feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

  • Electronic Resource  (2)
  • 1975-1979  (1)
  • 1970-1974  (1)
  • Electronic Resource  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Applied physics 16 (1978), S. 381-390 
    ISSN: 1432-0630
    Keywords: 73 ; 72.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Indium-tin-oxide films (ITO films) sputtered in Ar-atmosphere with and without addition of oxygen reveal an irreversible increase in conductivity during annealing in vacuum. This annealing process increases drastically the density of free electrons, while the Hall mobility changes only slightly. Below the annealing temperature the temperature dependence of the conductivity is reversible. In films with low density of free electrons, which behave like non-degenerated semiconductors, two activation energies for the mobility could be found. The irreversible changes, observed during annealing in the vacuum, are explained by diffusion of oxygen from the interior of the film to the surface, followed by desorption of the oxygen from the surface into the vacuum. The excess oxygen in the non-stoichiometric films plays the role of electron traps. The irreversible effects during annealing in the vacuum are partly reversible in the long run. If the annealed films are exposed to oxygen or air their conductivity decreases because of diffusion of oxygen from the surface into the film.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 3725-3731 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Orthoamides, XXIV. Synthesis and Reactions of Amide Thioacetals and Aminal ThioestersThe amide thioacetals 2 are obtained by reaction of the N,N-dimethylformamide dimethyl sulfate adduct 1 with sodium thiolates or by treatment of N,N-dimethylformamide diethyl acetal (3) with alkanthiols. Aminal thioesters 11 are formed by reaction of tetramethylformamidinium methyl sulfate (10) with alkali alkanethiolates or by treatment of aminal-tert-butylester 12 with alkanethiols. The compounds have properties similar to those of their oxygen homologues.
    Notes: Amidthioacetale 2 erhält man aus dem N,N-Dimethylformamid-Dimethylsulfat-Addukt 1 und Natriumthiolaten oder aus N,N-Dimethylformamid-diäthylacetal (3) und Alkanthiolen, Aminalthioester 11 aus Tetramethylformamidinium-methylsulfat (10) und Alkali-alkanthiolaten oder aus dem Aminal-tert-butylester 12 und Alkanthiolen. Die Verbindungen zeigen ähnliche Eigenschaften wie ihre Sauerstoff-Homologen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...