Molecular organization of perylene derivatives in Langmuir-Blodgett multilayers
PBN-AR
Instytucja
Wydział Nowych Technologii i Chemii (Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego)
Źródłowe zdarzenia ewaluacyjne
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
Optical Materials
ISSN
0925-3467
EISSN
Wydawca
ELSEVIER SCIENCE BV
DOI
URL
Rok publikacji
2015
Numer zeszytu
Strony od-do
555-560
Numer tomu
46
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
Aggregates
Atomic force microscopy
Fatty acids
Fluorescence
Gold deposits
Multilayer films
Multilayers
Polycyclic aromatic hydrocarbons
Substrates
Topography
X ray diffraction
Absorption and fluorescence spectra
Dye aggregates
Fluorescence lifetimes
Langmuir-Blodgett multilayers
Molecular organization
Perylene dyes
Spectroscopic property
X ray diffraction profile
Langmuir Blodgett films
Streszczenia
Język
en
Treść
In this work we discuss molecular organization and spectroscopic properties of Langmuir-Blodgett multilayers of two fluorescent perylenetetracarboxylic acid derivatives and their mixtures with fatty acid. A single component and mixed films were formed on pure water surface and deposited onto solid substrate by multiple vertical substrate immersion. After the deposition spectroscopic properties of the multilayers were studied. The X-ray diffraction profiles show periodical structures with the period of 1.5 nm of the multilayer pure dye films deposited onto gold covered glass substrates. The optical spectroscopy analysis shows that perylene dye molecules are present in monomer and aggregated forms in both types of the films, which is revealed by the absorption and fluorescence spectra as well as two-exponential decay of fluorescence. The morphology of the films in the nanoscopic scale was examined using atomic force microscopy. The LB film topography made of the dye with shorter alkyl chain substituent revealed emergence of belt-like aggregates, whereas in the case of the dye with longer alkyl chain substituent columnar structure was observed. Our results show that the dye aggregation in the LB multilayer systems is not the same as in single LB layers. © 2015 Elsevier B.V. All rights reserved.
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
620471
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