by Cheng Koon Chuen, Louie Mei Po. / Thesis (M.B.A.)--Chinese University of Hong Kong, 1998. / Includes bibliographical references (leaves 46-49). / ABSTRACT --- p.ii / TABLE OF CONTENTS --- p.iii / LIST OF TABLES --- p.v / Chapter / Chapter I --- INTRODUCTION --- p.1 / Chapter II --- LITERATURE REVIEW --- p.4 / Abnormal Returns --- p.5 / Information Signal --- p.6 / Impact on Liquidity --- p.8 / Impact on Volatility --- p.9 / Impact on Risk --- p.10 / Managerial Motives --- p.11 / Trading Range --- p.12 / Signalling --- p.13 / Liquidity --- p.13 / Other Motives --- p.14 / Research Findings --- p.14 / Chapter III --- DATA DESCRIPTION --- p.18 / Chapter IV --- METHODOLOGY --- p.21 / Shareholder Wealth Effects --- p.21 / Changes of Volatility --- p.23 / Change of Risk --- p.25 / Interview --- p.26 / Interviewees --- p.26 / Interview Schedule --- p.26 / Chapter V --- RESULTS --- p.28 / Shareholder Wealth Effects --- p.28 / Volatility Changes After Splits --- p.29 / Beta Changes Around Splits --- p.29 / Interview Results --- p.30 / Managerial Motives --- p.30 / Market Comments --- p.35 / Chapter VI --- CONCLUSION --- p.39 / APPENDIX --- p.41 / BIBLIOGRAPHY --- p.46

Hydrogen has been identified as a potential energy carrier due to its high energy capacity and environmental harmlessness. Compared with hydrogen production from hydrocarbons such as methane and naphtha in a conventional hydrogen energy system, photocatalytic hydrogen evolution from water splitting offers a more economic approach since it utilizes the abundant solar irradiation as energy source and water as initial reactant. Powder photocatalyst, which generates electrons and holes under illumination, is the origin where the overall reaction happens. High solar energy conversion efficiency especially from visible range is commonly the target. Besides, cocatalyst for hydrogen and oxygen evolution is also playing an essential role in facilitating the charge separation and enhancing the kinetics. In this thesis, the objective is to achieve high energy conversion efficiency towards water splitting from diverse aspects. The third chapter focuses on a controllable method to fabricate metal pattern, which is candidate for hydrogen evolution cocatalyst while chapter 4 is on the combination of strontium titanium oxide (SrTiO3) with graphene oxide (GO) for a better photocatalytic performance. In the last chapter, photoelectrochemical water splitting by Ta3N5 photoanode and FeOOH as a novel oxygen evolution cocatalyst has been investigated.

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Thesis (M.B.A.)--University of Hong Kong, 1983.

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The role of high doping levels and the interfacial structure on the junction behavior between n-type silicon microwires and the conducting polymer, PEDOT:PSS, was investigated using tungsten probes, an established technique for Ohmic contact to individual microwires. The resistance and the doping density of carriers as a function of length along each microwire as well as the junction resistance between individual microwires and the conducting polymer were characterized by making Ohmic contact to microwires. The junction between highly-doped n-Si microwires and the conducting polymer had relatively symmetric current-voltage characteristics and a significantly lower junction resistance as compared to low-doped microwires. The current-voltage response of junctions formed between the polymer and low-doped microwires, which still incorporated the metal catalyst used in the growth process, was also studied. Junctions incorporating copper at the interface had similar current-voltage characteristics to those observed for the highly-doped microwire, while junctions incorporating gold exhibited significantly lower resistances