Počet záznamů: 1
Light Scattering, Atomic Force Microscopy and Fluorescence Correlation Spectroscopy Studies of Polystyrene-block-poly(2-vinylpyridine)-block-poly(ethylene oxide) Micelles
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SYSNO ASEP 0181759 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Light Scattering, Atomic Force Microscopy and Fluorescence Correlation Spectroscopy Studies of Polystyrene-block-poly(2-vinylpyridine)-block-poly(ethylene oxide) Micelles Tvůrce(i) Štěpánek, M. (CZ)
Humpolíčková, J. (CZ)
Procházka, K. (CZ)
Hof, Martin (UFCH-W) RID, ORCID
Tuzar, Zdeněk (UMCH-V) RID
Špírková, Milena (UMCH-V) RID, ORCID
Wolff, T. (DE)Zdroj.dok. Collection of Czechoslovak Chemical Communications. - : Ústav organické chemie a biochemie AV ČR, v. v. i. - ISSN 0010-0765
Roč. 68, č. 10 (2003), s. 2120-2138Poč.str. 19 s. Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova block copolymer micelles ; water-soluble polymers ; polystyrene Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP LN00A032 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA203/01/0536 GA ČR - Grantová agentura ČR GA203/01/0735 GA ČR - Grantová agentura ČR CEZ AV0Z4050913 - UMCH-V AV0Z4040901 - UFCH-W Anotace Polymeric nanoparticles formed by triblock copolymer polystyrene-block-poly(2-vinylpyridine)-block-poly(ethylene oxide), PS-PVP-PEO, in aqueous media were studied by a combination of fluorescence correlation spectroscopy with other fluorescence techniques, by light scattering and atomic force microscopy. The studied polymeric nanoparticles exist in the form of (i) core/shell micelles in acid solution at pH lower than 4.8 and (ii) three layer onion micelles at higher pH. Since water is very strong precipitant for PS, both types of micelles have kinetically frozen spherical PS cores. The cores of micelles in acid media are surrounded by soluble shells formed by partially protonated PVPH+ and PEO, while the cores of micelles in alkaline media are surrounded by compact insoluble layers from deprotonated PVP and soluble PEO shells. The micellization behavior of PS-PVP-PEO micelles is accompanied by secondary aggregation of micelles, which is provoked by stirring. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2004
Počet záznamů: 1