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  • 1
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 40 (1998), S. 530-538 
    ISSN: 0021-9304
    Keywords: titanium ; dissolution ; surface oxide ; repassivation ; simulated bioliquid ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The change in potential during repassivation of titanium in artificial bioliquids was examined, and the regenerated surface oxide film on titanium was characterized using X-ray photoelectron spectroscopy and Auger electron spectroscopy to elucidate the repassivation reaction of titanium in a biological system. The repassivation rate in Hanks' solution was slower than that in saline and was not influenced by the pH of the solution. This indicates that more titanium ions dissolve in a biological system than hitherto was predicted when the surface film is destroyed. Phosphate ions are taken up preferentially in the surface film during regeneration, and the film consists of titanium oxide and titanium oxyhydroxide containing titanium phosphate. Calcium ions and phosphate ions are adsorbed by the film after regeneration, and calcium phosphate or calcium titanium phosphate is formed at the outermost surface. Ions constituting Hanks' solution other than calcium and phosphate were absent from the surface oxide. © 1998 John Wiley & Sons, Inc. J Biomed Mater Res, 40, 530-538, 1998.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 37 (1924), S. 414-418 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 26 (1998), S. 659-666 
    ISSN: 0142-2421
    Keywords: XPS ; nanogranular materials ; Co-Al-N ; magnetic materials ; thin film ; nano-composite ; x-ray diffraction ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Thin (Co0.8Al0.2)100-xNx (x=0-30 at.%) alloy films prepared by a reactive radio frequency (r.f.) sputtering method were characterized by XPS and x-ray diffraction (XRD). The film with no nitrogen consisted of a CsCl-type CoAl metallic compound, while the nitrogen-containing alloys were composed of very fine AlN and face-centred cubic (fcc) Co phases. The quantitative XPS analysis under an assumption of uniform distribution of all the elements resulted in much lower concentrations of Co and higher concentrations of Al and N in comparison with the bulk composition for the nitrogen-containing alloys. By taking account of the granular structure of the alloy films, i.e. the nanoscale particles of fcc Co embedded in the AlN compound, the results of quantitative XPS analysis were explained successfully. Moreover, the thickness of the AlN layer and the size of the fcc Co particles were also able to be estimated under the nanoscale structure models. The results were in good agreement with observation by transmission electron microscopy, especially when a nanostructure model was adopted where nanoscale Co-N particles are dispersed in AlN matrix in a simple cubic-like arrangement. © 1998 John Wiley & Sons, Ltd.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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