Enhancing electroanalytical performance of porous boron-doped diamond electrodes by increasing thickness for dopamine detection

0549371 - FZÚ 2022 RIV NL eng J - Journal Article
Baluchová, Simona - Brycht, M. - Taylor, Andrew - Mortet, Vincent - Krůšek, Jan - Dittert, Ivan - Sedláková, Silvia - Klimša, Ladislav - Kopeček, Jaromír - Schwarzová-Pecková, K.
Enhancing electroanalytical performance of porous boron-doped diamond electrodes by increasing thickness for dopamine detection.
Analytica Chimica Acta. Roč. 1182, Oct (2021), č. článku 338949. ISSN 0003-2670. E-ISSN 1873-4324
R&D Projects: GA ČR(CZ) GA20-03187S
Research Infrastructure: CzechNanoLab - 90110
Institutional support: RVO:68378271 ; RVO:67985823
Keywords : boron-doped diamond * dopamine * Poly-L-lysine coating * porous layers * voltammetry
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis); Neurosciences (including psychophysiology (FGU-C)
Impact factor: 6.911, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.aca.2021.338949

This study reports on morphological, spectral, and electrochemical characterisation of 3 BDDporous electrodes of different thickness given by a number of deposited layers (2, 3 and 5), prepared using MWPECVD on SiO2 nanofiber-based scaffolds. The effect of thickness and poly-l-lysine coating on sensing properties of dopamine in a pH 7.4 phosphate buffer media was investigated. A boron doping level of ∼2 × 1021 atoms cm−3 and increased content of sp2 carbon in electrodes with more layers was evaluated by Raman spectroscopy. CV revealed reduced working potential windows (from 2.4 to 2.2 V), higher double-layer capacitance values (from 405 to 1060 μF cm−2), enhanced rates of electron transfer kinetics and larger effective surface areas (from 5.04 to 7.72 mm2), when the number of porous layers increases.
Permanent Link: http://hdl.handle.net/11104/0325404