Yin Mengqing, Wu Liqiong, Chen Hua, Zhang Xiaohui, Wang Wei, Liu Zhaoping
School of Information Science and Engineering, Ningbo University, 315201, People's Republic of China.
Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang 315201, People's Republic of China.
Nanotechnology. 2022 Oct 3;33(50). doi: 10.1088/1361-6528/ac8e74.
Ultra-high frequency (UHF) radio frequency identification (RFID) tags need to be attached or embedded to objects in various environments to achieve non-contact automatic identification. Graphene shows unique electrical and optical properties, which makes it become a promising material for radio frequency devices. In this paper, the transparent UHF RFID tags were fabricated based on graphene films with different number of stacked layers prepared by chemical vapor deposition (CVD). Through structural design, parameter optimization and experimental measurements, the reading distance of the transparent RFID tags was tested and compared. As the graphene film stacked layers increased, the reading distance of graphene-based RFID tags was farther. The UHF RFID tag based on the CVD-grown graphene with the light transmittance of 88% reached the maximum reading distance of 2.78 m in the frequency range of 860-960 MHz. In addition, the reading distance of graphene-based RFID tags at different bending angles and cycles was measured. The results reveal transparent graphene-based RFID tags have good flexibility and stability and can be used in flexible transparent devices.
超高频（UHF）射频识别（RFID）标签需要附着或嵌入到各种环境中的物体上，以实现非接触式自动识别。石墨烯具有独特的电学和光学特性，这使其成为用于射频器件的一种很有前景的材料。在本文中，基于通过化学气相沉积（CVD）制备的具有不同堆叠层数的石墨烯薄膜，制造了透明UHF RFID标签。通过结构设计、参数优化和实验测量，对透明RFID标签的读取距离进行了测试和比较。随着石墨烯薄膜堆叠层数的增加，基于石墨烯的RFID标签的读取距离更远。基于CVD生长的、透光率为88%的石墨烯的UHF RFID标签在860 - 960 MHz频率范围内达到了2.78 m的最大读取距离。此外，还测量了基于石墨烯的RFID标签在不同弯曲角度和循环次数下的读取距离。结果表明，基于透明石墨烯的RFID标签具有良好的柔韧性和稳定性，可用于柔性透明器件中。
