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Analyst ; 149(9): 2728-2737, 2024 Apr 29.
Artigo em Inglês | MEDLINE | ID: mdl-38525963

RESUMO

This work presents the synthesis and characterization of an innovative F,S-doped carbon dots/CuONPs hybrid nanostructure obtained by a direct mixture between F,S-doped carbon dots obtained electrochemically and copper nitrate alcoholic solution. The hybrid nanostructures synthesized were characterized by absorption spectroscopy in the Ultraviolet region (UV-vis), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and different electrochemical techniques. The fluoride and sulfur-doped carbon dots/CuONPs nanostructures were used to prepare a non-enzymatic biosensor on a printed carbon electrode, exhibiting excellent electrocatalytic activity for the simultaneous determination of NADH, dopamine, and uric acid in the presence of ascorbic acid with a detection limit of 20, 80, and 400 nmol L-1, respectively. The non-enzymatic biosensors were also used to determine NADH, dopamine, and uric acid in plasma, and they did not suffer significant interference from each other.


Assuntos
Técnicas Biossensoriais , Carbono , Cobre , Dopamina , Técnicas Eletroquímicas , Limite de Detecção , NAD , Ácido Úrico , Ácido Úrico/sangue , Ácido Úrico/química , Técnicas Biossensoriais/métodos , Dopamina/sangue , Dopamina/análise , Carbono/química , NAD/química , NAD/sangue , Cobre/química , Técnicas Eletroquímicas/métodos , Humanos , Enxofre/química , Fluoretos/química , Pontos Quânticos/química , Nanoestruturas/química , Eletrodos
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