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- W4306179908 abstract "• A novel f-GCNFs@nano-CeO 2 core-shell nanocomposite was successfully synthesized. • The f-GCNFs@nano-CeO 2 /GRE showed excellent electrosensing performance for NTyr. • The sensor is highly effective in detecting NTyr in real samples. • The sensor showed low detection limit, considerable sensitivity and stability. • Electrosensing of NTyr in the presence of biomolecules UA and Tyr was explored. Electrode materials with high sensitivity and selectivity play a central role in the fabrication of electrochemical sensing platforms. In this work, functionalized graphitized carbon nanofibers (f-GCNFs) core and nano-sized CeO 2 (nano-CeO 2 ) shell was synthesized. The XRD, SEM, HRTEM and the EDX results confirmed the formation of the f-GCNFs@nano-CeO 2 core-shell nanocomposite. To construct the sensor, the graphite rod electrode (GRE) has been modified with f-GCNFs@nano-CeO 2 . Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results revealed that the charge transfer on the f-GCNFs@nano-CeO 2 /GRE was dramatically enhanced compared to the other electrodes. The prepared platform (f-GCNFs@nano-CeO 2 ) exhibited high electro-catalytic activity and the strong synergistic activity between f-GCNFs and nano-CeO 2 increased the electroactive surface area. The fabricated f-GCNFs@nano-CeO 2 /GRE sensor has been utilized for the detection of the oxidative stress biomarker nitrotyrosine (NTyr) using SW-AdASV. The LOD and the LOQ are found to be 0.86 and 2.9 nM, respectively, with the dynamic range 2.0–1720 nM and sensitivity of 145 μAμM −1 cm −2 . The developed sensor is highly selective for NTyr detection in the presence of uric acid (UA) and tyrosine (Tyr). Moreover, the fabricated sensor also shows good selectivity, favorable reproducibility, and long-term stability. The applicability of the fabricated sensor demonstrated excellent recovery of NTyr in spiked human serum, urine, and saliva samples. In the end, f-GCNFs@nano-CeO 2 /GRE was applied to the determination of UA, NTyr, and Tyr simultaneously." @default.
- W4306179908 created "2022-10-14" @default.
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- W4306179908 date "2022-12-01" @default.
- W4306179908 modified "2023-10-18" @default.
- W4306179908 title "A new ultrasensitive platform based on f-GCNFs@nano-CeO2 core-shell nanocomposite for electrochemical sensing of oxidative stress biomarker 3-nitrotyrosine in presence of uric acid and tyrosine" @default.
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- W4306179908 doi "https://doi.org/10.1016/j.microc.2022.108068" @default.
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