Materials Literature
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In the work, we studied and compared the microstructures of commercially pure copper subjected to the same strain at room temperature and at liquid-nitrogen temperature. It is found that at rather low plastic strain (slump, e=1.0), cryogenic temperature assists the activation of mechanical twinning and somewhat accele…
The processes of silicon nanocrystals (Si–NCs) growth on both SiO2 and Si3N4 substrates by low pressure chemical vapor deposition have been systematically investigated. A two-step process was adopted for Si–NCs growth: nucleation at a high temperature (580–600 °C) and growth at a low temperature (550 °C). By adjusting…
Thesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2011-01-28 10:49:47.118
In this study, the effects of an annealed buffer layer with different thickness on heterojunction diodes based on the ZnO/ZnO/p-Si(111) systems were reported. The effects of an annealed buffer layer with different thickness on the structural, optical, and electrical properties of zinc oxide (ZnO) films on p-Si(111) we…
In relation to a possible cable pathway on the sea floor through the inner half of the Hardanger fjord, the Institute for Marine Research has carried out ROV inspections of the benthic faunal communities along 17 selected bottom transects. The surveyed area was restricted to the inner half of the Hardanger fjord – fro…
Aim of the research project is the investigation of the role played by molecular interactions on the linear and non-linear optical properties in dimeric structures. In particular the two-photon absorption and the excited state dynamic in different dimeric structures is studied, in order to observe to which extent dime…
It describes each component element of Chinese ink painting in detail. Firstly, this paper presents brush emulation based on physical calculation. The brush model comprises a spine skeleton wrapped up a smooth surface which can be deformed through constrained energy minimization. The model can bend the skeleton and ch…
The effect of nanosecond pulsed laser excitation on surface diffusion during growth of Ge on Si(100) at 250 degrees C was studied. In Situ reflection high-energy electron diffraction (RHEED) was used to measure the surface diffusion coefficient while ex situ atomic force microscopy (AFM) was used to probe the structur…
The knowledge of the microstructural properties of cement-based materials plays a fundamental role in predicting their macroscopic behaviour in terms of performance and durability. However, due to the intrinsic microstructural and chemical complexity of such materials, a multi-disciplinary approach is often required.…
For simulating catalytic oxidation of CO on platinum-group metals, asynchronous cellular automata with probabilistic transition rules (kinetic CA) are used being sometimes refereed to as Monte Carlo methods. Based on the properties of catalytic surface kinetic CA has to have a huge cellular arrays and very long evolut…
In this work, was studied the formation of a composite of the refractory metal niobium with copper, through the process of high-energy milling and liquid phase sintering. The HEM can be used to synthesize composite powders with high homogeneity and fine size particle distribution. It may also produce the solid solubil…
Lead titanate (PbTiO 3 ) powder was prepared from lead nitrate (Pb(NO 3 ) 2 ) and titania (TiO 2 ) by hydrothermal route. Phase formation process was investigated by observing the phases formed in various experimental conditions like different KOH concentration, reaction temperature and time. PbTiO 3 powder was fabric…
U radu je istaknuto da je postupak modeliranja i predviđanja cvrstoce vlaknima ojacanih polimernih laminata, zbog njihove anizotropije vrlo složen. Teskoce su osobito izražene u predviđanju ekvivalentnog naprezanja, odnosno cvrstoce laminata pri složenom opterecenju. Prikazan je model određivanja cvrstoce pri složenom…
Lentinan a polysaccharide from medicinal mushroom that is Lentinus has been known to have anticancer properties. Telomerase activity is not observed in normal healthy cells, where as in cancerous cells telomerase expression is high. Telomerase represents a promising cancer therapeutic target. We investigated the inhib…
In this work, system identification method is used to capture the reactor characteristics of production rate of polyethylene (PE) based on published experimental data. The identification method is used to measure the percentage effect on the production rate of PE by measuring the effect of input factors of temperature…
Exact, contact-free and non-destructive optical analysis of semiconducting layers is advantageous for thin-film solar cell applications. A non-numerical theoretical model has been developed to extract approximation-free optical and electrical data from UV/visible (Vis)/near infra-red (NIR) spectra. Special focus has b…
First page of article Keywords: Fluorine, Hydrogen Fluoride and Hydrofluoric Acid; Structural steels with up to 12 % chromium
The r eaction kinetics of diethyl sulfide (C 2H5 -S-C2H5 ) and ethyl methyl sulfide (C2H5 -S-CH3), simulants for the chemical warfare agent, sulfur mustard (ClC 2H4 -SC2H4Cl), was studied at high temperatures under highly diluted conditions. This work has been undertaken with the goals to understand the destruction of…
Cover: A sketch map is exhibited to simulate the morphology of block copolymer dispersed in a well-ordered nanorod array on a planar plate. Some novel factors, such as the inducing height of nanorod and its grafting density were investigated, as shown in the snapshots. Simulated X-ray scattering witnessed the pattern…
Gallium Nitride is a III-V compound semiconductor that has attracted a lot of interest among both applied and basic researchers because of its potential applications in optoelectronic, high power and high frequency devices. However, many questions about the material remain unanswered. In this thesis, we will present o…