Rapid and scalable synthesis of sulfur quantum dots through ozone etching: photoluminescence and FRET-mediated Co²⁺ sensing

Abstract

Sulfur quantum dots (SQDs), an emerging class of zero-dimensional luminescent nanomaterials, are envisioned to excel over traditional compound quantum dots in various practical applications. Herein, we introduce a green and...

Facile Light-Driven Synthesis of Highly Luminous Sulfur Quantum Dots for Fluorescence Sensing and Cell Imaging

“…To investigate the variation of S 2− during the light-driven reaction, the UV absorption spectra of the mixtures at different reaction times were tested. As shown in Figure 4B, an absorption peak at 298 nm appeared as the reaction progressed and the resulting solution exhibited a yellow color, which is attributed to the generation of S x 2− , 25,48 indicating that the prereaction is mainly oxidation of S 2− to S x 2− . As the illumination continued, the yellow color of the mixture gradually deepened and the absorption peak at 298 nm weakened, revealing the further oxidation of S x 2− to elemental sulfur.…”