Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"surface characterisation"”.
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Surface characterisation of modified pan based carbon fibres.
This thesis examines the surfaces of polyacrylonitrile (PAN) based high strength (HT) carbon fibres modified by electrochemical and ultra-violet ozone (UV/O3) treatment methods. The surface and bulk study was conducted by x-ray photoelectron spectroscopy, scanning electron microscopy, transmission …
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Surface characterisation with nonlinear methods based on scale analysis
… thesis we develop methods for the analysis of surfaces whose formation processes are not exactly describable. We demonstrate the methods for two examples. The first is a metal surface generated by the processing with a laser device, the second is the electron microscopy image of a cross section …
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The surface characterisation of pharmaceutical mini-tablets using thermal probe techniques
… spatial distribution of components across the surface of pharmaceutical mini-tablets. Such information is of use in formulation development, as the surface is the point at which a solid dosage form comes into contact with the environment, and where drug stability and excipient functionality are …
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Surface characterisation and flotation behaviour of the platinum and palladium arsenide, telluride and sulphide mineral species
… and presents results which characterise the surface properties of synthetic cooperite (PtS), vysotskite (PdS), sperrylite (PtAS2), palladoarsenide (Pd2As), moncheite (PtPd(BiTe)2 and PtTe2) and merenskyite (PdPt(BiTe)2 and PdTe2) and attempts to relate the flotation behaviour of the various …
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Fibre Modification for Concrete Reinforcement using a Novel Atmospheric Microwave Induced Plasma Torch (MIPT)
… a novel microwave induced plasma torch for the surface modification of non-corrosive fibres. The system was developed to reduce the equipment cost, and production time needed in the conventional plasma treatment. To generate a consistent and low-cost microwave plasma jet at atmospheric pressure, …
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Surface functionalisation of encoded SU-8 microparticles and their uses in multiplexed suspension biological assays
… codes. In this thesis, the preparation and surface modification of different diffractive microparticles; the attachment of a range of biological molecules (e.g. proteins and peptides) onto the functionalised surfaces; and different on-bead analytical techniques for surface characterisation …
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Ultrathin films on semiconductor substrates : growth, magneto-optical characteristics and spin injection
… strategy and capabilitiesof this system in surface science studies are described in details in this thesis, as wellas the sample preparation and surface characterisation techniques.The magneto-optical effects were introduced, together with the representations of thepolarisation states …
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Characterisation and modification of hydrogel polymers
… divided into two sections. The first being the characterisation of hydrogel polymers in both their hydrated and dehydrated states and the second some aspects of the structural modification of polymers. The characterisation of hydrogel polymers in their dehydrated state (xerogels) involves such …
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Cellular responses to potential biomaterials
… interdisciplinary study combines the elements of surface characterisation and biological testing to determine the nature of the biomaterial/host interface. Polarity and surface charge were found to have an important influence on fibroblast adhesion to hydrogel polymers, by virtue of their …
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An investigation of thin film magnetic recording media
Mechanical, physical and chemical changes in the surface of commercial thin film metal evaporated magnetic recording media have been correlated to recording error and signal degradation measurements. Modified and adapted commercial Hi-8 video recorders have been used for sample generation whilst …
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New wavelet based space-frequency analysis methods applied to the characterisation of 3-dimensional engineering surface textures.
… to make progress solving real problems of surface texture characterisation. A measurement apparatus like a microscope gives a representation of a surface textures that can be seen as an image. This is actually an image representing the relief of the surface texture. From the image …
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Design and dynamic simulation of mobile manipulators incorporating tribological analysis of 16MnCr5 and EN19 steels.
… model for computing joint torque. Results of surface characterisation carried out using white light interferometry, digital microscopy and scanning electron microscopy substantiate the COF measurements. Microhardness of the surface was also analysed and showed that coatings improved the …
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Cellular interactions with hydrogels
… sequence distribution were found to affect surface properties and this may explain the poor levels of cell adhesion seen on NVP/MMA copolymers. Surface free energy is shown to be dependent on the polar and non polar groups present along the backbone chain of the polymers. Dehydrated and …
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Quantitative characterisation of surface finishes on stainless steel sheet using 3D surface topography analysis
… was to quantitatively characterise the developed surface topography of finishes on stainless steel sheet using three-dimensional surface analysis techniques. At present surface topography is measured using (mainly) stylus profilometry and analysed with 2D parameters, such as Ra, Rq and Rz. These …
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Production of Polyhydroxyalkanoates by Pseudomonas mendocina using vegetable oils and their characterisation
… sodium octanoate as the sole carbon source. Characterisations of the chemical, physical, mechanical, surface and biocompatibility properties of the polymers produced have been carried out by performing different analyses as described in the second chapter of this study. Chemical analysis …
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Understanding how microbial community contributes to wastewater treatment performance in constructed wetlands within Scotch whisky distilleries
… and microbial dynamics of horizontal subsurface flow CWs across different whisky distilleries in Scotland, the research reveals consistent success in dissCu removal throughout the seasons. However, performance variability was observed across seasons for other water quality parameters such …
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Adhesive bonding of stainless steel : strength and durability
… the chemical and physical nature of the adherend surface, the types of structural adhesives, the methods of testing adhesive joints and surface characterisation techniques. The first experimental stage, involved a screening programme to evaluate a number of candidate adhesive systems and adherend …
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Adhesive bonding of stainless steel :Sstrength and durability.
… the chemical and physical nature of the adherend surface, the types of structural adhesives, the methods of testing adhesive joints and surface characterisation techniques. The first experimental stage, involved a screening programme to evaluate a number of candidate adhesive systems and adherend …
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The effects of the surface properties of thermal paper on fingermark visualisation
… X-Ray spectroscopy was used to image the surface of the samples and gain information about the elemental composition of the paper types. From this differentiation of the five thermal papers was possible through analysis of calcium, aluminium and silicon content. By analysing the ratio of …
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Adsorption at Treated Steel-Paint Interfaces
In this thesis, a wide range of surface sensitive techniques have been used to characterise surfaces relevant to offshore steel structures, to provide fundamental understanding of steel-paint binding that prolongs coating lifespans and corrosion inhibition. Particular steel surfaces are …
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