Oxidant-resistant imaging and ratiometric luminescence detection by selective oxidation of silver nanodots.

Reactive oxygen species selectively accelerated transitions between various silver nanodots. The blue was developed as an oxidant-resistant imaging agent and analyte reporter. In addition to the spectral response of nanodots to ROS, silver nanodots were formulated to detect analytes with excellent selectivity and picomolar detection limit when coupled to glucose oxidase.