Tsui Wan-lam. / Thesis (M.Phil.)--Chinese University of Hong Kong. / Bibliography: leaves 75-76.

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by Chan Kam Kwong. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references. / Abstract --- p.i / Acknowledgment --- p.iii / Contents --- p.iv / Abbreviation --- p.vi / List of Figures --- p.ix / List of Tables --- p.xii / Introduction --- p.xiii / Chapter 1. --- Basic Theories / Chapter 1.1 --- Static light scattering --- p.1 / Chapter 1.2 --- Dynamic light scattering --- p.11 / Chapter 1.3 --- LLS instrumentation --- p.19 / References --- p.20 / Chapter 2. --- "Light-Scattering Evidence of a ""Critical"" concentration for Polymer Coil Shrinking in Dilute Solution" / Chapter 2.1 --- Introduction --- p.23 / Chapter 2.2 --- Theoretical Background --- p.25 / Chapter 2.3 --- Experimental --- p.30 / Chapter 2.4 --- Results and Discussion --- p.31 / Chapter 2.5 --- Conclusions --- p.37 / Reference --- p.38 / Chapter 3. --- Experimental Study of the Spectral Distribution of the Light Scattered from Flexible Macromolecules in Very Dilute Solution / Chapter 3.1 --- Introduction --- p.40 / Chapter 3.2 --- Theoretical Background --- p.42 / Chapter 3.3 --- Experimental --- p.44 / Chapter 3.4 --- Results and Discussion --- p.45 / Chapter 3.5 --- Conclusions --- p.59 / References --- p.59 / Chapter 4. --- Characterization of Pauci-Chain Polystyrene Microlatices Prepared by Chemical Initiator / Chapter 4.1 --- Introduction --- p.61 / Chapter 4.2 --- Experimental --- p.63 / Chapter 4.3 --- Results and Discussion --- p.64 / Chapter 4.4 --- Conclusions --- p.81 / References --- p.82

by Jim Tsz Fung. / Thesis submitted in 1998. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1999. / Includes bibliographical references. / Abstract also in Chinese. / Abstract --- p.i / Abstract(Chinese) --- p.iii / Acknowledgment --- p.iv / Contents --- p.v / Abbreviations --- p.vii / List of Figures --- p.xi / List of Tables --- p.xvi / Chapter 1. --- Introduction --- p.1 / Chapter 2. --- Theoretical background and instrumentation --- p.8 / Chapter 2.1 --- Static laser light scattering --- p.9 / Chapter 2.2 --- Dynamic laser light scattering --- p.10 / Chapter 2.3 --- Laser light scattering instrumentation --- p.11 / Chapter 2.4 --- Refractive index increment measurement --- p.13 / Chapter 2.5 --- The principle of steady-state fluorescence spectroscopy --- p.14 / Chapter 2.5.1 --- Solvent effects on fluorescence emission --- p.17 / Chapter 2.5.2 --- Excimer --- p.17 / Chapter 2.5.3 --- Characterization of fluorescence emission spectra of pyrene --- p.18 / Chapter 2.6 --- Polymer micronization --- p.20 / Chapter 2.7 --- Enzyme purification --- p.22 / Chapter 3. --- Laser light-scattering study of enzymatic biodegradation of poly(ε-caprolactone) --- p.25 / Chapter 3.1 --- A novel laser light scattering study of enzymatic biodegradation of PCL nanoparticles --- p.26 / Chapter 3.2 --- A modified heterogeneous kinetics for the enzymatic biodegradation of poly(s-caprolactone) in aqueous solution --- p.42 / Chapter 4. --- Laser light-scattering study of enzymatic biodegradation of poly(ethylene oxide-b-ε-caprolactone) diblock copolymer --- p.59 / Chapter 4.1 --- Enzymatic biodegradation of poly(ethylene oxide-b-ε- caprolactone) diblock copolymer and its potential biomedical applications --- p.60 / Chapter A1. --- Static laser light scattering --- p.80 / Chapter A2. --- Dynamic laser light scattering --- p.85

