Yeung Yeung = 電化學堆積法產生的金屬聚集物之內部結構 / 楊陽. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references. / Text in English; abstracts in English and Chinese. / Yeung Yeung = Dian hua xue dui ji fa chan sheng de jin shu ju ji wu zhi nei bu jie gou / Yang Yang. / Acknowledgement --- p.i / Abstract --- p.ii / 摘要 --- p.iv / Chapter Chapter 1 --- Introduction --- p.1 / Chapter Chapter 2 --- Mechanisms of Metallic Deposition and Dendrite Formation of Electro-chemical Deposition (ECD) / Chapter 2.1 --- Introduction --- p.6 / Chapter 2.2 --- Electrochemical Growth on the Cathode --- p.6 / Chapter 2.3 --- Dendritic Formation --- p.13 / Chapter 2.4 --- Conclusion --- p.14 / Chapter Chapter 3 --- "Studies of ""Ramified"" Structures Obtained by Electro-chemical Deposition (ECD)" / Chapter 3.1 --- Introduction --- p.16 / Chapter 3.2 --- Experimental Setup --- p.17 / Chapter 3.3 --- Results and Discussions --- p.21 / Chapter 3.4 --- Dendrite Obtained by Using Very Thin Cells --- p.38 / Chapter 3.5 --- Dendritic Aggregates Obtained by Using Other Cations --- p.44 / Chapter 3.6 --- Conclusion --- p.53 / Chapter Chapter 4 --- Electro-chemical Deposition of metallic Crystals Using Low Potential Difference / Chapter 4.1 --- Introduction --- p.57 / Chapter 4.2 --- Experimental Setup --- p.58 / Chapter 4.3 --- Results and Discussions --- p.60 / Chapter 4.4 --- Conclusion --- p.68 / Chapter Chapter 5 --- Electro-chemical Deposition in a Vertical Cell / Chapter 5.1 --- Introduction --- p.70 / Chapter 5.2 --- Background Theory --- p.71 / Chapter 5.3 --- Experimental Setup --- p.74 / Chapter 5.4 --- Results and Discussions --- p.76 / Chapter 5.5 --- Conclusion --- p.84 / Chapter Chapter 6 --- Interesting Metallic Aggregates Obtained by Electro-Chemical Deposition / Chapter 6.1 --- Introduction --- p.87 / Chapter 6.2 --- Aggregates Obtained from Thin Gap ECD --- p.87 / Chapter 6.3 --- Dendrites Formed from ECD in Bulk Solutions --- p.92 / Chapter 6.4 --- Concluding Remarks --- p.93 / Chapter Chapter 7 --- Future Outlook --- p.95

Foram estudadas as seguintes mesofases liotrópicas tipo I, que se orientam espontaneamente em presença de campo magnético, com o eixo de simetria paralelo ao campo: laurato de potássio/KCl/H2O e decilsulfato de césio/CsNO3/H2O; foi estudada também a mesofase liotrópica laurato de potássio/H2O, que não apresenta a propriedade de orientação magnética espontânea. Foram utilizadas as técnicas da difração de raios-X em alto e baixo ângulos e, de forma acessória, microscopia óptica de luz polarizada, calorimetria diferencial de varredura e criofratura( freeze etching). A mesofases foram acondicionadas em diferentes tipos de porta-amostras com e sem tratamento químico de superfície, submetidas a campos magnético e elétrico, bem como a variações de temperatura. Esse estudo possibilitou a identificação de geometria das unidades difratoras, confirmando o modelo de micelas cilíndricas, para o tipo I, bem como forneceu evidências da influência dos efeitos de superfície e da formação de agregados de micelas com dimensões variadas, que originaram os padrões de difração. Foi confirmada a coexistência das fases hexagonal infinita e tipo I em equilíbrio termodinâmico. Foi construído um modelo de agregados de micelas ajustado aos resultados experimentais do espalhamento de raios-X. A formação desses agregados pode ser explicada pelo balanço das interações atrativa de van der Waals, repulsiva coulombiana e de volume excluído, esta última a partir de considerações sobre a solvatação das micelas de anfifílico no meio aquoso. / We studied the following type I lyotropic mesophases, which are oriented spontaneously in the presence of magnetic field, with the symmetry axis parallel to the field: potassium laurate/KCl/H2O and cesium decilsulfate/CsNO3/H2O; was also studied lyotropic mesophase potassium laurate /H2O, which does not exhibit the property of spontaneous magnetic orientation. We used the techniques of X-ray diffraction at high and low angles, and an ancillary, polarized light microscopy, differential scanning calorimetry and cryofracture (\"freeze etching\").

