A rapid and sensitive colorimetric sensor for hypochlorite detection based on polyvinylpyrrolidone-stabilized gold nanoparticles

Abstract

It is important to develop simple and effective techniques for hypochlorite (OCl–) detection at trace levels due to its widespread use as a disinfectant especially for water treatments including drinking...

A paper-based point-of-care device for the detection of cysteine using gold nanoparticles from whole blood

“…This interaction causes the AuNPs to aggregate, resulting in changes to the absorption spectrum. 48 The shift in the absorption peak from 525 nm to 530 nm is due to the increase in proximity and interaction amongst the AuNPs (Fig. 3B).…”

Ligand-Induced Red-Emitting Copper Nanoclusters for Selective Fluorescence Determination of Aluminum Ions

“…The aggregation of CuNCs after the introduction of Al 3+ ions indicated that the possible mechanism of fluorescence enhancement was caused by AIE that increases fluorescence intensity and prolongs luminescence lifetime. 62,63 The fluorescence enhancement mechanism of Al 3+ ions on NAC-CuNCs was further studied. The average fluorescence lifetime of CuNCs was increased from 0.79 to 3.80 μs after the addition of Al 3+ ions (Figure 5C).…”