Abstract
The structures of J-aggregates of two monomethine dyes are compared at the meso- and nanoscale by using fluorescence and atomic force microscopy. The J-aggregates of the two dyes are found to have solely a monolayer structure and to be polymorphic. Morphologically, monolayers represent narrow skew-symmetric strips and symmetric rhombi in the case of the first and the second dyes. The second morphological type is the tubular type in both cases. For monolayers of both dyes, atomic force microscopy imaging at the ultimate resolution reveals the presence of a quasi-one-dimensional substructure consisting of densely packed nanostrips with a width in the range of 7–10 nm. The nanostrips are interpreted as building blocks emerging at early stages of monolayer crystallization that proceeds via a nonclassical multistep mechanism.
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This work was supported by the Russian Foundation for Basic Research (grant no. 17-03-01179 A).
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Translated by A. Kukharuk
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Prokhorov, V.V., Pozin, S.I., Perelygina, O.M. et al. Polymorphic Structures of Monolayer J-Aggregates of Two Monomethine Cyanine Dyes at the Meso- and Nanoscale. Inorg. Mater. Appl. Res. 12, 959–963 (2021). https://doi.org/10.1134/S207511332104033X
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DOI: https://doi.org/10.1134/S207511332104033X