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The main purpose of this study is to provide the knowledge and data on the physical, mechanical and nanostructural properties of Acacia mangium wood from Sabah. A further objective was to examine the influence of microfibril angle (MFA) on strength, stiffness, tree age, the distance from pith to bark and the internal structure of the wood and to predict the perfect growth age which produces pure crystalline cellulose and more ordered. The results show that the fully grown which produce fully crystalline cellulose will denote as the optimum age (ao) was found to be 23.45 year for the pith...

Chapter one presents a brief introduction and enunciates the objectives of our investigations also presents a review of the physics of semiconductor nanostructures. chapter two gives details of the etching process, the techniques employed to porous silicon nanostructures, chapter three describes instruments and devices employed in this work.chapter four we have presented the results and discussions of the surface morphology of the reconstructed surfaces etched by photo-electro chemical etching including details The morphological aspects like: pore width, pore shape and wall thickness between...

The purpose of this work to study the porous silicon and fabricate optical sensor based on optimum parameters of PS, chapter one explan the history of PS, chapter two displayed the physical properties of PS and study the Electrochemical etching of porous silicon, Electrical and Photoelectrical Properties, Rapid Thermal Annealing techniques process, and Applications of Porous Silicon. chapter three explain the sample preparation and experiment methodology. chapter four was the characterization of PS using FESEM, AFM, XRD, and Photoluminescence studies before and after annealing, finally PS...