Development of two-dimensional MXene nanosheet-based electrodes via screen printing for low-frequency antenna applications

초록

In this study, an omnidirectional low-frequency monopole patch antenna was fabricated using MXene nanosheets and screen-printing technology. Ti3C2Tx MXene was synthesized by selectively etching Al from Ti3AlC2 MAX using hydrofluoric acid, followed by exfoliation to obtain nanosheets. A conductive MXene nanosheet-based paste was screen-printed onto a flexible substrate, forming high-resolution electrode patterns. The resulting electrodes exhibited a low surface resistance of 102 Omega sq-1 and maintained stability for over six months. The fabricated antenna demonstrated a mean frequency of 1.5 GHz, a low return loss of -21.90 dB, and a radiation efficiency of 30.33%. Furthermore, the screen-printing process enabled flexible electrode dimension adjustment, allowing effective mean frequency tuning. These findings demonstrate the feasibility of MXene nanosheet-based antennas for low-frequency RF applications, including next-generation wireless communication technologies.

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