Benefiting from the high conductivity and superb flexibility, graphene‐based materials are promising to replace metal for near‐field communication (NFC) applications. Herein, we report a flexible NFC tag antenna based on high‐conductivity graphene‐assembled films (HCGAFs) and investigate how the performance of the antenna is affected by antenna design and human body effect. The fabricated prototype via a one‐step laser‐direct mold engraving method shows a 10 dB bandwidth of 2.5 MHz centering at 13.70 MHz with a quality factor (Q) of 9.19. The maximum read range of the HCGAF NFC tag is measured to be around 7.5 cm, comparable to the commercially available metal NFC tags. Moreover, the flexible nature of HCGAFs guarantees excellent mechanical stability and deformation insensitivity, especially when compared to commercial metal‐based counterparts. We further demonstrate the practical applications of the HCGAF tag as key card and electronic business card in the vicinity of human body.

中文翻译：

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基于高导电性石墨烯组装薄膜的可穿戴近场通信手链

得益于高导电性和出色的柔韧性，基于石墨烯的材料有望替代金属以用于近场通信（NFC）应用。本文中，我们报告了一种基于高导电性石墨烯组装膜（HCGAF）的柔性NFC标签天线，并研究了天线的性能如何受到天线设计和人体影响的影响。通过一步激光直接模具雕刻法制造的原型显示出以13.70 MHz为中心的2.5 dB的10 dB带宽，品质因数（Q）的9.19。HCGAF NFC标签的最大读取范围经测量约为7.5 cm，与市售的金属NFC标签相当。此外，HCGAF的柔韧性确保了出色的机械稳定性和变形敏感性，特别是与商业金属基同类产品相比。我们进一步演示了HCGAF标签作为钥匙卡和电子名片在人体附近的实际应用。