Fabrication of label-free and eco-friendly ROS optical sensor with potent antioxidant properties for sensitive hydrogen peroxide detection in human plasma.

Colloids Surf B Biointerfaces

Department of Chemistry, Biochemistry and Physics, Université du Québec à Trois-Rivières (UQTR), Trois-Rivières, Québec, G9A, 5H7, Canada. Electronic address:

Published: August 2021

Herein, biogenic silver nanoparticles, Cafi-AgNPs was produced based on Cassia fistula-phenolic-rich extract (Cafi) only, without any toxic chemical reagent or organic solvent. Cafi bioactives were characterized using UHPLC-ESI-QTOF-MS/MS analysis. The as-synthesized nanoparticles were characterized using physico-chemical techniques including UV-vis, TEM, SEM, EDX, FTIR, DLS, Zeta potential, XRD, TGA and DGA. In addition, their antioxidant properties and cytocompatibility on erythrocytes and HEK-293 cells were examined. Results show that Cafi mediated the successful synthesis of stable well-dispersed AgNPs. Cafi-AgNPs demonstrated potent reducing and radical scavenging activities against ABTS˙, DPPH˙ and NO˙. Furthermore, Cafi-AgNPs was compatible with human erythrocytes and HEK-293 cells. Based on the superior surface plasmonic and biological attributes of Cafi-AgNPs, its potential in HO sensing was evaluated. The proposed sensor demonstrated satisfactory analytical performances with linearity of 10-200 μM, detection limit of 3.0 μM for HO and was successfully applied in the detection of HO in human plasma.

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http://dx.doi.org/10.1016/j.colsurfb.2021.111798DOI Listing

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