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  • 2005-2009  (7)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of Nano-Sized Co-Sb Compounds through Solvothermal Routes (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 136 (Feb. 2008), p. 57-62 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Skutterudite materials have received great attention because their promising propertiesfor thermoelectric (TE) applications. Among the family of skutterudites, CoSb3 has been intensivelyinvestigated due to its large electrical conductivity and Seebeck coefficient. However, its thermalconductivity is too high to make it an effective TE material. Nanostructuring of CoSb3 has thedesirable effects of reducing its lattice thermal conductivity as the point imperfections or grainboundaries can scatter phonons (heat carrier) more effectively than electrons (charge carrier). In thisstudy, nanostructured CoSb3 was synthesized by solvothermal routes using CoCl2·6H2O and SbCl3as precursors dissolved in anhydrous ethanol with the reaction temperature kept at 240°C. Inaddition to the CoSb3 phase, other Co-Sb compounds were also formed during the reaction process.In this paper, we investigated the effects of processing parameters, such as concentration ofCoCl2·6H2O, SbCl3 and NaBH4 in ethanol and thermal duration of solvothermal synthesis, on theyield of CoSb3 phase
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.136.57.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A Study on the Electrodeposition Behavior of Cobalt Antimonides in Citric Based Solutions (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 136 (Feb. 2008), p. 75-82 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Thermoelectric (TE) materials are attracting renewed attention for clean energyconversion. Reducing the dimension of materials to 2D/1D (e.g. thin film and nanowire) is onemajor approach to achieve high figure of merit (ZT) in the existing TE materials system.Electrodeposition has been widely used in fabricating various low dimensional TE materials.However, electrodeposition behavior of CoSb3 skutterudites is rarely reported. In this work, wereport the co-deposition behavior of cobalt and antimony in citric based solutions byelectrodeposition. The effects of deposition potential and concentration of cobalt and antimonycontaining precursors were studied. The focus of the study will be on the crystalline properties andchemical composition of the deposited films
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.136.75.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Simulation of the Growth of Copper Films for Micro and Nano-Electronics (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advances in science and technology Vol. 51 (Oct. 2006), p. 167-173 
    Details
    ISSN: 1662-0356
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Natural Sciences in General , Technology
    Notes: Copper is a desirable material to replace aluminum-based alloys in the metallization ofvery large-scale integrated circuits, due to its high conductivity and reduced electromigration.However, practical ways to grow high quality copper layers on top of the common materials used asbarrier layers on silicon is problematic, because of several issues, like poor adhesion and reducedcoverage of high aspect-ratio surface features. We will describe efforts in developing proceduresand chemical compounds for the growth of high quality films of copper on barrier layers. Our workis based on ab-initio calculations of the energetics and dynamics of the growth processes involved,including the interaction of the chemicals with the surfaces. The calculations presented use densityfunctional theory, and in particular the SIESTA code
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.51.167.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Wear Characteristics of the Sub-Aperture Tools and Material Removal Rate in Precision Grinding with Loose Abrasives (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 69-74 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper proposes a sub-aperture grinding tool for loose abrasive computer controlledsurfacing, which is designed to perform epicyclic motion and rotate around its centre at a rapid rate,whilst the entire mechanism revolves around a secondary centre at a slower rate. In actual process,the wear of the tool could affect the material removal function, and make the process unstable, thusin fact, it is difficult to make a deterministic manufacturing. The focus of the present paper is onwearing characteristics of sub-aperture tools and the wear evenness as the main objectives. To makea further study, material removal function of the tool is firstly established through theoreticallymodelling, next, a correlative function with weighted factors is built, which is suitable forspecifying the wearing degree of the tool. Finally, to discover the relationship between the materialremoval rate and the tool wearing characteristics, and to optimize the grinding process, analysis andexperiments are then carried out on a K9 glass specimen by means of three kinds of tool materials,i.e., polyurethane pad, aluminum plate and pitch based on the proposed technique and model. Theresults indicated that the required high efficiency and precision could be achieved by choosingproper processes
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.69.pdf
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The Solving Methods of Dwell Time or Pressure in CCOS for Optical Complex Surfaces (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 669-672 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Error correction of optical complex surfaces in computer-controlled optical surfacing(CCOS) is primary important. This paper discusses some methods, i.e. Fourier transform method,Wiener filtering method, directive method and iterative method, for calculating dwell time or relativepressure in the CCOS for error-correcting, which are enlightened from the digital image processingtechniques. However, these error correction methods are different from the image processing becausethey are not a subject of solving the causal signal but a problem of an iterative process. The simulationresults show that the Wiener filtering method is good and reliable when the correlative parameters inthe fabrication are kept consistent
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.669.pdf
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Esomeprazole 40 mg twice daily in triple therapy and the efficacy of Helicobacter pylori eradication related to CYP2C19 metabolism (2005)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 21 (2005), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aim : To determine whether an increased dosage of esomeprazole 40 mg twice daily in triple therapy improved the Helicobacter pylori eradication rate for patients with different genotypes of S-mephenytoin 4′-hydroxylase (CYP2C19).Methods : Two hundred H. pylori-infected dyspeptic patients were randomized to receive clarithromycin 500 mg twice daily and amoxicillin 1 g twice daily plus either omeprazole 20 mg or esomeprazole 40 mg twice daily for 1 week. Six weeks later, the success of H. pylori eradication was defined. The genotyping of CYP2C19 in each patient was defined as homologous, heterologous extensive metabolizer or poor metabolizer.Results : The age, gender, drug compliance and proportion of CYP2C19 genotypes were similar between the two groups. The H. pylori eradication rates were also similar between the omeprazole group and the esomeprazole group (intention-to-treat analysis: 79% vs. 86%, P 〉 0.05; per-protocol analysis: 85% vs. 94%, P 〉 0.05). For patients classified as homologous extensive metabolizers, the per-protocol H. pylori eradication rate was significantly higher in the esomeprazole group than in the omeprazole group (93% vs. 76%, P 〈 0.05).Conclusion : Esomeprazole 40 mg twice daily for triple therapy may improve the H. pylori eradication compared to omeprazole-based therapy, but only for homologous extensive metabolizers of CYP2C19.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2005.02281.x
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    The efficacy of Helicobacter pylori eradication related to CYP2C19 metabolism: Author's reply (2005)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 22 (2005), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2005.02548.x
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    Paper (German National Licenses)
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