Micro-spectroscopy of individual nanostructures of molecular aggregates: relationship between morphology and optical properties

Results on microscopic reflection imaging and spectroscopy of J-aggregates of pseudoisocyanine dyes in thin film matrices of polyvinyl sulfate, polyvinyl alcohol and polystyrene are reported. Despite different aggregation mechanisms in the three polymers, reflection images show formation of similar,...

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Bibliographic Details
Published in:Chemical physics 2002-12, Vol.285 (1), p.149-155
Main Authors: Vacha, Martin, Saeki, Masaaki, Hashizume, Ken-ichi, Tani, Toshiro
Format: Article
Language:English
Subjects:
Exciton–polariton
J-aggregate
Microscopy
Polarization
Pseudoisocyanine
Reflection spectroscopy
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Summary:Results on microscopic reflection imaging and spectroscopy of J-aggregates of pseudoisocyanine dyes in thin film matrices of polyvinyl sulfate, polyvinyl alcohol and polystyrene are reported. Despite different aggregation mechanisms in the three polymers, reflection images show formation of similar, highly reflecting fiber-like nanostructures in all samples. Local reflectance spectra reveal large inhomogeneities of local optical properties that are determined by an onset of exciton–polariton character.
ISSN:0301-0104
DOI:10.1016/S0301-0104(02)00697-3