Počet záznamů: 1
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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Colloidal systems of silver nanoparticles and high-regioregular cationic polythiophene with ionic-liquid-like pendant groups: Optical properties and SERS Tvůrce(i) Kazim, Samrana (UMCH-V) RID
Pfleger, Jiří (UMCH-V) RID
Procházka, M. (CZ)
Bondarev, D. (CZ)
Vohlídal, J. (CZ)Zdroj.dok. Journal of Colloid and Interface Science. - : Elsevier - ISSN 0021-9797
Roč. 354, č. 2 (2011), s. 611-619Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova ionic conjugated polymer ; polythiophene polyelectrolyte ; plasmonic nanoparticle Vědní obor RIV CD - Makromolekulární chemie CEP KAN100500652 GA AV ČR - Akademie věd GA203/07/0717 GA ČR - Grantová agentura ČR CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000286157000025 DOI 10.1016/j.jcis.2010.11.047 Anotace 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. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2011
Počet záznamů: 1