Screen-printing of core-shell Mn3O4@C nanocubes based sensing microchip performing ultrasensitive recognition of allura red

Allura red (AR) is a member of azo dyes is commonly used as an additive in foods and soft drinks. However, due to the special harm of the azo structure to the human body, the dosage control of AR becomes particularly necessary. The present detection methods are time-consuming, expensive and complicated. In order to address the above issues, a core-shell nanocubes constructed sensor has been developed to determine the ultrawide detection range and selective recognition of AR with a long-term reusability. The core-shell architecture is composed of carbon material of 12.64 nm thickness covering 600 nm Mn(3)O(4)nanocube. This nanocomposite combines the advantages of Mn3O4@C, possessing high electrocatalysis and chemical stability. As confirmed in using sports drinks as real samples, the as-prepared AR sensor exhibites excellent selectivity with an ultra-wide linear range from 0.1 to 1748.4 mu M, and meanwhile, this sensor can also meet the requirements of remarkable anti-interference and reusability over 30 days.

Automated summary

Allura red (AR) is commonly used as a food and soft drink additive, but due to the special harm of the azo structure to the human body, dosage control is necessary. To address the issues of time-consuming, expensive, and complicated detection methods, a core-shell nanocube sensor has been developed for ultrawide detection range and selective recognition of AR. This sensor exhibits excellent selectivity with an ultra-wide linear range and remarkable anti-interference and reusability over 30 days.