Читать книгу Sustainable Nanotechnology - Группа авторов - Страница 28

An intelligent packaging system focuses on monitoring the conditions and quality of food products during the distribution and storage stage of the supply chain and intends on delivering this information to the consumer of the product. Intelligent packaging systems can be distributed in four categories: data carriers, quality indicators, sensors, and others such as organic light‐emitting diodes (OLEDs) and holograms [84]. Nano‐based communication devices such as Radio Frequency Identification (RFID) tags and a barcode with wireless sensors could be used to provide product authenticity, anti‐theft, anti‐counterfeiting [85], and product traceability [86]. For instance, a wireless RFID sensor tag consisting of two planar inductor‐capacitor resonators to monitor relative humidity has shown a sensitivity range of 20–70%.

This system could be integrated into the RFID sensors of conventional packaging machines [87]. ZnO nanoparticle and polyvinylpyrrolidone (PVP)‐based luminescent films also showed the capability of sensing the status of food substrates by the intensity of their luminescence [88]. In addition, the use of quantum dots and graphene to develop a chip‐based sensor to detect oil samples exhibits the capability to differentiate between various oil samples in a laboratory setting. Compared to the conventional methods of high‐performance liquid chromatography (HPLC), this system was able to discriminate between eight different unknown oil samples with an accuracy of 92.5% [89].