Materials Literature
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Zinc oxide is a popular wide bandgap semiconductor material with versatile electrical and optical properties. In its wurtzite crystal form, this semiconductor is piezoelectric, and has material properties that make it an attractive candidate for fabricating high frequency ultrasound transducers. This thesis describes…
Transition metal oxides (TMOs) exhibit characteristic resistance changes when subjected to high electric fields due to the creation, drift and diffusion of defects, and this resistive-switching response is of interest for future non-volatile memory applications. Indeed, resistive random access memories (ReRAM) are con…
One of the widely discussed problems in the feld of chemoinformatics is the prediction of molecular properties. These properties can range from physical, chemical, or biological properties of molecules to the behaviour or molecules under certain chemical conditions.Traditionally, these properties were calculated using…
Life-extension of EDF Energy's existing nuclear fleet is based on an assumption of continued safe operation. Potential fracture of graphite bricks in the nuclear reactor core of a power station represents an unknown variable in the equation. An understanding of the nature of this phenomenon and the impact on operation…
The advance in transparent electronics requires high-performance transparent conducting oxide materials. The microscopic properties of these materials are sensitive to the presence of defects and interfaces and thus fundamental understanding is required for materials engineering. In this thesis, first principles densi…
Diese Arbeit behandelt den Einfluss der Wassertemperatur auf die Dynamik von einzelnen lasererzeugten Kavitationsblasen sowie den Wärmetransport zwischen Blase und Flüssigkeit während der Blasenschwingung, insbesondere im Blasenkollaps. Im Experiment wird ein Nanosekunden-Laserpuls in eine spezielle temperaturgeregelt…
In this work, the hydrothermal pretreatment under both acidic and alkaline conditions were conducted to study hemicellulose and silica removal from bamboo. In the first part of this work, evolution of proton concentration was examined during both auto- and dilute-acid hydrolysis of hemicellulose from green bamboo. An…
Correction for 'Robust electrochemical metal oxide deposition using an electrode with a superhydrophobic surface' by Jun Zhang, et al., Nanoscale, 2017, 9, 87-90.
Scope and Method of Study: The goal of this work was to develop and demonstrate a 2D dosimetry system based on the optically stimulated luminescence (OSL) from new Al2O3 films for radiotherapy applications. A 2D laser-scanning system was developed for the readout and two OSL films (Al2O3:C and Al2O3:C,Mg) were tested.…
For the development of solid oxide fuel cells (SOFC) and high-temperature electrolysis an electrolyte, which has a high oxygen ion conductivity and a low electronic conductivity, is required. Potential candidates are fluorite-structured oxides such as doped zirconia (ZrO2) and doped ceria (CeO2). The latter allows a r…
Bone Tissue Engineering (TE) has been evolved as a promising mean to repair and regenerate defect and/or diseased bone tissues through the development of artificial extracellular matrix made from biopolymers. Silk fibroin based biomaterials are considered ideal for developing scaffolds for TE applications. The present…
The aim of this work was to carry out research about cost effective ways for synthesising powder metallurgy Ti and Ti alloys. This was done: using low cost Ti powders produced by the hydrogenation dehydrogenation (HDH) method; using induction heating, instead of the more traditionally used electrically heated vacuum f…
Traditional welding, among the many other processes has been given promise to the additive manufacturing industries. Creating models to predict the quality of the manufactured part can be highly beneficial and can create useful knowledge of the process and material. In this thesis, a cold metal transfer (CMT) technolo…
Polymer nanocomposites are manufactured by blending a fraction of nanoparticles into a polymer matrix. A high surface-to-volume ratio of the added nanoparticles leads to a large interphase area in polymer nanocomposites. Structural and dynamic properties of polymer chains in the interphase differ from the bulk behavio…
Die Wechselwirkung von Wassermolekülen mit Festkörperoberflächen ist eine der bedeutendsten Reaktionen in Natur und Technik. Im Fokus dieser Arbeit stehen dabei Tonmineraloberflächen. Tonminerale sind ubiquitär und werden in einer Vielzahl von geotechnischen und technischen Anwendungen eingesetzt. Tonminerale sind nat…
A model for charge diffusion in a monolithic active pixel sensor detector was studied with application to a digital tracking calorimeter, proposed for use in proton computed tomography. The model was implemented in C++, using the ROOT library. The resulting detector response yielded clusters of activated pixels with s…
The exposure of erionite fibres to humans has been unambiguously linked to malignant mesothelio-ma, and in vivo studies have demonstrated that, at present, erionite is the most carcinogenic mineral in the world. Recently, a growing concern has developed regarding the potential risks associated with environmental and o…
Magnesium alloys are of emerging interest in the automotive, aerospace and electronic industries due to their light weight, high specific strength, damping capacity, etc. However, practical applications are limited because magnesium alloys have poor formability at room temperature due to the lack of slip systems and t…
Moisture induced damage, in the form of loss of materials under traffic has been an ongoing problem in a few Hot Mix Asphalt (HMA) pavements for Maine Department of Transportation (DOT). A research study was initiated to determine a suitable method to identify moisture susceptible mixes through testing during mix desi…
Modern devices require fundamental length scales to be analysed in a maximum detail to enable research of new types of phenomena and design new materials. In this thesis, an advancement in Lorentz microscopy will be presented where the focus was placed not only onto resolution in spatial space but also onto resolution…