الفهرس 
Chapter one 1Only 14 pages are availabe for public view
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Abstract
Semiconductor nanoparticles of zinc oxide, zinc sulfide, and cadmium sulfide
were prepared and used in coating mixtures to treat the surface of paper
sheets with the aim to prepare fluorescent coatings for security paper.
The structure of the prepared semiconductor nanoparticles was examined
using X‐ray diffraction (XRD) and transmission electron microscopy (TEM).
The properties of paper sheets coated with the prepared nanoparticles were
studied regarding their strength (tensile strength and tear resistance) and their
photo‐luminescent properties. The results showed the possibility to prepare
fluorescent coating using simple method and starting chemicals and with
different UV absorption and fluorescence emission.
Effect of UV and thermal aging on the mechanical and optical properties of the
coated paper sheet was also studied. Coating mixtures containing low
concentrations of semiconductor nanoparticles of cadmium sulfide, zinc
sulfide, and zinc oxide could be used to prepare paper sheets with different
fluorescence properties.
Presence of the semiconductor nanoparticles in the coating mixture improves
tensile strength properties of paper sheets coated with coating mixtures
containing the nanoparticles.