Highly sensitive and rapid colorimetric sensing platform based on water-soluble WO quantum dots with intrinsic peroxidase-like activity.

This report outlines a rapid and highly sensitive colorimetric sensing platform based on a novel water-soluble WO quantum dots (QDs) as enzymatic mimics. The WO QDs, synthesized by a green hydrothermal method, were proven to possess excellent intrinsic peroxidase-like activity. The peroxidase substrate, 2, 2'-azinobis (3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt (ABTS) could be catalyzed oxidation by WO QDs quickly in the present of HO to form a green color.

Fabrication and multifunctional properties of ultrasmall water-soluble tungsten oxide quantum dots.

A facile and green method has been demonstrated to synthesize ultrasmall tungsten oxide quantum dots (WOx QDs). The water-soluble WOx QDs present high luminescence stability, strong peroxidase-like activity, and excellent electrochemiluminescence properties. This work provides an eco-friendly strategy to prepare multifunctional WOx QDs, and opens the door for bioapplications of the WOx QDs.