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1996 (1)
1989 (1)
1Author    KostasS. Farmakis, IoannisG. PouliosRequires cookie*
 Abstract    h a r a c te r iz a tio n o f E le c tro d e p o s ite d M o ly b d e n u m B la c k S u r f a c e C o a tin g s Molybdenum black has been produced in thin coating form (3 pm) on prepared aluminium surfaces by the method of electrodeposition. The microstructure of the coating has been identified as one of flat irregular platelets belonging to a material which can be described as quasi-amorphous. Its chemical composition is 90 wt% MoO, • 2 H20 and 10 wt% Ni(OH)2 • Mo-black appears to be a good absorber of solar radiation. Absorbance values as high as 93% have been measured for the visible region of the solar energy spectrum. It has been identified that the coating is of semiconduct­ ing nature and that the dominant conduction mechanism is the Schottky emission mechanism. Photoelectrochemical measurements have finally provided evidence for photon-induced electro­ chemical processes at the Mo-black electrodes. 
  Reference    Z. Naturforsch. 44a, 533—537 (1989); received September 22 1988 
  Published    1989 
  Keywords    Molybdenum black, Electrodeposition, Amorphous semiconductor, Schottky emission 
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 TEI-XML for    default:Reihe_A/44/ZNA-1989-44a-0533.pdf 
 Identifier    ZNA-1989-44a-0533 
 Volume    44 
2Author    P.Craig TaylorRequires cookie*
 Title    Nuclear Quadrupole Resonance in Amorphous Semiconductors  
 Abstract    Nuclear quadrupole resonance (NQR) has provided a valuable tool for investigating the local structural order in semiconducting glasses. Measurements of NQR lineshapes and spin-lattice relaxation times help elucidate the local structural order and the unusual vibrational properties, respectively, of these glasses. In addition, NQR lineshape measurements on samples that are made under conditions that produce solids whose structures are far from equilibrium, such as fast-evap-orated films or rapidly-drawn fibers, provide detailed information on the changes in the local structural order from that which occurs in the well-annealed amorphous semiconductors. 
  Reference    Z. Naturforsch. 51a, 603—610 (1996); received November 20 1995 
  Published    1996 
  Keywords    NQR, chalcogenide glasses, amorphous semiconductors, structure, vibrational properties 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-0603.pdf 
 Identifier    ZNA-1996-51a-0603 
 Volume    51