Abstract
This paper reports on the results of investigations into the phase composition of HgI2 microcrystals formed in the bulk and on the surface of different nanocrystalline matrices: pressed, finely dispersed (with a specific surface of more than 210 m2/g) aluminum oxide powders; porous borosilicate glasses with pore radii ranging from 2 to 20 nm; and Al2O3-HgI2 and SiO2-HgI2 nanocrystalline composites. The results of spectroscopic analysis (diffuse reflection, absorption, and luminescence spectroscopy) are complemented by the data of atomic-force microscopy (AFM) and x-ray diffraction. The experimental results indicate that nonequilibrium modifications, namely, the high-temperature yellow phase and the orange phase metastable in bulk crystals at all temperatures, can be stabilized in HgI2 nanoparticles at room temperature.
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Translated from Fizika Tverdogo Tela, Vol. 44, No. 7, 2002, pp. 1326–1331.
Original Russian Text Copyright © 2002 by Akopyan, Labzovskaya, Novikov, Golubok, Rozanov, Denisov, Pavlova, Fedorov.
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Akopyan, I.K., Labzovskaya, M.É., Novikov, B.V. et al. Formation of the HgI2 crystalline phase in the bulk and on the surface of nanocrystalline matrices. Phys. Solid State 44, 1388–1393 (2002). https://doi.org/10.1134/1.1494640
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DOI: https://doi.org/10.1134/1.1494640