One stone with four birds: Methylene blue decorated oxygen-vacancy-rich MnO2 nanosheets for multimode detection of ascorbic acid

Light-Responsive Carbon Nitride Based Atomic Cu(I) Oxidase Mimics for Dual-Mode Total Antioxidant Capacity Assay

“…Exogenous antioxidants are presented in foods and are beneficial to human health consumed in daily diet. − The evaluation of TAC in foods is of continuous interest. Complicated color-fading pathways of TMB ox , including competitive contact of catalytic active sites, decomposition of nanozymes, consumption of H 2 O 2 , reduction of TMB ox , and so on, retards the understanding of detection mechanism in previous works.…”

“…On the other hand, an important and extensible light-stimuli use is the innovative detection method based on photothermal effect. ,, Some nanomaterials and molecules can absorb light of a specific wavelength and therefore convert it into heat, during which photothermal-effect-induced heat can be quantitatively detected using a portable thermometer. The typical colorimetric system based on nanozyme + TMB shows good photothermal conversion performance, which was first verified and applied as a photothermal immunoassay platform by Li.…”

Ultrasensitive Fluorescence Detection of Ascorbic Acid Using Silver Ion-Modulated High-Quality CdSe/CdS/ZnS Quantum Dots

“…At present, a variety of methods have been put forward for AA testing, including electrochemical, − chemiluminescence, electrochemiluminescence, high-performance liquid chromatography, colorimetric, − and so on. However, most of these methods are limited by the complexity of operations, time consumption, and expensive equipment.…”

A ratiometric fluorescence method based on silicon nanoparticles/o-phenylenediamine/MnO2 nanosheet systems for vitamin C detection

“…Recently, various methods have been developed for the detection of VC, such as high performance liquid chromatography (HPLC), 5 electrochemical methods, 6,7 colorimetric methods [8][9][10] and fluorescence methods. 2,[11][12][13] Among these, fluorescence methods have attracted much attention owing to their advantages of high sensitivity, rapid response, convenient operation and inexpensive instruments. So far, some fluorescence methods have been reported for VC detection.…”