Electrochemical and radical properties of core-shell structure PDA@SiO2

0578203 - ÚMCH 2025 RIV NL eng J - Článek v odborném periodiku
Tadyszak, Krzysztof - Tomšík, Elena - Černochová, Zulfiya
Electrochemical and radical properties of core-shell structure PDA@SiO2.
Synthetic Metals. Roč. 301, January-February (2024), č. článku 117492. ISSN 0379-6779. E-ISSN 0379-6779
Grant CEP: GA MŠMT(CZ) LM2023053; GA ČR(CZ) GA21-01090S
Institucionální podpora: RVO:61389013
Klíčová slova: polydopamine * silicon dioxide * core-shell structure
Obor OECD: Polymer science
Impakt faktor: 4.4, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S037967792300214X?via%3Dihub

Radical and electrochemical properties of core-shell polydopamine structures (PDA@SiO2) were studied. We have successfully covered large silica nanoparticles (ca. 960 nm) with a thin layer of polydopamine. The radical’s concentration present in PDA is 1.32 × 10 to 15spin/mg and after synthesis in PDA@SiO2 system it is 8.4×10 to 13spin/mg. The core-shell structure maintained its radical scavenging properties due to a thin layer of PDA covering silica. Cyclic voltammetry (CV) shows a reduction of peak-to-peak potential separation and an increase of anodic and cathodic current with an increase in the scan rate. Electrochemical impedance spectroscopy shows the electrical connection between PDA and SiO2. PDA@SiO2 core-shell system is electrochemically nondegradable showing a quasi-reversible electrochemical response, which makes it a promising candidate for sensor applications.
Trvalý link: https://hdl.handle.net/11104/0350063