30 April 2012 Equilibrium component composition and structure of nanometer cyanine dye layers and their photoinduced modification
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Abstract
We study the component composition of cyanine dye layers on different substrates (glass, mica, and sapphire) by the absorption spectroscopy. We found that the molecular layer contains isomers of the molecules being coated and aggregated components (dimers and J-aggregates). The relative concentrations of the components depend on the structure of dye and its surface concentration. The single laser pulses of several nanosecond length lead to irreversible changes in the structure of molecular nanolayers and result in the change of the relative concentrations of the layer components. Two types of the spatial orientation of the nanocomponents with different orientations with respect to the surface are formed. One of these types of the orientation transforms into another type under the action of pulsed laser radiation. The above changes were found for all the dielectric substrates studied.
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Anton A. Starovoytov, Anton A. Starovoytov, Elena N. Kaliteevskaya, Elena N. Kaliteevskaya, Valentina P. Krutyakova, Valentina P. Krutyakova, Tatiana K. Razumova, Tatiana K. Razumova, Nikita A. Toropov, Nikita A. Toropov, } "Equilibrium component composition and structure of nanometer cyanine dye layers and their photoinduced modification", Proc. SPIE 8435, Organic Photonics V, 84352G (30 April 2012); doi: 10.1117/12.926866; https://doi.org/10.1117/12.926866
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