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Role of dextran in stabilization of polypyrrole nanoparticles for photoacoustic imaging
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SYSNO ASEP 0544172 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Role of dextran in stabilization of polypyrrole nanoparticles for photoacoustic imaging Author(s) Paúrová, Monika (UMCH-V) RID, ORCID
Taboubi, Oumayma (UMCH-V) RID, ORCID
Šeděnková, Ivana (UMCH-V) RID
Hromádková, Jiřina (UMCH-V) RID
Matouš, P. (CZ)
Herynek, V. (CZ)
Šefc, L. (CZ)
Babič, Michal (UMCH-V) RID, ORCIDArticle number 110634 Source Title European Polymer Journal. - : Elsevier - ISSN 0014-3057
Roč. 157, 15 August (2021)Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords Polypyrrole nanoparticles Dextran Heterogeneous polymerization Subject RIV FS - Medical Facilities ; Equipment OECD category Medical laboratory technology (including laboratory samples analysis R&D Projects GA18-05200S GA ČR - Czech Science Foundation (CSF) Research Infrastructure Czech-BioImaging II - 90129 - Ústav molekulární genetiky AV ČR, v. v. i. Method of publishing Limited access Institutional support UMCH-V - RVO:61389013 UT WOS 000693338800007 EID SCOPUS 85110410249 DOI 10.1016/j.eurpolymj.2021.110634 Annotation Polypyrrole with bioinert surface is a prospective contrast agent for photoacoustic imaging. Dextran (Dex) was successfully tested as a steric stabilizer of the dispersion polymerization producing stable polypyrrole nanoparticles (PPy-NPs). Polymerizations were mediated with three different oxidizers: iron (III) chloride, ammonium persulfate and cerium ammonium nitrate. The use of the Dex allowed good control of particle size within the range 60–200 nm through varying concentration of the Dex and polymerization temperature, with the exception of cerium mediated polymerizations, which produced 30 nm particles independently of the reaction conditions. Stabilization effect of the Dex resulted from a reversible adsorption of the Dex on the surface of nanoparticles. Spectral analysis confirmed the complete removal of the Dex from particle surfaces during washing procedure, which indicated no grafting of the Dex to PPy-NPs mediated with a radical process initiated with decay of persulfate or single electron oxidation of the Dex by cerium ammonium nitrate. Photoacoustic measurement proved detectable signals in near infrared regions. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S0014305721003682?via%3Dihub
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