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Xu Chicheng = 光折变掺铁铌酸锂晶体中的二波耦合和光伏空间孤子 / 徐赤诚. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 113-114). / Text in English; abstracts in English and Chinese. / Xu Chicheng = guang zhe bian shan tie ni suan li jing ti zhong de er bo ou he he guang fu kong jian gu zi / Xu Chicheng. / Acknowledgements --- p.i / Abstract --- p.ii / Table of Contents --- p.v / Chapter Chapter 1 --- Introduction --- p.1 / Chapter Chapter 2 --- Background --- p.5 / Chapter 2.1 --- Band Transport Model --- p.5 / Chapter 2.2 --- Two-wave Mixing --- p.9 / Chapter 2.3 --- Fanning --- p.12 / Chapter 2.4 --- Photovoltaic Effect --- p.16 / Chapter 2.5 --- Spatial Solitons --- p.19 / References --- p.22 / Appendix Refractive Index perturbation in LiNb03 crystal --- p.25 / Chapter Chapter 3 --- Single Laser Beam Interactions with Fe:LiNb03 Crystals / Chapter 3.1 --- Fe:LiNb03 Crystals --- p.30 / Chapter 3.2 --- Interferometric Studies of Refractive Index Perturbations --- p.32 / Chapter 3.3 --- Fanning --- p.47 / Chapter 3.4 --- Self-defocusing --- p.53 / Chapter 3.5 --- Surface Charge Recombination --- p.58 / References --- p.67 / Chapter Chapter 4 --- Photovoltaic Spatial Soliton in Fe:LiNb03 Crystal --- p.69 / Chapter 4.1 --- Introduction --- p.69 / Chapter 4.2 --- Experimental Setup --- p.73 / Chapter 4.3 --- Results and Discussion --- p.75 / Chapter 4.4 --- Conclusion --- p.82 / References --- p.83 / Chapter Chapter 5 --- Two-wave Mixing in Fe:LiNbO3 Crystals --- p.84 / Chapter 5.1 --- Introduction --- p.84 / Chapter 5.2 --- Experimental Setup --- p.87 / Chapter 5.3 --- Results and Discussion I - Without Background Beam --- p.89 / Chapter 5.4 --- Result and Discussion II - With Background Beam --- p.96 / Chapter 5.5 --- Origin of Temporal oscillations during TWM in Fe:LiNb03 Crystal --- p.100 / Chapter 5.6 --- Conclusion --- p.108 / References --- p.109 / Chapter Chapter 6 --- Conclusion and Future Outlook --- p.111

This project was focused on the synthesis of novel phthalocyanines for the construction of porous molecular crystals that incorporate the desirable properties associated with phthalocyanine complexes. Conventional phthalocyanines are relatively insoluble, therefore, remain difficult to process, characterise and effectively crystallise. To counteract this problem, bulky 2,6-di-iso-propylphenoxy substituents were placed around the aromatic core of the phthalocyanine macrocycle and proved to successfully inhibit the co-facial aggregation which limits their solubility. These bulky groups also direct the crystallisation of the phthalocyanine macrocycle inducing a cubic packing arrangement with significant accessible solvent filled voids. The aim of this work was the modification of this 2,6-di-isopropylphenoxy substituted phthalocyanine to enhance the magnetic and catalytic properties and demonstrate its suitability as a platform for creating iso-reticular systems with increased functionality. It was anticipated that mixed double decker complexes of this derivative and another phthalocyanine macrocycle would form crystals with the same cubic spatial arrangement, while maintaining their high catalytic activity or single molecular magnetism behaviour. Firstly, a larger number of transition metals along with some lanthanide metals have been incorporated within this substituted phthalocyanine, extending the previous work on this system. Furthermore, the corresponding contracted macrocycle boron subphthalocyanine