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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 13 of 13 for “"Microstructuring"”.
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Conducting polymer actuator enhancement through microstructuring
Electroactive conducting polymers, such as polypyrrole, polyaniline, and polythiophenes are currently studied as novel biologically inspired actuators. The actuation mechanisms in these materials are based on the diffusion of ions in and out of the polymer film. Giving ions more access to the …
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Laser-assisted surface and domain microstructuring of lithium niobate
This thesis presents the results of investigations into the nano-structuring of lithium niobate using the combined or sequential action of laser light and a chemical etch (a mixture of hydrofluoric and nitric acids). Novel methods to characterise ferroelectric domains using Raman spectroscopy and …
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Microstructuring and domain-engineering of lithium niobate using combinations of light, etching and poling
… presented in this thesis reports methods for microstructuring of lithium niobate. The process of light induced frustrating etching, where light from a laser is used to inhibit the etching of iron doped lithium niobate, is the subject of a detailed investigation so a better understanding of the …
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Self-Replenishing, Wear-Resistant and Anti-Sticking Surfaces Based on Liquid Impregnation of Microstructured Mesoporous α-AI₂O₃ [Alpha Alumina] Matrices
… efficiency may be improved by providing surface microstructuring to MPA samples. Consequently, a fabrication process of large area surface microstructuring the bulk MPA samples was developed using replication and slip casting techniques. The microstructures are first replicated into …
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Investigating Wetting Characteristics on Microstructured Surfaces for Superhydrophobicity and Metal Microcasting
… Surfaces can be rendered superhydrophobic by microstructuring, and superhydrophobic devices could lead to practical corrosion inhibition, self-cleaning, fluid flow control, and surface drag reduction. To more fully understand how liquid interacts with microstructured surfaces, this …
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A study of shape memory polymers and their usage in the development of directional dry adhesives
… and recovery properties of SMPs and surface microstructuring enable highly reversible adhesion strength upon thermo-mechanical loading, and the tilted wedge geometry gives rise not only to its capability for varying adhesion strength based on loading direction, but also the reduction of …
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The stress and strain behavior of materials for energy storage and production
… of fuel cells. In the first section, silicon microstructuring is utilized in order to design structures that can withstand the large volumetric strains associated with forming lithium rich alloys during the normal operation of lithium-ion batteries containing silicon active anodes. A unique …
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Engineering the microfabrication of layer-by-layer polyelectrolyte assembly
The feasibility of microstructuring polyelectrolyte multilayers has been established by using the layer-by-layer assembly technique in combination with patterned self-assembled monolayers (SAMs). SAMs of a carboxylic acid surface (COOH) and a triethylene glycol surface (EG) were used to promote and …
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Investigating wetting characteristics on microstructured surfaces for superhydrophobicity and metal microcasting
… Surfaces can be rendered superhydrophobic by microstructuring, and superhydrophobic devices could lead to practical corrosion inhibition, self-cleaning, fluid flow control, and surface drag reduction. To more fully understand how liquid interacts with microstructured surfaces, this …
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Shape memory polymers as direct contact dry adhesives for transfer printing and general use
… excellent releasability through the use of microstructuring. A method of internally heating the SMP by adding conductive carbon nanoparticles is explored, including quantitative analyses of conductivity and the SMP composite's storage and loss moduli. The resulting flexible and conductive …
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Interactions of single-crystal lithium niobate surfaces with ultra-violet laser radiation
… effective method for topographical surface microstructuring when followed by chemical etching.<br/><br/>The heating of lithium niobate by focussed continuous wave ultraviolet laser light was modelled. It was found that the temperature distributions created were highly localised to the beam …
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Investigations towards the development of a novel multimodal fibre optic sensor for oil and gas applications.
… by modifying the geometrical parameters, and microstructuring the fibre core and cladding. Studies carried out on liquid crystal PCF (LCPCF) identified its enhanced mode confinement characteristics and wavelength tenability features (from visible to near infrared), which can be utilised for …
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Microfluidics at high-intensity X-ray sources: from microflow chips to microfluidic liquid jet systems
… the combination of nanotechnology and microstructuring techniques for developments towards sensoric applications.