Cu(I) Coordination Complex Precursor for Randomized CuOx Microarray Loaded on Carbon Nanofiber with Excellent Electrocatalytic Performance for Electrochemical Glucose Detection.
Sensors (Basel)
; 19(24)2019 Dec 04.
Article
em En
| MEDLINE
| ID: mdl-31817245
ABSTRACT
A homoleptic ionic Cu(I) coordination complex that was based on 2,2'-biquinoline ligand functionalized with long alkyl chains (Cu(I)-C18) was used as a precursor to modify a carbon nanofiber paste electrode (Cu-C18/CNF). Randomized copper oxide microelectrode arrays dispersed within carbon nanofiber paste (CuOx/CNF) were obtained by electrochemical treatment of Cu-C18/CNF while using cyclic voltammetry (CV). The CuOx/CNF exhibited high electrocatalytic activity towards glucose oxidation at +0.6 V and +1.2 V vs. Ag/AgCl. Infrared Spectroscopy (FTIR) and scanning electron microscopy (SEM) characterized the electrodes composition. Cyclic voltammetry (CV), square wave-voltammetry (SWV), and multiple-pulsed amperometry (MPA) techniques provided optimized conditions for glucose oxidation and detection. A preconcentration step that involved 10 minutes accumulation at open circuit potential before SWV running led to the lowest limit of detection and the highest sensitivity for glucose detection (5419.77 µA·mM-1·cm-2 at + 1.1 V vs. Ag/AgCl) vs. Cu-based electrodes reported to date in literature.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Cobre
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Técnicas Eletroquímicas
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Complexos de Coordenação
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Nanofibras
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Glucose
Tipo de estudo:
Clinical_trials
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Diagnostic_studies
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article