteric liquid crystal. These results were …
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Order reconstruction and solution landscapes for liquid crystalline systems
… (OR) solutions. These OR solutions describe polydomain structures i.e., multiple sub-domains separated by domain walls. We study OR solutions within the Landau de Gennes continuum theory for liquid crystals in a reduced, one-dimensional setting relevant for microfluidic problems. OR solutions …
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Statistical physics of isotropic-genesis nematic elastomers
… of a certain equilibrium state (known as the polydomain state) of an IGNE. This state is characterized by the presence of a short-ranged, anti-correlated pattern of nematic alignment. By taking the thermal fluctuations of the elastomer medium into account, in addition to those of the nematogen …
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Photonic Properties of Self -Assembled Organic Materials: Supramolecular Films, and Nanoribbon -Templated Gels and Polymers
… materials is relatively low, possibly caused by polydomain structures. To improve the polarization, glass substrates were patterned with periodic arrays of squares with lateral dimensions of 7 and 17mum, created by focused ion beams. The average molecular tilt angle was found smaller in the films …
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Dielectric and pyroelectric susceptibilities of epitaxial ferroelectric thin films
… herein that enable this are the development of a polydomain GLD model to predict ferroelectric susceptibilities, the development of a hard-mask technique for the fabrication epitaxial capacitor structures, and the implementation of a phase-sensitive technique for the accurate measurement of …
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Investigations into the mechanics of connective tissue
… liquid crystal elastomers (CLCEs), and 3D polydomain liquid crystal elastomers (3DLCEs). The setup accurately demonstrated the incompressibility of PDMS, even at short time scales, and demonstrated how DIC can map the inhomogeneity of material by locating clusters of CNTs in CNT elastomers …
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First Principles Studies of Magnetic Oxides, Spin-Driven Ferroelectricity, and the Effect of Polarization in the Chemistry of Functional Heterointerfaces
… the functional interface between graphene and polydomain ferroelectrics as platform for novel field effect transistors. Here, we present both a theoretical understanding of how ferroelectric polarization direction affects the graphene carrier density and with help from our experimental …
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Textured fluids
… played by liquid crystalline order (LCO) and a polydomain texture on the rheology of PPT solutions was investigated. It was found that several of the rheological phenomena commonly attributed to liquid crystalline order in polymers (e.g., three region flow curve, negative steady state first …
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Competing polar and nonpolar distortions and phase transitions in low-dimensional materials
… both by domains and a 2DEG. We find that the polydomain and monodomain phases are separated by a region of coexistence in which both phenomena are simultaneously observed. \noindent The final example comes from twistronics, an emerging field in which the properties of layered systems are tuned …
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Cellulose photonics: designing functionality and optical appearance of natural materials
Cellulose is the most abundant biopolymer on Earth as it is found in every plant cell wall; therefore, it represents one of the most promising natural resources for the fabrication of sustainable materials. In plants, cellulose is mainly used for structural integrity, however, some species organise …