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  • 1
    Electronic Resource
    Electronic Resource
    Photoemission study of potassium on Si-based semiconductors: a-Si:H, a-Si, and c-Si(001) (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 6594-6600 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A synchrotron-radiation photoemission study of K evaporated on rf-sputtered a-Si:H, a-Si, and c-Si(001) semiconductor surfaces at room temperature is reported. The a-Si substrate was obtained from sputtering of the c-Si(001) surface. It is found that the change in work function upon K adsorption is smallest on the most disordered surface, a-Si:H. A strong covalent K–Si interface state at about 5.9 eV binding energy appears only in disordered surfaces. Surface structure plays a major role in its occurrence. Further, the amorphous surfaces stay semiconducting despite large doses of K atoms, while the K/c-Si(001) surface becomes metallic at the instance of a work-function minimum. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359069
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  • 2
    Electronic Resource
    Electronic Resource
    Development of the Gd(0001) band structure with film thickness : The 5th Joint MMM−Intermag Conference (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 6565-6567 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By growing gadolinium films on W(110), it has been possible to observe the development of the Gd(0001) band structure with increasing film thickness. The changes in the 5d bands as a result of exposure to oxygen or the development of the valence-band structure with increasing film thickness lead to changes in the 5p multiplet oscillator strengths. These changes are a result of the influence of the band structure upon the final-state effects that give rise to such multiplet structures. This study provides conclusive evidence that there is a 5d contribution to the shallow 5p multiplet photoemission core-level structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349858
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of a water-insoluble organic acid on amine extraction of acetic acid from aqueous solutions. Equilibrium studies (1996)
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 66 (1996), S. 160-168 
    Details
    ISSN: 0268-2575
    Keywords: extraction ; equilibrium ; acetic acid ; tri-n-octylamine ; di(2-ethylhexyl) phosphoric acid ; synergistic and antagonistic effects ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effect of a water-insoluble organic acid, di(2-ethylhexyl)phosphoric acid (D2EHPA), on the extraction equilibrium of acetic acid from aqueous media with xylene solutions of tri-n-octylamine (TOA) was systematically investigated. In the absence of D2EHPA, the formulation of the extracted species in the organic phase and equilibrium constants for the formation of these species were numerically determined. Synergistic and antagonistic effects on the extraction of acetic acid were observed in the presence of D2EHPA, mainly depending on the concentration of TOA and the concentration ratio of D2EHPA to TOA. Finally, the influence of temperature on the extraction of acetic acid with TOA and/or D2EHPA was investigated.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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