Colorimetric sensing of glucose and GSH using core–shell Cu/Au nanoparticles with peroxidase mimicking activity

Abstract

Core–shell Cu/Au nanoparticles were synthesized by a one pot method, their peroxidase activity was proved by catalysing the oxidation of 3,3′,5,5′-tetramethylbenzidine with colour change to blue. Results showed a good range and limit for the detection of glucose and GSH.

Amorphization‐Modulated Metal Sulfides with Boosted Active Sites and Kinetics for Efficient Enzymatic Colorimetric Biodetection

“…Therefore, a new glucose biosensor has been developed by combining the high specificity of GOx with a remarkable a-RuS S8, Supporting Information). [6,76,77] In addition, the interference-resistant of a-RuS 2 has been revealed by using interfering compounds including glucose analogs, ions, and glutathione (Figure 7f), and the results demonstrate that the detection system has great glucose selectivity. In addition, to evaluate the practicality of a-RuS 2 in glucose detection, recovery experiments is performed in fetal bovine serum.…”

“…In addition, a good linear relationship appears between absorbance and glucose concentration (0–800 × 10 −6 m ), and the LOD is 9.84 × 10 −6 m , lower than that of recently reported enzymatic biodetection systems (Figure 7d,e; Table S8, Supporting Information). [ 6,76,77 ] In addition, the interference‐resistant of a‐RuS 2 has been revealed by using interfering compounds including glucose analogs, ions, and glutathione (Figure 7f), and the results demonstrate that the detection system has great glucose selectivity. In addition, to evaluate the practicality of a‐RuS 2 in glucose detection, recovery experiments is performed in fetal bovine serum.…”

Fabrication of a Novel Optical Glucose Biosensor Using Copper(II) Neocuproine as a Chromogenic Oxidant and Glucose Dehydrogenase-Immobilized Magnetite Nanoparticles

“…As seen in Table , colorimetric glucose biosensor studies based on different strategies have been carried out. The most commonly used among them is the colorimetric sensor based on the formation and measurement of the absorbance of TMB with different nanomaterials showing peroxidase-like properties. − Compared to these methods, the LOD value of the novel CUPRAC–GDH-based biosensor was generally found to be close to or even lower than the values reported in some of these studies. It is seen that the LOD value of the GDH–CUPRAC-based biosensor was also found to be lower than those of biosensors based on ABTS, , I 2 -starch, o -dianisidine, FeSCN 2+ including Fenton reaction, and CUPRAC reagents, which is quite similar to our study but using the GOx enzyme.…”

A Facile Preparation of Reduced Graphene Oxide Capped AuAg Bimetallic Nanoparticles: A Selective Nanozyme for Glutathione Detection

“…For example, Sun et al established core-shell Cu/Au nanoparticles (Cu/Au NPs) as a nanozyme for the detection of the GSH with the linear range of of 0.07 to 1.43 mM. [46] The reported LOD of GSH using Cu/Au NPs is 13 μM which is suitable for the sensing application for GSH detection.…”

“…To the best of our awareness, there are only a few reports on GSH detection utilizing bimetallic NPs incorporated on reduced graphene oxide sheets in an aqueous medium. For example, Sun et al established core–shell Cu/Au nanoparticles (Cu/Au NPs) as a nanozyme for the detection of the GSH with the linear range of of 0.07 to 1.43 mM [46] . The reported LOD of GSH using Cu/Au NPs is 13 μM which is suitable for the sensing application for GSH detection.…”