was also investigated. While the 2,6-diisopropylphenyl substituents did not greatly affect the electronic properties of the subphthalocyanine, the solid state properties of the material proved interesting. The lanthanide phthalocyanine complexes were further employed in the preparation of lanthanide double decker phthalocyanines that possess single molecule magnetic properties. While retaining this desired property, they also crystallised to produce clathrates with large solvent filled voids. A different double decker complex which contained two iron metal centres bridged by a single nitrogen atom was also prepared from the octa substituted 2,6-di-iso-propylphenoxy phthalocyanine and an unsubstituted phthalocyanine. This nitrido bridged di-iron phthalocyanine complex displayed similar catalytic activity to previously reported systems of this kind and crystallised to afford cubic crystals with large solvent filled voids. These were shown to be accessible by both solvent and ligand exchange. Suitable bidentate ligands for structural stabilisation could be also incorporated. Finally, the preparation of an alternatively substituted phthalocyanine for the construction of a potential porous molecular crystal was studied. By synthesising a hexamethylindan substituted phthalonitrile, it was possible to obtain a soluble phthalocyanine that crystallised to give a clathrate that contained large one-dimensional voids.

Foram estudadas as seguintes mesofases liotrópicas tipo I, que se orientam espontaneamente em presença de campo magnético, com o eixo de simetria paralelo ao campo: laurato de potássio/KCl/H2O e decilsulfato de césio/CsNO3/H2O; foi estudada também a mesofase liotrópica laurato de potássio/H2O, que não apresenta a propriedade de orientação magnética espontânea. Foram utilizadas as técnicas da difração de raios-X em alto e baixo ângulos e, de forma acessória, microscopia óptica de luz polarizada, calorimetria diferencial de varredura e criofratura( freeze etching). A mesofases foram acondicionadas em diferentes tipos de porta-amostras com e sem tratamento químico de superfície, submetidas a campos magnético e elétrico, bem como a variações de temperatura. Esse estudo possibilitou a identificação de geometria das unidades difratoras, confirmando o modelo de micelas cilíndricas, para o tipo I, bem como forneceu evidências da influência dos efeitos de superfície e da formação de agregados de micelas com dimensões variadas, que originaram os padrões de difração. Foi confirmada a coexistência das fases hexagonal infinita e tipo I em equilíbrio termodinâmico. Foi construído um modelo de agregados de micelas ajustado aos resultados experimentais do espalhamento de raios-X. A formação desses agregados pode ser explicada pelo balanço das interações atrativa de van der Waals, repulsiva coulombiana e de volume excluído, esta última a partir de considerações sobre a solvatação das micelas de anfifílico no meio aquoso. / We studied the following type I lyotropic mesophases, which are oriented spontaneously in the presence of magnetic field, with the symmetry axis parallel to the field: potassium laurate/KCl/H2O and cesium decilsulfate/CsNO3/H2O; was also studied lyotropic mesophase potassium laurate /H2O, which does not exhibit the property of spontaneous magnetic orientation. We used the techniques of X-ray diffraction at high and low angles, and an ancillary, polarized light microscopy, differential scanning calorimetry and cryofracture (\"freeze etching\").

