Rapid and sensitive determination of ascorbic acid based on label-free silver triangular nanoplates.

ABSTRACT: In this study, a new method for the detection of ascorbic acid (AA) was proposed. It was based on the protective effect of AA on silver triangular nanoplates (Ag TNPs) against Cl^- induced etching reactions. Cl^- can attack the corners of Ag TNPs and etch them, causing a morphological shift from triangular nanoplates to nanodiscs. As a result, the solution changes color from blue to yellow. However, in the presence of AA, the corners of Ag TNPs can be protected from Cl^- etching, and the blue color of the solution remains unchanged. Using this effect, a selective sensor was designed to detect AA in the range of 0-40.00 μM with a detection limit of 2.17 μM. As the concentration of AA varies in this range, color changes from yellow to blue can be easily observed

SUBMITTER: Qiao W 

PROVIDER: S-EPMC10391723 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature