Robust and facile label-free colorimetric aptasensor for ochratoxin A detection using aptamer-enhanced oxidase-like activity of MnO2 nanoflowers

Sensitive microscale thermophoresis assay for rapid ochratoxin A detection with fluorescently labeled engineered aptamer

“…The detection limit of the aptamer MST assay for OTA is lower than or comparable to some of the reported aptamer-based methods, [40][41][42][43][44] but higher than those of the electrochemical sensors using strand-displacement polymerase reaction, 45 and of some methods using nanomaterials to achieve signal amplification (Table S5 †). 46,47 Compared with other methods, this aptamer MST assay shows many advantages. MST analysis requires only a simple mixing and measuring step without complex and time-consuming procedures of electrode and nanomaterial fabrication.…”

Synthesis of MnO2 sub-microspheres with effective oxidase-mimicking nanozymes for the colorimetric assay of ascorbic acid in orange fruits and juice

“…37,38 Manganese oxide nanoparticles have recently been used as nanozymes, gaining popularity due to their ability to mimic enzymes. [39][40][41] Manganese dioxides of various morphologies, such as MnO 2 nanosheets, 37 BSA-templated MnO 2 nanoparticles, 42 MnO 2 nanorods, 43 MnO 2 nanowires, 44 MnO 2 nanoflowers, 45 MnO 2 nanobelts, 46 MnO 2 nanoflakes 47 and MnO 2 microspheres, 48 have been used as nanozymes.…”

DNA-Mediated Graphene Oxide/Platinum Nanozymes for Label-Free Colorimetric Detection of Hg2+

“…16−18 Comparatively, colorimetry is a more favorable method because of its simplicity, visualization, and costeffectiveness. 19 Recently, nanozymes (nanomaterials with enzyme-mimicking properties) have been widely used as colorimetric sensors in food, 20 and environmental monitoring, 21 medical diagnosis, and imaging. 22,23 The nanozyme-based colorimetric sensors have excellent analytical performance because of their catalytic ability and signal amplification properties.…”

“…Recently, nanozymes (nanomaterials with enzyme-mimicking properties) have been widely used as colorimetric sensors in food, and environmental monitoring, medical diagnosis, and imaging. , The nanozyme-based colorimetric sensors have excellent analytical performance because of their catalytic ability and signal amplification properties . Furthermore, by controlling the composition, size, and morphology of the nanozymes, their catalytic activities can be modulated to meet different needs. , Among various nanozymes, platinum nanoparticles (PtNPs) have received much attention because they show catalytic activity for a variety of reactions. − PtNPs have been used as mainstream nanoparticle enzymes to catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), producing an amplified colorimetric recognition signal .…”