Počet záznamů: 1
Colloidal systems of silver nanoparticles and high-regioregular cationic polythiophene with ionic-liquid-like pendant groups: Optical properties and SERS
- 1.0354009 - ÚMCH 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. E-ISSN 1095-7103
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
Počet záznamů: 1