In this paper, we propose a fast and simple approach for the fabrication of the electrocatalytically active ruthenium-containing microstructures using a laser-induced metal deposition technique. The results of scanning electron microscopy and electrical impedance spectroscopy (EIS) demonstrate that the fabricated ruthenium-based microelectrode had a highly developed surface composed of 10 μm pores and 10 nm zigzag cracks. The fabricated material exhibited excellent electrochemical properties toward non-enzymatic dopamine sensing, including high sensitivity (858.5 and 509.1 μA mM cm), a low detection limit (0.13 and 0.15 μM), as well as good selectivity and stability.
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http://dx.doi.org/10.3390/ma13235385 | DOI Listing |
Materials (Basel)
November 2020
Saint Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia.
In this paper, we propose a fast and simple approach for the fabrication of the electrocatalytically active ruthenium-containing microstructures using a laser-induced metal deposition technique. The results of scanning electron microscopy and electrical impedance spectroscopy (EIS) demonstrate that the fabricated ruthenium-based microelectrode had a highly developed surface composed of 10 μm pores and 10 nm zigzag cracks. The fabricated material exhibited excellent electrochemical properties toward non-enzymatic dopamine sensing, including high sensitivity (858.
View Article and Find Full Text PDFBiosens Bioelectron
April 1992
Department of Chemistry, University of Pittsburgh, Pennsylvania 15260.
The concentration of the ruthenium-based label is determined from the rate of hydrogen peroxide production elicited by photolysis. Electron transfer quenching of the photoexcited label by methyl viologen (1,1'-dimethyl-4,4'bipyridinium dication, MV2+) and/or oxygen in the presence of EDTA generates hydrogen peroxide. Both flow injection and direct photolysis techniques were tested, with the latter showing better results.
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