by Mohammad Siddiq. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1996. / Includes bibliographical references (leaves 167-176). / Abstract --- p.I / Acknowledgment --- p.II / Contents --- p.III / Abbreviations --- p.iv / List of Figures --- p.vi / List of Tables --- p.xiv / Chapter 1 --- Introduction --- p.1 / Chapter 2. --- Theoretical background / Chapter 2.1 --- Static light scattering --- p.5 / Chapter 2.2 --- Dynamic light scattering --- p.17 / Chapter 2.3 --- Chain flexibility --- p.25 / Chapter 3. --- Instrumentations / Chapter 3.1 --- Laser Light Scattering (LLS) measurements --- p.34 / Chapter 3.2 --- Refractive index increment --- p.34 / Chapter 3.3 --- Size Exclusive Chromatography (SEC) --- p.37 / Chapter 4. --- LLS Study of Novel Thermoplastics --- p.38 / Chapter 5. --- LLS Study ofPoly(sulfoalkyl Methacrylate)s --- p.96 / Chapter 6. --- LLS Study of soluble Polyimides --- p.112 / Chapter 7. --- LLS and SEC Study of Hydroxy ethyl Cellulose acetates --- p.135 / Chapter 8. --- LLS Study of hydrolyzed and unhydrolyzed polyacrylamides --- p.153 / Chapter 9. --- References --- p.167 / Chapter 10. --- List of Publications --- p.177

by Niu Aizhen. / "Mar., 2001." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

by Iu Chun-ho. / Bibliography: leaves 80-81 / Thesis (M.Ph.)--Chinese University of Hong Kong, 1985

Lau Chin Wa. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references (leaves 77-78). / Abstracts in English and Chinese. / Abstract --- p.i / Chinese Abstract --- p.ii / Acknowledgement --- p.iv / Contents --- p.v / Abbreviations --- p.viii / List of Figures --- p.xiv / List of Tables --- p.xviii / Chapter Chapter 1 --- Introduction --- p.1 / Chapter Chapter 2 --- Basic Principle of Laser Light Scattering and Instrumentation --- p.7 / Chapter 2.1 --- Static laser light scattering (Static LLS) --- p.8 / Chapter 2.2 --- Dynamic laser light scattering (Dynamic LLS) --- p.9 / Chapter 2.3 --- Calibration between translational diffusion coefficient D and molar mass M --- p.10 / Chapter 2.3.1 --- Tranform G(D) to Molar Mass Distributionfw(M) --- p.10 / Chapter 2.3.2 --- Calibration between D and M- Using a set of narrowly distributed standards --- p.12 / Chapter 2.3.3 --- Calibration between D and M- Using two or more broadly distributed samples --- p.12 / Chapter 2.4 --- Data Analysis --- p.14 / Chapter 2.5 --- References --- p.16 / Chapter Chapter 3 --- Experimental --- p.17 / Chapter 3.1 --- Laser Light Scattering Instrumentation --- p.17 / Chapter 3.1.1 --- Overview of laser light scattering spectrometer --- p.17 / Chapter 3.1.2 --- Differential Refractometer --- p.18 / Chapter 3.2 --- References --- p.21 / Chapter Chapter 4 --- Thermally Sensitive and Biocompatible Poly(N-vinylcaprolactam): Synthesis and Characterization of High Molar Mass Linear Chains / Chapter 4.1 --- Introduction --- p.22 / Chapter 4.2 --- Sample Preparation --- p.23 / Chapter 4.3 --- Results and discussion --- p.24 / Chapter 4.4 --- Conclusion --- p.27 / Chapter 4.5 --- References --- p.29 / Chapter Chapter 5 --- Stabilization and destabilization of potassium persulfate (as an initiator) in an surfactant-free water/acetone mixture emulsion polymerization of styrene under microwave irradiation / Chapter 5.1 --- Introduction --- p.41 / Chapter 5.2 --- Experimental --- p.43 / Chapter 5.3 --- Results and discussion --- p.44 / Chapter 5.4 --- Conclusion --- p.51 / Chapter 5.5 --- References --- p.53 / Appendix / Chapter A.l --- Static Laser Light Scattering --- p.66 / Chapter A.1.1 --- Scattering from a small particles --- p.66 / Chapter A.1.2 --- Scattering from a large particles --- p.67 / Chapter A.1.3 --- Scattering by solutions of small molecules --- p.69 / Chapter A.1.3.1 --- Scattering from polymer solutions --- p.70 / Chapter A.2 --- Dynamic laser light scattering --- p.71 / Chapter A.2.1 --- Line-width measurement --- p.73 / Chapter A.2.2 --- Data analysis --- p.75

