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, Xiaohui. / "November 1999." / Thesis (Ph.D.)--Chinese University of Hong Kong, 1999. / 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 theoretical background of the association and dissociation of polymer chains or colloidal particles are briefly introduced, including thermodynamic consideration and viscoelastic effect on the formation of mesoglobular phase in dilute polymer solutions, as well as some basic theories and universal models of fractal aggregates. / Chapter 2 details the theories of static and dynamic laser light scattering (LLS) as well as the instrumental set-up. In addition, the invention and set-up of differential refractometer are briefly discussed. / Chapter 3 summarizes laser light-scattering (LLS) and stopped-flow studies of association of cyclic- and linear-poly( N-isopropylacrylamide) (c-PNIPAM and l-PNIPAM) chains in dilute aqueous solutions. Dynamic and static LLS results reveal that the heating leads to a microphase transition. Resultant structures of interchain aggregates depend on the heating rate and the chain structure. In comparison with l-PNIPAM chains, a slow heating of c-PNIPAM chains in the solution results in stable mesoglobules with a lower average aggregation number, a looser structure and a smaller average size (∼290 nm). The temperature-jump induced association of c -PNIPAM chains in the stopped-flow measurement reveals two kinetic stages; namely, the loose packing of contracted c-PNIPAM chains and further contraction-induced fragmentation of initially packed c-PNIPAM chains due to the lack of interchain entanglements. On the other hand, for l-PNIPAM chains, the intrachain contraction and interchain penetration/entanglement simultaneously occur as the temperatures increases, leading to larger and more compact aggregates whose size increases with the solution temperature. / Chapter 4 discusses the association of water-soluble PNIPAM-monolayer-protected gold particles in dilute dispersions induced by heating the dispersions to different final temperatures higher than the lower critical solution temperature (LCST) of PNIPAM chains via the slow and fast processes. LLS was used to trace and characterize the association process, supplemented by transmission electron microscopy (TEM) measurements. The slow heating-and-cooling cycle reveals that the association and dissociation of PNIPAM-protected gold nanoparticles can be easily induced by altering the solution temperatures and the association and dissociation are fully reversible. Fast heating the dispersion to three different temperatures reveals that both the aggregation rate and average aggregation number increase with the dispersion temperature. Furthermore, the fast heating leads to the formation of fractal aggregates. The fractal dimensions of such formed aggregates continuously increases as the time evolves, which can be ascribed to the simultaneous dissociation that leads to the restructuring and rearrangement of the aggregates, resulting in denser structures. It is interesting to note that the structure of aggregate always remains fractal during the whole process. / Chapter 5 shows how water-dispersible nanosized semiconductor CdS particles (quantum dots, QDs) can be synthesized with a protective layer of covalently grafting linear thermally sensitive PNIPAM chains as well as how these CdS particles can be induced into reversible association and dissociation via an alteration of the dispersion temperature. The formation and fragmentation of these QDs aggregates were systematically investigated by laser light scattering (LLS) and confirmed by transmission electron microscopy (TEM). There exists a hysteresis in one heating-and-cooling cycle. The CdS particles stabilized with shorter PNIPAM chains (Mn = 15,000 g/mol) can associate to form larger and denser spherical aggregates with a much higher aggregation number than those grafted with longer PNIPAM chains ( Mn = 31,000 g/mol) in the heating process. The dissociation (fragmentation) in the cooling process has two stages: initially, the aggregates dissociate as the temperature decreases, and then, the fragmentation stops over a wider temperature range before its final complete dissociation at a lower temperature. We attribute such a two-stage fragmentation to a balanced effect of inter- and intra-chain hydrogen bonding as well as to the hydrophobic interaction between PNIPAM chains and CdS particles. / In this Ph.D. thesis, temperature-induced association and dissociation of various polymeric systems were systematically investigated by a combination of static and dynamic laser light scattering (LLS), supplemented by other methods, such as stopped-flow temperature jump, transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FTIR). / Ye, Jing. / Adviser: Wu Chi. / Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3533. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references. / 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. / Abstracts in English and Chinese. / School code: 1307.

by Yubao Zhang. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1996. / Includes bibliographical references (p. 138-146). / 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.

