30 November 2015 Anion-dye-induced spectral sensitization of holographic microsystems core-silver halide shell
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Proceedings Volume 9809, Twelfth International Conference on Correlation Optics; 98090E (2015) https://doi.org/10.1117/12.2224931
Event: 12th International Conference on Correlation Optics, 2015, Chernivsti, Ukraine
Abstract
We have studied spectral sensitization with anionic dyes of holographic microsystems “core – silver halide shell” (CSHS), cores of which can be either nonsilver or silver halide compounds. Conditions under which dye sensitizers, being adsorbed on cores, remain under silver halide shells after their growing are considered. Comparison of results of sensitometric and low-temperature (Т = 77 K) luminescent measurements have shown that these conditions are determined by the charge state of cations of microsystem cores. If the shell contains the same univalent component in its composition as the core does, as in the case in which the core is a silver halide compound, the anionic dye is displaced to the outer surface of the shell. If the core contains a divalent cationic component, as in the case in which the core is a nonsilver compound, the dye remains under the silver halide shell; i.e., it is overgrown by the shell. We have shown that the charge state of core cations affects the character of the core interaction with anionic dyes, which ensures differences in the spectral sensitization of CSHS microsystems, as well as differences in the dye photoexcitation relaxation in them. We have found that supersensitization of AgBr microcrystals sensitized by infrachromatic dye affects the interaction between the dye aggregates and the surface silver ions, which induces modification of the holographic microsystems’ spectral sensitivity range.
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A. V. Tyurin, A. V. Tyurin, S. A. Zhukov, S. A. Zhukov, V. P. Churashov, V. P. Churashov, A. Y. Bekshaev, A. Y. Bekshaev, "Anion-dye-induced spectral sensitization of holographic microsystems core-silver halide shell", Proc. SPIE 9809, Twelfth International Conference on Correlation Optics, 98090E (30 November 2015); doi: 10.1117/12.2224931; https://doi.org/10.1117/12.2224931
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