Počet záznamů: 1

Colloidal systems of silver nanoparticles and high-regioregular cationic polythiophene with ionic-liquid-like pendant groups: Optical properties and SERS

  1. 1.
    0354009 - UMCH-V 2011 RIV US eng J - Článek v odborném periodiku
    Kazim, Samrana - Pfleger, Jiří - Procházka, M. - Bondarev, D. - Vohlídal, J.
    Colloidal systems of silver nanoparticles and high-regioregular cationic polythiophene with ionic-liquid-like pendant groups: Optical properties and SERS.
    Journal of Colloid and Interface Science. Roč. 354, č. 2 (2011), s. 611-619 ISSN 0021-9797
    Grant CEP: GA AV ČR KAN100500652; GA ČR GA203/07/0717
    Výzkumný záměr: CEZ:AV0Z40500505
    Klíčová slova: ionic conjugated polymer * polythiophene polyelectrolyte * plasmonic nanoparticle
    Kód oboru RIV: CD - Makromolekulární chemie
    Impakt faktor: 3.070, rok: 2011

    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.
    Trvalý link: http://hdl.handle.net/11104/0193103