Dai, Zhuojun. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references. / Abstracts in English and Chinese. / 摘要 --- p.i / ABSTRACT --- p.iii / ACKNOWLEDGEMENT --- p.v / Chapter Chapter 1 --- Introduction and Background --- p.-1- / Chapter 1.1 --- General introduction to internal motions --- p.-1- / Chapter 1.1.1 --- Definition of translational diffusion and internal motions --- p.-1- / Chapter 1.1.2 --- Theoretical background of internal motions --- p.-1- / Chapter 1.2 --- Investigation of internal motions on LLS --- p.-4- / Chapter 1.2.1 --- General introduction on investigation of internal motion by LLS --- p.-4- / Chapter 1.2.2 --- Theory on internal motion detected by LLS --- p.-5- / Chapter 1.3 --- Laser light scattering --- p.-6- / Chapter 1.3.1 --- General introduction to laser light scattering --- p.-6- / Chapter 1.3.2 --- Data process about internal motions in LLS --- p.-9- / Chapter 1.4 --- Notes and References --- p.-12- / Chapter Chapter 2 --- Internal motions of PNIPAM chains in 6 and bad solvent --- p.-15- / Chapter 2.1 --- Introduction --- p.-15- / Chapter 2.2 --- Experimental section --- p.-15- / Chapter 2.2.1 --- Sample preparation --- p.-15- / Chapter 2.2.2 --- Dynamic laser light scattering --- p.-16- / Chapter 2.3 --- Result and discussion --- p.-16- / Chapter 2.4 --- Conclusion --- p.-23- / Chapter 2.5 --- Notes and References --- p.-25- / Chapter Chapter 3 --- Internal motions of PNIPAM microgels in 6 and bad solvent --- p.-26- / Chapter 3.1 --- Introduction --- p.-26- / Chapter 3.2 --- Experimental section --- p.-26- / Chapter 3.2.1 --- Sample preparation --- p.-26- / Chapter 3.2.2 --- Dynamic laser light scattering --- p.-21- / Chapter 3.3 --- Result and discussion --- p.-27- / Chapter 3.4 --- Conclusion --- p.-30- / Chapter 3.5 --- Notes and References --- p.-31- / Chapter Chapter 4 --- Examination on the internal motions variations with solvent quality of Polystyrene chains --- p.-32- / Chapter 4.1 --- Introduction --- p.-32- / Chapter 4.2 --- Experimental Section --- p.-32- / Chapter 4.2.1 --- Sample preparation --- p.-32- / Chapter 4.2.2 --- Dynamic laser light scattering --- p.-33- / Chapter 4.3 --- Result and discussion --- p.-33- / Chapter 4.4 --- Conclusion --- p.-36- / Chapter 4.5 --- Notes and References --- p.-38- / Chapter Chapter 5 --- Examination on the internal motions variations with solvent quality of Poly(methyl methacrylate) chains --- p.-40- / Chapter 5.1 --- Introduction --- p.-40- / Chapter 5.2 --- Experimental Section --- p.-40- / Chapter 5.2.1 --- Sample preparation --- p.-40- / Chapter 5.2.2 --- Dynamic laser light scattering --- p.-41- / Chapter 5.3 --- Result and discussion --- p.-41- / Chapter 5.4 --- Conclusion --- p.-45- / Chapter 5.5 --- Notes and References --- p.-46-

No description available.

Thesis (PhD)--University of South Australia, 1996

Thesis (Ph.D.) -- McMaster University, 1998. / Includes bibliographical references (leaves 139-148). Also available via World Wide Web.

Thesis (M. Sc.)--University of Canterbury, 2008. / Typescript (photocopy). Includes bibliographical references (p. 109-113). Also available via the World Wide Web.

Thesis (M.S.)--Florida State University, 2004. / Advisor: Dr. Qi Wang, Florida State University, College of Arts and Sciences, Dept. of Mathematics. Title and description from dissertation home page (viewed Sept. 27, 2004). Includes bibliographical references.