Study on the optical responsiveness of carbon dots to organic amines

Abstract

Carbon dots(CDs) is an advanced new carbonbased nanomaterial, which has an excellent performance in microimaging, biosensing, chemical sensing, and catalysis. In recent years, food poisoning incidents caused by organic amines exceeding the standard in seafood are common. Numerous studies have shown that putrescine is the most common organic amine in corrupt seafood and is highly toxic, threatening human life and health. In order to give full play to the excellent chemical sensing capability of CDs, this study applies CDs synthesized from raw materials such as o-Phenylenediamine (OPD) to the sensing of organic amines and studies the sensing performance of CDs in the optical signal. At room temperature (35% -40% relative humidity), putrescine is easy to combine with water molecules in the air to produce a smoke effect. As the homemade CDs film in contact with the combination and produce significant color changes, the dark blue area immediately shallow, thus judging the presence of putrescine. Because the response mechanism is simple and clear, the optical signal is clear and easy to judge, the response is quick and does not require professional and technical support, so this response mechanism can be applied in the aquaculture and other fields, which helps to reduce the threat caused by corrupt seafood, and protect people's lives and health.