Optical fluorescent sensor based on perovskite QDs for nitric oxide gas detection.

In this paper, a new, to the best of our knowledge, optical fluorescent sensor for the sensing of nitric oxide (NO) gas is developed. The optical NO sensor based on perovskite quantum dots (PQDs) is coated on the surface of filter paper. The PQD sensing material can be excited with a UV LED of a central wavelength at 380 nm, and the optical sensor has been tested in regard to monitoring different NO concentrations from 0-1000 ppm.

A Ratiometric Optical Dual Sensor for the Simultaneous Detection of Oxygen and Carbon Dioxide.

Simultaneous detection of carbon dioxide (CO) and oxygen (O) has attracted considerable interest since CO and O play key roles in various industrial and domestic applications. In this study, a new approach based on a fluorescence ratiometric referencing method was reported to develop an optical dual sensor where platinum (II) meso-tetrakis(pentafluorophenyl)porphyrin (PtTFPP) complex used as the O-sensitive dye, CdSe/ZnS quantum dots (QDs) combined with phenol red used as the CO-sensitive dye, and CdSe/ZnS QDs used as the reference dye for the simultaneous detection of O and CO. All the dyes were immobilized in a gas-permeable matrix poly (isobutyl methacrylate) (PolyIBM) and subjected to excitation using a 380 nm LED.