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Showing 1 to 20 of 555 for “"SiO2"”.
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Study of Si/SiO2 interface passivation and SiO2 reliability on deuterium implanted silicon
One of the major defects that contribute to the interface states in the silicon band gap is the dangling bond, which degrades performance of MOS devices. Passivation of these bonds with hydrogen had been found to diminish their effect but the improvement degrades the operation due to hot electron …
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TiN/HfO2/SiO2/Si gate stacks reliability : Contribution of HfO2 and interfacial SiO2 layer
Hafnium Oxide based gate stacks are considered to be the potential candidates to replace SiO_2 in complementary metal-oxide-semiconductor (CMOS), as they reduce the gate leakage by over 100 times while keeping the device performance intact. Even though considerable performance improvement has been …
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The Si/SiO2 Interface Roughness
The Si/Si02 interface roughness has important effects on the performance of metal-oxide semiconductor field effect transistor devices, which dominate contemporary integrated circuit technology. There have been intense efforts to study this system due to its importance. In this work, a new …
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Electrical conductivity in the FeO·Fe2O3-Al2O3-SiO2 system.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
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Nonlinear and linear optical studies of Si-SiO2 interfaces
Contains fulltext : mmubn000001_254659667.pdf (Publisher’s version ) (Open Access)
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Manganese promotion of a Co/SiO2 Fischer-Tropsch catalyst
… of manganese into cobaltbased/silica (SiO2) catalyst influences the activity and selectivity of the FischerTropsch synthesis via the enhancement of CO adsorption and dissociation. The base catalyst is prepared by impregnation (IMPR) of the SiO2 support with cobalt(II) nitrate …
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Solid state interaction between thin metal films and SiO2 substrate.
Thin films of Cu, Ir, Mo, Pt, Re, Y, Yb and Zr were vacuum deposited onto Si02 substrates of thermally oxidized Si< 100 > wafers and were annealed in a vacuum tube furnace. Samples were then analysed using Rutherford Backseattering Spectrometry (RBS) and X-Ray Diffraction (XRD) to determine whether …
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Synthesis and Properties of ordered Mesoporous SiO2-CaO Bioactive glasses
In this project, highly ordered mesoporous SiO2 a?? CaO bioactive glasses were successfully synthesized via surfactant templating route. The formation and bioactivities of the ordered mesoporous bioactive glasses were investigated systematically. In order to investigate the effects of the ordered …
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Entwicklung hochfester Net shape Oxidkeramiken im System Al2O3-SiO2-ZrO2
… Oxidkeramiken im System <br>Al2O3-SiO2-ZrO2 entwickelt, bei dem als reaktive <br>Komponenten anstatt der reinen Metalle intermetallische Verbindungen <br>wie ZrAl3, ZrSi2 und Zr2Si verwendet werden. <br> <br>Während des Reaktionssinterns in Umgebungsluft werden die …
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Fischer-Tropsch synthesis over SiO2, ZnO and MnO supported cobalt catalysts
Silica is well known as a support for cobalt supported Fischer-Tropsch catalysts. Silica has a high surface area with an amorphous structure that promotes dispersion of the active cobalt phase over the support surface. This dispersion is vital in terms of catalyst performance and derives from the …
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Diversity of compressional mechanisms among SiO2 polymorphs : case of coesite and cristobalite
Silica, SiO2, exists in a wide range of pressure and temperature conditions, accommodating its simple chemical composition by numerous polymorphs. More than 30 stable or metastable phases of silica are known, most of which occur at ambient to moderate pressures (<9 GPa). Understanding polymorphism …
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Tailoring Local Conductivity by the Formation of Ag Nanoclusters in SiO2 Xerogel Films
<p>Porous silicon dioxide thin films were produced via dip-coating and doped with Ag+ by adding AgNO3 to the dipping solution. Nanoparticles were formed within the pores of these films by UV exposure. Nanoparticle formation was confirmed by UV-visible spectroscopy and Transmission Electron …
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Laser produced SiO2/TiO2 coating on stainless steel substrate with sol-gel processes.
… M. Atik and his colleagues reported that SiO2-TiO2 sol-gel film was deposited on stainless steel (SS 316L) by furnace treatment for corrosion protection. Furnace heating as the densification of sol-gel coating film has, however, the disadvantages such as the limitation of sample size due …
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Interactions of hydrogen with alkali promoted Ru/SiO2 catalysts: a proton NMR study
<p>The work completed for this dissertation has endeavored to characterize alkali promoted Ru/SiO[subscript]2 catalysts. Initial work investigated the role of hydrogen spillover to the silica support on the characterization of the active metal sites via a hydrogen chemisorption technique. A …
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Vibrational dynamics in strong glasses: the cases of densified v-SiO2 and v-SiSe2
In this work we will face the problem of the vibrational properties of glasses focusing on the origin and nature of the boson peak (BP). This feature is an universal characteristic of glasses and a fingerprint of the presence of disorder. Two samples have been chosen for this study. The first is …
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Growth and chemical characterisation studies of Mn silicate barrier layers on SiO2 and CDO
… layer on both a 5.4 nm thick thermally grown SiO2 and a low dielectric constant carbon doped oxide (CDO), with the focus of understanding the barrier formation process. The self forming nature of this diffusion barrier layer resulting from the chemical interaction of deposited Mn with the …
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