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Kotlewski, A. (author)Organogels and liquid crystals are both well known classes of materials covering a broad spectrum of molecules, structures and morphologies. In this thesis characterization of novel triphenylene based organogels is described in connection with the mesomorphic liquid crystalline properties of the pure materials. In the course of this study...doctoral thesis 2009
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Xu, M. (author)Diffraction gratings are being used to manipulate light in many different applications, such as in flat panel display systems, modern lighting systems, and optical recording. Diffraction gratings can be made polarization selective due to form birefringence. An alternative approach to polarization selective gratings is to use birefringent...doctoral thesis 2009
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- Lang, D. (author) doctoral thesis 2008
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Kühne, E. (author)In the last decades a large number of applications with ionic liquids (IL) have emerged, and since the discovery that carbon dioxide can tune the miscibility of IL+organic mixtures, special attention has been drawn to the use of IL and CO2 as combined solvents for synthesis and extractions. To evaluate the applicability of the miscibility switch...doctoral thesis 2008
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- Zoeteweij, M.L. (author) doctoral thesis 2007
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Kruglova, O.V. (author)The dynamics and conductivity of the discotic liquid-crystal, hexakis(n-hexylox) triphenylene (HAT6), and charge-transfer complex that it forms with 2,4,7trinitro-9-fluorenone (TNF) are studied using quasielastic neutron-scattering (QENS) and Pulse-Radiolysis Time resolved Conductivity. These two techniques measure the molecular dynamics and...doctoral thesis 2007
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Ceballos Castillo, C.A. (author)Transmutation is useful to reduce the storing time and the amount of nuclear waste to be stored in the geological repository. Transmutation can be achieved in all types of reactors: thermal systems, fast systems, critical and subcritical systems. Fast spectrum systems have significant advantages because they offer higher transmutation efficiency...doctoral thesis 2007
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Vuelban, E.M. (author)Abstract not availabledoctoral thesis 2006
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Kroon, M.C. (author)A new and general type of process for the chemical industry is presented using ionic liquids and supercritical carbon dioxide as combined reaction and separation media. In this process, the carbon dioxide pressure controls the miscibility of reactants, products, catalyst and ionic liquid, enabling fast atom-efficient reactions in a homogenous...doctoral thesis 2006
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De Ruijter, C. (author)This thesis describes the synthesis and properties of liquid crystalline block copolymers comprised of alternating rigid and flexible blocks for the preparation of self-reinforcing materials. The incentive for this work was the expectation that the rigid segments would phase separate on a microscopic scale, and would form nematic domains, which...doctoral thesis 2006
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Loktev, M.Y. (author)Modal wavefront correctors are active optical components for the compensation of aberrated optical wavefronts in a smooth and continuous way. They are traditionally represented by membrane and continuous faceplate deformable mirrors. This thesis is dedicated to the investigation and development of modal wavefront correctors based on nematic...doctoral thesis 2005
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- Oey, R.S. (author) doctoral thesis 2005
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- Viale, S.M.J. (author) doctoral thesis 2005
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Van 't Hof, A. (author)Knowledge of physical properties of pure components and mixtures is essential when designing new processes or improving the efficiency of existing processes. However, mixture properties at the physical conditions relevant to the process are hardly ever available. Computer power has increased considerably over the last years. Thus, it is possible...doctoral thesis 2005
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Meewisse, J.W. (author)Ice slurries are liquid solutions of a freezing point depressant in water, in which small ice crystals are present. Ice slurries are efficient secondary cooling fluids because they utilize the latent heat effect involved with the ice/water phase change. A high heat capacity is available at relatively constant temperatures, while ice slurries are...doctoral thesis 2004
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Garate, M.P. (author)In this dissertation we study Detergency in liquid Carbon Dioxide. Detergency is the cleaning performance of additives, surfactants in particular, in washing fluids. Liquid CO2 is under consideration, for environmental and toxicological reasons, to replace perchloro-ethylene as the solvent in textile dry cleaning technology. Inherent problems of...doctoral thesis 2004
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- Nguyen, Q. (author) doctoral thesis 2004
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- De Deugd, R.M. (author) doctoral thesis 2004
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Kouwer, P.H.J. (author)Liquid crystals comprise a class of materials in which characteristic properties of crystals and liquids are combined. The materials show partly ordered fluid phases, between the common solid and the liquid phases. The combination of order and a high mobility is applied in the well-known liquid crystalline displays (LCD's). This thesis describes...doctoral thesis 2002
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- Jansen, J.C. (author) doctoral thesis 1996