Novel fluorescence-based and portable detection platforms using nitrogen-doped carbon dots for environmental monitoring of dichloran fungicide.

A novel fluorescence sensor utilizing label-free nitrogen self-doped carbon dots (NCDs) was developed for the sensitive, selective, and rapid determination of dichloran fungicide, popularly used in agricultural and horticultural fields. The NCDs were prepared from maleic anhydride and diethylenetriamine via a one-step pyrolysis process. They demonstrated strong blue fluorescence emission with a quantum yield of 12 %.

Facile fabrication of 17β-estradiol electrochemical sensor using polyaniline/carbon dot-coated glassy carbon electrode with synergistically enhanced electrochemical stability.

Previous 17β-estradiol sensors required expensive reagents or complicated fabrication of sensing probes. In this work, a cheap, simple, and reusable electrochemical sensor based on commercially available polyaniline (PANI) and carbon dots (CDs) synthesized from iota-carrageenan was developed for the sensitive detection of 17β-estradiol. The sensor was simply prepared by drop-casting CDs/PANI composite on a glassy carbon electrode (GCE) using poly(vinylidene fluoride) as a binder.

Multipurpose sensing applications of biocompatible radish-derived carbon dots as Cu and acetic acid vapor sensors.

A recent trend in the preparation of carbon dots, optically unique nanomaterials, revolves around the use of readily-available, low-cost natural resources as precursors and their multipurpose applications. In this work, a hydrothermal method for preparing biocompatible carbon dots from radish was developed. The carbon dots were then tested for sensing of Cu and acetic acid vapor.