Wang Chengqing. / "November 2004." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

Chapter 1 briefly introduces the background, problems, applications as well as recent progress of the nanobubbles research. The relationship between the formation/stabilization of nanobubbles and the long-rang structures of water molecules, particularly the restructuring of water molecules at the water/gas interface, are emphasized. / Chapter 2 introduces the theories of static and dynamic light scattering and Zeta-potential measurements as well as the details of the instrument set-up. In this chapter, the fundamental equations of the scattering theory are figured out basis on the quasi-classical electrodynamics and combination of the statistical mechanics as well as molecular dynamic theory. Finally, the statistical properties of photon counting are discussed. / In chapter 3, aqueous solutions of tetrahydrofuran, ethanol, urea and alpha-cyclodextrin were studied by a combination of static and dynamic laser light scattering (LLS). In textbooks, these small organic molecules are soluble in water so that there should be no observable large structures or density fluctuation in either static or dynamic LLS. However, a slow mode has been consistently observed in these aqueous solutions in dynamic LLS. Such a slow mode was previously attributed to some large complexes or supramolecular structures formed between water and these small organic molecules, Our current study reveals that it is actually due to the existence of small bubbles (∼100 nm in diameter) formed inside these solutions. Our direct evidence comes from the fact that it can be removed by repeated filtration and regenerated by air purging. Our results also indicate that the formation of such nanobubbles in small organic molecules aqueous solutions is a universal phenomenon. Such formed nanobubbles are rather stable. The measurement of isothermal compressibility confirms the existence of a low density micro-phase, presumably nanobubbles, in these aqueous solutions. Using a proposed structural model, i.e., each bubble is stabilized by small organic molecules adsorbed at the gas/water interface, we have, for the first time, estimated the pressure inside these nanobubbles. / In chapter 4, by using a combination of laser light scattering (LLS) and zeta-potential measurements, we investigated effects of salt concentration and pH on stability of the nanobubbles in alpha-cyclodextrin (alpha-CD) aqueous solutions. Our LLS results reveal that the nanobubbles are unstable in solutions with a higher ionic strength, just like colloidal particles in an aqueous dispersion, but become more stable in alkaline solutions. The zeta-potential measurement shows that the nanobubbles are negatively charged with an electric double layer, presumably due to the adsorption of negative OTT ions at the gas/water interface. It is this double layer that plays dual roles in the formation of stable nanobubbles in aqueous solutions of water-soluble organic molecules; namely, it not only provides a repulsive force to prevent the inter-bubble aggregation and coalescence, but also reduces the surface tension at the gas/water interface to decreases the internal pressure inside each bubble. / In chapter 5, the addition of salt can induce slow coalescence of nanobubbles (∼100 nm) in an aqueous solution of alpha-cyclodextrin (alpha-CD). A combination of static and dynamic laser light scattering was used to follow the coalescence. Our results reveal that its kinetic and structural properties follow some scaling laws; namely, the average size (<zeta>) of nanobubbles is related to their average mass (<M>) and the coalescence time (t) as <M> <zeta>dr and <zeta> ∼ tgamma with two salt-concentration dependent scaling exponents (df and gamma) For a lower sodium chloride concentration (C NaCl = 40 mM), gamma = 0.13 +/- 0.01 and df = 1.71 +/- 0.02. The increase of CNaCl to 80 mM results in gamma = 0.32 +/- 0.01 and df = 1.99 +/- 0.01. The whole process has two main stages: the aggregation and the coalescence. At the lower C NaCl, the process essentially stops in the aggregation stage with some limited coalescence. At higher CNaCl leads the coalescence after the aggregation and results in large bubbles. / In this thesis, the nanobubbles in the aqueous solutions have been studied by using combination of static and dynamic laser light scattering (LLS), isothermal compressibility measurements and Zeta-potential measurements. We found that the nanobubbles extensively exist in aqueous solutions and the interface of each nanobubble is negatively charged. The addition of electrolytes can destabilize such interface to induce the coalescence of nanobubbles. / Jin, Fan. / "Aug 2007." / Adviser: Chi Wu. / Source: Dissertation Abstracts International, Volume: 69-02, Section: B, page: 1030. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (p. 108). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract in English and Chinese. / School code: 1307.