Radio-frequency identification (RFID) tech embedded with graphene sensors has proven a success, due to researchers at The University of Manchester.
To create a flexible heterostructure, the team layered a derivative of graphene, known as graphene-oxide, over graphene. This process led to the development of remote sensing humidity sensors, capable of connecting to wireless networks.
Graphene and other 2D materials are suited to create efficient, high-performance structures built for targeted applications, since scientists can layer these materials in a selected order.
The new device collects its power from the receiver, so no external battery source is required. The UK development also promotes scalable and low-cost production, since the sensors can be printed layer-by-layer.
“It is the first example of the printable technology where several 2D materials come together to create a functional device immediately suitable for industrial applications. The Internet of Things is the fast growing segment of technology, and I’m sure that 2D materials will play an important role there,” says Professor Sir Kostya Novoselov, Nobel Prize in Physics winner and coordinator of the project.
Sensors embedded into RFIDs have a strong presence in the IoT domain. Manufacturing methods focused on food safety, medical care, and nuclear waste could benefit from smart wireless monitoring that works without a battery. The technique could also streamline data collection and work alongside WiFi and 5G networks.
“The excitement does not end with this new application here, but leads to the future possibilities of integrations of this technique with other 2D materials to open up a new horizon of wireless sensing applications,” says Dr. Zhirun Hu, leader of the research.
To learn more, read the full article entitled “Graphene Oxide Dielectric Permittivity at GHz and Its Applications for Wireless Humidity Sensing,” published in Scientific Reports.