Multifunctional MnCo@C yolk-shell nanozymes with smartphone platform for rapid colorimetric analysis of total antioxidant capacity and phenolic compounds

Enhanced Peroxidase-Mimic Catalytic Activity via Cerium Doping of Strontium-Based Metal–Organic Frameworks with Design of a Smartphone-Based Sensor for On-Site Salivary Total Antioxidant Capacity Detection in Lung Cancer Patients

“…In addition, researchers have started addressing further nanozyme-related difficulties, such as their relatively weak catalytic activity and selectivity; numerous efforts have been undertaken in this regard, including surface modification, elemental doping, and morphological control. 43,44 As a result, nanozyme design involving simple synthetic procedures and powerful enzymatic activity capable of simultaneously detecting SET and HAT when assessing the TAC of human bodily fluids has become a popular research topic.…”

“…Yet, most current methods are insufficiently broad for accurately determining both hydrogen atom transfer (HAT)-functioning species (such as GSH and Cys) and single electron transfer (SET)-functioning species (such as AA). , Since various antioxidants interact together in the body, one cannot determine their number by detecting only a single type of antioxidant. In addition, researchers have started addressing further nanozyme-related difficulties, such as their relatively weak catalytic activity and selectivity; numerous efforts have been undertaken in this regard, including surface modification, elemental doping, and morphological control. , As a result, nanozyme design involving simple synthetic procedures and powerful enzymatic activity capable of simultaneously detecting SET and HAT when assessing the TAC of human bodily fluids has become a popular research topic.…”

Spherical Hydrogel Sensor Based on PB@Fe-COF@Au Nanoparticles with Triplet Peroxidase-like Activity and Multiple Capture Sites for Effective Detection of Organophosphorus Pesticides

“…Recently, multiple nanomaterials have been demonstrated to possess mimic enzyme activities that can oxidize a large number of chromogens to colored products. Therefore, colorimetric strategies based on nanozymes are considered to be potential solutions to improve sensitivity . In addition, artificial nanozymes with similar structures and functions to natural enzymes are superior to the latter in terms of cheap, high operational stability and durability. − Chu, Kushwaha, and Li et al have synthesized graphene oxides, Ag 3 PO 4 nanoparticles, and platinum nanoparticles as nanozymes to construct effective colorimetric sensing platforms for pesticides. − However, the nanozyme sensors often suffer from weaknesses of (i) low catalytic activity, (ii) long response time, and (iii) insufficient selectivity, making these sensors susceptible in on-site testing .…”

“…Therefore, colorimetric strategies based on nanozymes are considered to be potential solutions to improve sensitivity. 10 In addition, artificial nanozymes with similar structures and functions to natural enzymes are superior to the latter in terms of cheap, high operational stability and durability. 11−13 Chu, Kushwaha, and Li et al have synthesized graphene oxides, Ag 3 PO 4 nanoparticles, and platinum nanoparticles as nanozymes to construct effective colorimetric sensing platforms for pesticides.…”

Porous Fe/CeO2 Nanozyme-Based Hydrogel Colorimetric Platform for on-Site Detection of Kanamycin

“…At present, several methods for rapid antibiotic detection have been proposed, including fluorescence, colorimetric, and electrochemical analyses. , Among them, colorimetric analysis is a powerful tool due to its outstanding advantages of visualization and convenience. However, because of its poor stability and limited sensitivity, colorimetric detection performs poorly in real samples.…”