28 October 2005 New nanoheterostructures on a base of Astralenes, spectral and polarization peculiarities, photochemical aspects of application
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Abstract
A non-covalent solubilization technique allowed us to synthesize original compositions such as suspensions of astralenes in nematic liquid crystal (LC). Study of their spectral luminescent parameters in a planar oriented cell led to discovery of bands in the absorption spectra at 1300 and 1700 nm. In our assumption, they correspond to transitions between van Hove singularities (VHS) in electronic state densities. It gave us the opportunity to pioneer measurement of absorption dichroism in the suspensions of carbon nanoparticles and found existence of different polarizations at transitions, responsible for background absorption and absorption in the van Hove bands. The role of the photochemical factor in photodynamics of optical limiting on carbon nanoheterostructures is discussed.
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M. A. Belyaeva, M. V. Gryaznova, V. V. Danilov, A. N. Ponomarev, V. V. Ryl'kov, "New nanoheterostructures on a base of Astralenes, spectral and polarization peculiarities, photochemical aspects of application", Proc. SPIE 5990, Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II, 59900H (28 October 2005); doi: 10.1117/12.629875; https://doi.org/10.1117/12.629875
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