Národní úložiště šedé literatury Nalezeno 59 záznamů.  začátekpředchozí57 - 59  přejít na záznam: Hledání trvalo 0.00 vteřin. 
Surface roughness and resistivity of thin films
Franc, J. ; Novotný, Jan
Surface finish of alumina thin film substrates was measured with stylus profilometer. A connection between the obtained values of Ra and the thin film resistance was studied. No correlation can be found owing to big stylus radius and computation method used in profilometer.
Sensitivity of CdS photoresistors in ultraviolet spectrum and technology
Franc, J. ; Novotný, Jan ; Jirásek, L. ; Petráň, S. ; Kliment, P.
Several groups of photoresistors based on thin film of evaporated CdS were prepared. Groups were distinguished in concentrations of acceptors (Cu) and donors (Cl) which were used in activation of layers. Each group was characterised by means of slope in visible range and by relative sensitivity in UVA region. Relative sensitivity in UVA region decreases when concentrations of activators increasee.
Technolgy of materials preparation for the high sensitivity infrared detectors
Novotný, Jan ; Zelinka, Jiří ; Franc, J.
Single crystals of triglycine sulphate (TGS) doped with L-alanin, lysin and with Co.sup.2+.sup., Cd.sup.2+.sup. and PO.sub.4./sub..sup.3-.sup. were grown from aqueous solutions by means of slow cooling method. Concentration of doping elements varied from 5 to 20mol. per cent. Morphology, domain structure and P-E hysteresis loops have been investigated. TGS single crystals doped with Co.sup.2+.sup. and PO.sub.4./sub..sup.3-.sup. show the inernal fields as high as 217 kV/m with peculiarities in the hysteresis loops. The best hysteresis loop has been obtained on TGS crystal doped with Lysin and Cd.sup.2+.sup. ions.

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