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Showing 1 to 20 of 315 for “"SIO"”.
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The Si/SiO(2) Interface Roughness
The Si/SiO$\sb2$ 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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Beiträge zur Chemie des höherkoordinierten Siliciums: Synthese, Struktur und Eigenschaften neuer Silicate mit SiO 3 C 2 -, SiO 4 C -, SiO 5 - und SiO 6 -Gerüst, Beiträge zur Chemie des tetrakoordinierten Siliciiums: Synthese, Struktur und Eigenschaften von Silanen, Silanolen und Siloxanen
… eines zwitterionischen l5Si-Silicates mit SiO3C2-Gerüst. In siedendem Acetonitril konnte 8 unter Methan-Abspaltung zum bekannten zwitterionischen l5Si-Spirosilicat 9 umgesetzt werden. 7.2 Synthese und Charakterisierung anionischer l5Si-Silicate und dianionischer l5Si,l5Si’-Disilicate mit …
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Electron tunneling processes in Si/SiO₂ systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Optical absorption of bismuth silicon oxide (Bi₁₂SiO₂₀) crystals
… optical absorption in bismuth silicon oxide (Bi₁₂SiO₂₀) crystals grown using the Bridgman technique and to identify electronic transitions responsible for absorption. Optical measurements were taken in the range of 0.4 - 11 pm at 300 K and 77 K using a spectrometer. The results show that near the …
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Controlling the assembly of proteins and cells on SiO₂ surfaces
… on the development of ultrathin films of PEG on SiO₂ surfaces that 1) can resist the nonspecific adsorption of proteins and cells ("bioinert surfaces ") and 2) can provide surface sites for the specific immobilization of biomolecules ("bioactive surfaces "). Effective methods to achieve these …
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Computational Modeling of a-SiO₂ Nanoparticles and their Electronic Structure Calculation
The spherical amorphous silica (a-SiO₂) nanoparticles (NPs) are constructed from a previous continuous random network (CRN) model of a-SiO₂ with the periodic boundary. The models of radii 12 Å, 15 Å, 18 Å, 20 Å, 22 Å, 24 Å and 25 Å are built from the CRN structure. Then, three types of models are …
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Deposition of Au/Pt on Co/SiO 2 for Fischer-Tropsch synthesis
… to effect the Co3O4 crystallite size (i.e. dispersion) and intrinsic activity of these catalysts [3]. These promoted catalysts are typically prepared by co-impregnation [4] or sequential impregnation [5, 6] with a noble metal precursor. This study investigates the preparation of cobalt …
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Electrical study of molybdenum in silicon and fluorinated SiO₂ for interlayer dielectrics
… was 5.5x10·16cm2. At high temperatures, the diffusion behavior of molybdenum exhibited a Gaussian profile. At low temperatures, however, the profiles exhibited an initial kick-out mechanism followed by normal diffusion. Fluorinated SiO2 is becoming an extremely important material for intermetal …
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Micro-fabrication of 3-D Si/air and Si/SiO₂/air PBG structures
Thesis (Elec. E.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998; and, Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Effects of flow on the activity of a WO₃-SiO₂ olefin disproportionation catalyst
This investigation consisted of a study of the effects of the reactant flow rate on the activity of a tungsten oxide on silica catalyst during propylene disproportionation. A 10 percent tungsten oxide on silica catalyst (223 square meters per gram B.E.T. surface area) was used in a microcatalytic …
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Peculiarities of crystal and magnetic structures of synthetic Co-olivine, Co 2 SiO 4
Compounds of the chemical formula M2SiO4 with olivine-type structure are of fundamental importance for geologists and mineralogists because of the presence of a huge amount of the olivines in the earth's upper mantle. Here, M is mainly Fe, Mg and Mn with small amounts of Ni, Ca, Co and Zn in mixed …
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