Correlation of nanodomain morphology and ultrafast fluorescence dynamics in bisdecylsexithiophene-polyethylene oxide copolymer film
| Autor: | Jan Sepelak, Daniel Repovsky, Ignac Bugar, Dusan Velic, Gabriel Čík, Tibor Palszegi, Eduard Jane, Vojtech Szőcs |
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| Rok vydání: | 2017 |
| Předmět: |
Morphology (linguistics)
Chemistry General Chemical Engineering Relaxation (NMR) General Physics and Astronomy Nanotechnology 02 engineering and technology General Chemistry Surface finish 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence Fluorescence spectroscopy Rod 0104 chemical sciences Chemical engineering Copolymer Lamellar structure 0210 nano-technology |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 343:103-111 |
| ISSN: | 1010-6030 |
| DOI: | 10.1016/j.jphotochem.2017.04.023 |
| Popis: | Bisdecylsexithiophene rods and polyethylene oxide coils forming alternating copolymer are of photo-physical interest. Nanodomain morphology by means of atomic force microscopy and steady-state/time-resolved fluorescence spectroscopy are correlated. Films, by using drop-casted and spin-coated preparation, consist of drops and terraces with average roughness R a , maximal height R max , and nanodomain size to be 94.2 and 24.4 nm, 489.1 and 171.7 nm, and 200 × 400 nm and 1000 × 1000 nm, forming cylindrical and lamellar aggregates, respectively. The nanodomain aggregate thickness is 8 nm. The ultrafast dynamics of drop-casted and spin-coated films result in two relaxations of 6.9 ps and 12.0 ps, and only one relaxation of 5.3 ps, respectively. The simulation focuses on cylindrical (12 × 4 and (10 ± 2)x(4 ± 1)) and lamellar (12 × 12 and (10 ± 2)x(10 ± 2)) nanodomains. The aggregate nanodomains and intra-aggregate dynamics correlate as two-parameter drop-casted film and one-parameter spin-coated film. |
| Databáze: | OpenAIRE |
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