Researchers at the Technical University of Munich in Germany are developing a low-cost gas sensor that can be used in large-scale industrial production, which can be installed inside food packaging bags to evaluate the freshness of food, or used in wireless monitoring of air quality. This element is made of carbon nanotubes and is sprayed onto plastic packaging or other substrates like ink.
The carbon nanotube gas sensor developed by researchers at the Technical University of Munich combines a variety of unique characteristics that cannot be achieved by other technologies. They can quickly detect and continuously track the very slight changes in the content of ammonia, carbon dioxide and nitrogen oxides. In addition, they can work indoors and consume very little energy. In addition, through the introduction of researchers in the Technical University of Munich in the paper, this sensor can also be incorporated into flexible packaging materials, making people ’s previous ideas about food packaging bags with flexible, reusable gas sensors become a reality This sensor can provide a more meaningful indicator of food freshness than the shelf life. This intelligent packaging is safe and non-toxic, so it can be used to improve the safety of food and greatly reduce food waste.
Researcher Ayala Abdullah of Nanotechnology at the Technical University of Munich and colleagues have demonstrated that this high-performance gas sensor can be sprayed onto a soft plastic substrate like ink. As a result, researchers have opened the door for large-scale commercial applications of this carbon nanotube sensor.
The most basic material of this carbon nanotube is a cylindrical molecule, which is a scroll-shaped molecule composed of multiple carbon atoms in a honeycomb format. This carbon nanotube is a hollow tube with a diameter of only one nanometer, but a length of millions of nanometers. As the raw material of the gas sensor, this carbon nanotube has achieved advantages and disadvantages compared with the previously used materials such as high molecular organic electronic components and solid metal oxide semiconductors. What is lacking at present is a reliable and renewable An inexpensive method to apply this technology.
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