Silver nanoprisms with strong absorption in the near‐IR have been synthesized using a modification of the photoinduced method by illuminating preformed silver seeds under different illumination conditions. Low‐intensity light‐emitting diodes and white light combined with different color filters are used as light sources. The lateral dimensions of the nanoprisms are found to be correlated in a quasilinear fashion with the emission wavelength and the position of the main in‐plane dipole plasmon band. The structural characterization of the Ag nanoparticles, carried out using scanning electron microscopy, transmission electron microscopy (TEM), high‐resolution TEM, and electron diffraction, reveal that the particles are flat and have a single‐crystal face‐centered‐cubic structure. Time‐resolved studies suggest that the nanoprisms are formed by steady consumption of the original Ag seeds with little variation of the aspect ratio after a short induction time.

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Was synthesized two copper ( II ) complexes and one nickel complex of N-benzylidene-aniline derivatives and their ligands. We have performed polarized FTJIR spectroscopy and X-ray diffraction measurements in wide temperature range ( 0-220°C ) in order to establish correlation's among molecular, crystal and mesophase structures. We provided comparison of the FTIR and X -ray diffractometry results between well known metallo -organic copper ( II ) complexes, which crystallizes in the monoclinic space group C2/c, with similar nickel complex. Investigated ligands and their metallo -mesogens are displaying the same sequence of the liquid crystalline phases -only with higher melting temperature for metallo -complexes

Recently photonic crystals with a three -dimensional ordered structure with periodicity of the optical wavelength have attracted attention from both fundamental and practical points of view. The physics and applications of photonic crystals have been active topic of research now. The application of photonic crystals is to create tunable band gap materials especially in visible spectra region, where the gap could be controlled by an external parameter. We have studied transmission and linear dichroism spectra of synthetic opal, refractive index n=l,342, infiltrated with nematic liquid crystal with averaged refractive index n= 1,596 or with water n=l,30 and alcohol n=l,28. We demonstrating that the position of the stop band in the visible spectra is shifted by changing of refractive index of the infiltrated material or by changing the filling factor or by variation ofa incidence angle of light.

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