We performed an experimental investigation on the scattering and extinction properties of an aqueous solution of spermine-induced fractal J aggregates, constituted by porphyrin molecules. In analogy with nanostructured particle composites, the dipolar moments of different porphyrins, not belonging to the J aggregates, are coupled and generate a strong light scattering enhancement. Both the enhanced scattered intensity and the imaginary part of the polarizability of the system obey scaling laws with the optical spectral dimension d(0)=0.3.

Light scattering enhancement in an aqueous solution of spermine-induced fractal J-aggregate composite

MONSU' SCOLARO, Luigi;ROMEO, Andrea;CASTRICIANO, MARIA
2005

Abstract

We performed an experimental investigation on the scattering and extinction properties of an aqueous solution of spermine-induced fractal J aggregates, constituted by porphyrin molecules. In analogy with nanostructured particle composites, the dipolar moments of different porphyrins, not belonging to the J aggregates, are coupled and generate a strong light scattering enhancement. Both the enhanced scattered intensity and the imaginary part of the polarizability of the system obey scaling laws with the optical spectral dimension d(0)=0.3.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11570/1432672
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