“…Compared to them, carbon dots (CDs) show unique advantages based on their rapid response, low toxicity and high sensitivity [26]. Therefore, CDs can be used as sensors for fast, efficient and sensitive detection of metal ions like iron(III) ion (Fe 3+ ) and small molecules such as propiconazole (PC), deltamethrin (DLM) and fenvalerate (FV) [27,28], para-nitrophenol, β-glucosidase, sunset yellow and folic acid [29][30][31]. In addition, CDs that emit different colors of light also have potential applications in fluorescent inks, light-emitting diodes (LEDs), cell imaging and sensor components [32].…”