Nano Archive

Self-assembly of hybrid “Organic dye J-aggregate/semiconductor” nanostructures in AOT/waterhexane reverse micelles

Nikolenko, L. and Brichkin, S. and Nikolaeva, T. and Razumov, V. (2009) Self-assembly of hybrid “Organic dye J-aggregate/semiconductor” nanostructures in AOT/waterhexane reverse micelles. Nanotechnologies in Russia, 4 . pp. 19-26.

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Official URL: http://dx.doi.org/10.1134/S1995078009010029

Abstract

The self-assembly of nanocrystal-J-aggregate hybrid nanostructures (HNSs) was performed by mixing two AOT-water-hexane solutions of reverse micelles, one of which contained J-aggregates of the 3,3′-di(γ-sulfopropyl)-4,5,4′,5′-dibenzo-9-ethylcarbocyanine betaine pyridinium salt dye and the other contained AgI nanocrystals. Two new absorption bands of the dye were found at λmax = 673 nm and λmax = 695 nm during the formation of HNSs; the bands corresponded to J-aggregates of different structures adsorbed on nanocrystals. The excess iodide ions necessary for the synthesis of AgI nanocrystals was found to be the chief factor governing the self-assembly of HNSs, which suggests that the crystal lattice plays an important role for the self-assembly of HNSs. The components of the HNS affect each other symbiotically in that nanocrystals increase the photostability of J-aggregates and the adsorbed J-aggregate effectively stabilizes the size of nanocrystals. The resulting stable HNSs could be extracted from the micellar solution without further aggregation.

Item Type:Article
Additional Information:10.1134/S1995078009010029
ID Code:7673
Deposited By:Prof. Alexey Ivanov
Deposited On:11 Nov 2009 07:55
Last Modified:11 Nov 2009 08:00

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