Fig. 1: Illustration of highly sensitive H2S detection via a hybrid molecule nano-array.
From: Femtomolar hydrogen sulfide detection via hybrid small-molecule nano-arrays
a The design of a hybrid molecule nano-array for H2S detection, involving F12+, RB, and cyclodextrin (CD) molecules. During the process of H2S detection, the spots within the molecule array transition from the fluorescence “off” state to an “on” state. By integrating the fluorescence intensity (INTEN method) at high concentrations or counting the number of the “on” spots (NUMB method), the correlation with H2S concentration can be established. b The chemical equation of F12+ to F2 reduced by H2S. c The typical fluorescent image of the array and the corresponding correlation spots obtained by INTEN and NUMB methods at high H2S concentration and low concentration respectively.