Tao, Yin = 納米線在液晶中的動力學 / 陶寅. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references. / Abstracts in English and Chinese. / Tao, Yin = Na mi xian zai ye jing zhong de dong li xue / Tao Yin. / Abstract --- p.I / 摘要 --- p.III / Acknowledgement --- p.IV / List of Figures --- p.VIII / List of Tables --- p.XV / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1. --- Background --- p.1 / Chapter 1.2. --- Review of Liquid Crystals --- p.2 / Chapter 1.2.1. --- Basic concepts --- p.2 / Chapter 1.2.2. --- Physical Properties of liquid crystals --- p.5 / Chapter 1.3. --- Manipulation of nanowires in suspensions --- p.8 / Chapter 1.3.1. --- Longitudinal Anchoring of liquid crystals --- p.8 / Chapter 1.3.2. --- Dielectrophoretic force and torque --- p.12 / Chapter 1.3.3. --- Measurement of conductivity --- p.15 / Chapter 1.4. --- Our motivation and work --- p.17 / Reference --- p.19 / Chapter Chapter 2 --- Experiments --- p.22 / Chapter 2.1. --- Nematic Liquid Crystal Cell Design and Fabrication --- p.22 / Chapter 2.1.1. --- Parallel Plate Capacitor like Liquid Crystal Cell --- p.22 / Chapter 2.1.2. --- In-Plane Switching Liquid Crystal Cell --- p.23 / Chapter 2.2. --- Filling of liquid crystals and dispersing nanowires --- p.28 / Chapter 2.3. --- Measurements --- p.30 / Chapter 2.3.1. --- Measurement of alignment and reorientation of the nanowires --- p.30 / Chapter 2.3.2. --- Measurements of the optical transmittance of liquid crystal cell --- p.31 / Chapter 2.4. --- Experimental Procedures --- p.33 / Chapter 2.4.1. --- Study of the relaxation of liquid crystals and nanowires --- p.33 / Chapter 2.4.2. --- Study of response of liquid crystals and nanowires to applied E field --- p.34 / Reference --- p.35 / Chapter Chapter 3 --- Numerical simulations of the motion of liquid crystals --- p.36 / Chapter 3.1. --- Leslie-Ericsson equation --- p.36 / Chapter 3.2. --- Response and relaxation of liquid crystals --- p.39 / Chapter 3.2.1. --- Parallel plate capacitor like liquid crystal cells --- p.39 / Chapter 3.2.2. --- In-plane switching liquid crystal cells --- p.45 / Reference --- p.49 / Chapter Chapter 4 --- Method of analysis --- p.50 / Chapter 4.1. --- Deduction of the orientation of nanowires --- p.50 / Chapter 4.1.1. --- Parallel plate capacitor like liquid crystal cell --- p.50 / Chapter 4.1.2. --- In-plane switching liquid crystal cells --- p.52 / Chapter 4.2. --- Methods of curve fitting to experimental data --- p.54 / Chapter 4.2.1. --- Procedures of fitting the curves of transmission --- p.54 / Chapter 4.2.2. --- Procedures of fitting the curves of angle β (t) and φ (t)…… --- p.57 / Reference --- p.64 / Chapter Chapter 5 --- Results and discussion --- p.65 / Chapter 5.1. --- Study of the relaxation of nanowires and liquid crystals --- p.65 / Chapter 5.1.1. --- Dependence on the length of nanowires --- p.65 / Chapter 5.1.2. --- Dependence on the temperature of liquid crystals --- p.82 / Chapter 5.2. --- Study of the responses of nanowires and liquid crystals to E field --- p.89 / Chapter 5.2.1. --- Dependence on the applied E field --- p.89 / Chapter 5.2.2. --- Dependence on the length of nanowires --- p.112 / Chapter 5.2.3. --- Dependence on the temperature of liquid crystal --- p.116 / Reference --- p.122 / Chapter Chapter 6 --- Conclusions --- p.123 / Appendix 1 --- p.125 / Appendix 2 --- p.132

