Recent advances in colorimetric sensors based on nanozymes with peroxidase-like activity

Abstract

Nanozymes have been widely used to construct colorimetric sensors due to their advantages of cost-effective, high stability, good biocompatibility, and ease of modification. The emergence of nanozymes greatly enhances the...

Exceptional peroxidase-like activity of an iron and copper based organic framework nanosheet for consecutive colorimetric biosensing of glucose and kanamycin in real food samples

“…Nevertheless, nanomaterial-based enzyme mimics, also known as nanozymes, have drawn more and more attention in the field of colorimetric sensors in recent times due to their superior stability, great catalytic activity, ease of preparation, and cost-effectiveness compared to natural enzymes. 9 In the past years, several nanomaterials that display incredible peroxidase-like activity have been reported. In 2007, researchers published the first evidence of the intrinsic peroxidase-mimicking activity of Fe 3 O 4 nanoparticles.…”

Peroxidase-Mimicking Hierarchically Organized Gold Particles for Glucose Detection

“…Kinetic studies showed that Au HOPs-10 followed the ping-pong multisubstrate mechanism like HRP. Finally, POD mimics were applied to the colorimetric detection of disease-related biomarkers. − …”

Peroxidase-like activity of biosynthesized silver nanoparticles for colorimetric detection of cysteine

“…Recently, colorimetric methods using nanomaterials with enzyme-mimic activities (nanozymes), as alternatives to the LSPR approach, have received intense attention in detection of various analytes. 15 Nanozymes mimic the function of natural enzymes with the added advantage of low cost, high stability, and surface tunability. [15][16][17] Nanozymes, like the natural enzymes, catalyze the conversion of substrates to oxidized colored products.…”

“…15 Nanozymes mimic the function of natural enzymes with the added advantage of low cost, high stability, and surface tunability. [15][16][17] Nanozymes, like the natural enzymes, catalyze the conversion of substrates to oxidized colored products. By keeping the concentration of the substrate constant, it is possible to develop a colorimetric method where the intensity of the colored products can be analyzed by the naked eyes or by absorption spectrophotometer.…”

“…Since 2007 aer the discovery 19 of the intrinsic peroxidase-like activity of Fe 3 O 4 , colorimetric methods using various nanozymes have been employed intensively. 15 Various nanomaterials including metal oxides, 20,21 metal-organic framework, 22 carbon-based materials, 23 hybrids materials 13,24 and metals [25][26][27][28][29] have shown enzyme-mimic activities and employed for determination of analytes of different interest.…”