Materials Literature
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The niobium(V)-2-butylphenoxides of composition [NbCl(OC 6 H 4 C(CH 3 ) 3 -2) 4 ] (I) and [Nb(OC 6 H 4 C(CH 3 ) 3 -2) 5 ] (II) have been synthesized by the reaction of NbCl 5 with Me 3 SiOC 6 H 4 C(CH 3 ) 3 -2 in CCl 4 and have been characterized by elemental analyses, molar conductance, molecular weight determination…
The composites were fabricated by adding 0, 15, 30, 45[vol.%] powders as a second phase to SiC matrix. The physical, mechanical and electrical properties of electroconductive SiC ceramic composites by spark plasma sintering(SPS) were investigated. Reactions between -SiC and were not observed in the XRD and the phase a…
PEMFC stack power output is needed to be around 100 kW to meet the requirements of automotive application and scaling-up the active area of the stack cells will allow a higher power. In the case of scaling-up the active area of cells, it is difficult to obtain uniform in-plane internal conditions such as temperature,…
Semiconductors and related low-dimensional nanostructures are extremely important in the modern world. They have been extensively studied and applied in industry/military areas such as ultraviolet optoelectronics, light emitting diodes, quantum-dot photodetectors and lasers. The knowledge of growth dynamics of semicon…
The composites were fabricated by adding 0, 15, 20, 25[vol.%] Zirconium Diboride(hereafter, ) powders as a second phase to Silicon Carbide(hereafter, SiC) matrix. The physical, mechanical and electrical properties of electroconductive SiC ceramic composites by Spark Plasma Sintering(hereafter, SPS) were examined. Reac…
The knowledge about interactions of different defects in crystalline sillicon are of major importance for the optimisation of the performance of solar cells based on multicrystalline silicon. Due to their recombination activity these defects degrate the lifetime of minority charge carriers and limit the efficiency com…
In the last years it has been widely proven that the introduction of very small amounts of inorganic nanoparticles in polymeric matrices can lead to noticeable improvements of their mechanical properties, in terms of elastic modulus and tensile properties at yield and at break. Linear low density polyethylene (LLDPE)…
The resolution of conventional microscopes is limited by Abbe"s diffraction barrier. The resolution barrier, however, can be fundamentally broken by sequentially switching marker substances in the sample between a detecable on-state and a non-detecable off-state. This can for example be achieved by photoswitching, i.e…
After a general definition of phase change materials and a description of their defining properties, such as the possibility to switch between two room temperature stable phases at high speed and a contrast in optical and electrical properties, the history of phase change research is shortly outlined. In this context…
In this study I have looked at two types of voltage programmable liquid optical device. The first is a rotatable liquid crystal waveplate and the second is an amplitude programmable liquid phase grating. The rotatable waveplate was created by confining a droplet of E7 nematic liquid crystal between two glass substrate…
This dissertation consists of three papers written on supersaturated split-plot designs (SSSPD) and a distribution-free analysis method for data from supersaturated designs. In the first paper, we developed construction methods for SSSPD using an E(S2)-optimal supersaturated design (SSD) as the whole plot design, and…
The (SBN) thin films are deposited on Pt-coated electrode(Pt/Ti//Si) using RF sputtering method at various deposition temperature. The optimum conditions of RF power and Ar/ ratio were 60[W] and 70/30, respectively. Deposition rate of SBN thin films was about 4.17[nm/min]. The crystallinity of SBN thin films were incr…
Bismuth oxide based electrolytes are well known for their high oxide ion conductivity at intermediate temperatures (300-700C). Indeed, the defect fluorite structured -phase of Bi2O3 shows the highest known oxide ion conductivity of any material. Unfortunately this phase is only stable above 730C and much research h…
As the trend continues towards miniaturizing integrated electronic circuits, the need to reduce the size of the antenna continues to be a challenge particularly for the microstrip antenna. Several techniques that have been successfully implemented for size reduction up to 75%, by a variety of methods such as cutting s…
Abstract - The SBN thin films were deposited at substrate temperature of 300[℃] on Pt-coated electrode (Pt/Ti/SiO 2 /Si(100)) using RF sputtering method. The grain and crystallinity of SBN thin films were increased with the increase of annealing temperature. The dielectric constant(150) of SBN thin film was obtained b…
In this study, unlike conventional methods used to grow gas sensor films, a liquidphase deposition method was used to deposit fluorine-doped tin oxide as the sensing material of a gas sensor. Furthermore, silica was doped into the film as an inhibitor to prevent the grain growth of tin oxide during the calcination pro…
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.
Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.
Friction tests were carried out in order to investigate the effects of temperature on the friction and wear behaviors between a PMMA film and a fused silica lens using a microtribometer. The friction forces on the PMMA film were measured under atmospheric condition as the temperature of the film was increased from 300…
Single wall carbon nanotubes (SWNTs) possess impressive mechanical, optical, electrical, magnetic, and thermal properties. Because there exists no general method to disperse individualized SWNTs in wide range of dielectric media, development of SWNT-based materials is severely hampered. As many applications of SWNTs r…