Tam, Yiu Ho = 納米線在液晶中的取向研究 / 譚耀豪. / "November 2009." / Accompanying CD-ROM contains data files. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references (leaves 79-83). / Abstracts in English and Chinese. / Library's copy: lacks accompanying CD-ROM. / Tam, Yiu Ho = Na mi xian zai ye jing zhong de qu xiang yan jiu / Tan Yaohao. / Abstract --- p.1 / 摘要 --- p.2 / Acknowledgements --- p.3 / Table of contents --- p.4 / Chapter Chapter 1 --- Introduction --- p.8 / Chapter 1.1 --- Background --- p.8 / Chapter 1.2 --- Review of Liquid crystals --- p.8 / Chapter 1.2.1 --- Molecular structure --- p.8 / Chapter 1.2.2 --- Phases --- p.10 / Chapter 1.2.3 --- Classification of liquid crystalline phases --- p.11 / Chapter 1.2.4 --- Elastic property --- p.12 / Chapter 1.2.5 --- Electrical property --- p.13 / Chapter 1.2.6 --- Optical property --- p.14 / Chapter 1.2.7 --- Alignment methods of liquid crystals --- p.14 / Chapter 1.2.8 --- Dynamics of the director of liquid crystals --- p.15 / Chapter 1.2.9 --- Transmittance calculations --- p.17 / Chapter 1.3 --- Interactions between liquid crystal and nanorods --- p.19 / Chapter 1.3.1 --- Longitudinal anchoring --- p.19 / Chapter 1.3.2 --- Theoretical model of the elastic interaction --- p.20 / Chapter 1.4 --- Motivations --- p.22 / Chapter 1.5 --- Our work --- p.23 / Chapter 1.6 --- Overview of the thesis --- p.23 / Chapter Chapter 2 --- Experiments --- p.24 / Chapter 2.1 --- Cell fabrications --- p.24 / Chapter 2.2 --- Filling of liquid crystal and dispersing nanorods --- p.26 / Chapter 2.3 --- Measurements --- p.27 / Chapter 2.3.1 --- Measurements of alignment and deduction of the orientation of nanorods --- p.27 / Chapter 2.3.2 --- Measurements of the optical transmittance of liquid crystal cells --- p.27 / Chapter 2.4 --- Experimental procedures --- p.29 / Chapter 2.4.1 --- Study of the statics of nanorods and liquid crystal --- p.29 / Chapter 2.4.2 --- Study of the dynamics of nanorods and liquid crystal --- p.30 / Chapter Chapter 3 --- Numerical solutions of the equations of motions --- p.31 / Chapter 3.1 --- Solving procedures --- p.31 / Chapter 3.1.1 --- Conversion of differential equations into difference equations --- p.31 / Chapter 3.1.2 --- Solving algorithm --- p.33 / Chapter 3.2 --- Comparison of numerical and analytical solutions --- p.35 / Chapter 3.2.1 --- Analytic solution of a simplified equation of motion --- p.35 / Chapter 3.2.2 --- Checking for the agreement between the numerical and analytic results --- p.36 / Chapter 3.2.3 --- Checking for the accuracy of the numerical results --- p.39 / Chapter Chapter 4 --- Method of analysis --- p.41 / Chapter 4.1 --- Deduction of the orientation of nanorods --- p.41 / Chapter 4.2 --- Method of curves fitting to experimental data --- p.43 / Chapter 4.2.1 --- Procedures of fitting the transmission curves --- p.43 / Chapter 4.2.2 --- Procedures of fitting the curves of angle ß --- p.44 / Chapter Chapter 5 --- Results and discussion --- p.48 / Chapter 5.1 --- Study of the statics of nanorods and liquid crystal --- p.48 / Chapter 5.1.1 --- Study of the alignment ability of liquid crystal on the nanorods --- p.48 / Chapter 5.1.2 --- Study of the longitudinal anchoring effect of liquid crystal on the nanorods --- p.54 / Chapter 5.2 --- Study of the dynamics of nanorods and the liquid crystal --- p.57 / Chapter 5.2.1 --- Dependence on the length of nanorods --- p.57 / Chapter 5.2.1 --- Temperature dependence on the LC-nanorod interaction --- p.66 / Chapter Chapter 6 --- Conclusions --- p.76 / References --- p.79 / Appendices --- p.84

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