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Colloidal systems of silver nanoparticles and high-regioregular cationic polythiophene with ionic-liquid-like pendant groups: Optical properties and SERS
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SYSNO ASEP 0354009 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Colloidal systems of silver nanoparticles and high-regioregular cationic polythiophene with ionic-liquid-like pendant groups: Optical properties and SERS Author(s) Kazim, Samrana (UMCH-V) RID
Pfleger, Jiří (UMCH-V) RID
Procházka, M. (CZ)
Bondarev, D. (CZ)
Vohlídal, J. (CZ)Source Title Journal of Colloid and Interface Science. - : Elsevier - ISSN 0021-9797
Roč. 354, č. 2 (2011), s. 611-619Number of pages 9 s. Language eng - English Country US - United States Keywords ionic conjugated polymer ; polythiophene polyelectrolyte ; plasmonic nanoparticle Subject RIV CD - Macromolecular Chemistry R&D Projects KAN100500652 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA203/07/0717 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000286157000025 DOI 10.1016/j.jcis.2010.11.047 Annotation Structure dependent optical properties of colloidal systems of borate-stabilized silver nanoparticles (Ag NPs) and polythiophene-based cationic polyelectrolyte with ionic-liquid like side groups: poly{3-[6-(1-methylimidazolium-3-yl)hexyl]thiophene-2,5-diyl bromide} (PMHT-Br) towards obtaining local electromagnetic field enhancement effects. Surface-enhanced Raman scattering (SERS) studies showed that the strong electromagnetic field enhancement is related to the formation of aggregates of Ag NPs achieved at the components ratio providing the charge balance between Ag NPs and cationic polythiophene, at which Ag NPs are nearly single-polymer-layer coated, their zeta potential is close to zero and they easily form aggregates in which the mean inter-particle distance enables the occurrence of desired plasmonic effects. Fluorescence quenching is efficient only in the systems with low concentrations of PMHT-Br, in which almost all polymer chains directly interact with the Ag NPs surface. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2011
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