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<p>To enable effective monitoring of human physiological signals, this study fabricates a piezoresistive flexible pressure sensor using a composite of Ti<sub>3</sub>AlC<sub>2</sub> (a type of MXene material) and NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub> as the sensing material. The structure of Ti<sub>3</sub>AlC<sub>2</sub> before and after composite formation was observed via scanning electron microscopy, while x-ray diffraction, x-ray photoelectron spectroscopy, and energy-dispersive x-ray spectroscopy characterizations were conducted. Based on these analyses, the binding behavior between Ti<sub>3</sub>AlC<sub>2</sub> and NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>, as well as the mechanism underlying the enhanced sensing performance, were elucidated. The mechanism underlying the enhanced pressure response was further analyzed from the perspective of heterojunctions. In pressure testing, the as-fabricated pressure sensor demonstrates outstanding performance, including a high sensitivity of 2.46%/kPa within the range of 0–30&#xa0;kPa and a rapid response time of 0.2&#xa0;s. It has also successfully detected scenarios including wrist flexion, pulse beats, and fist clenching, thereby demonstrating promising application potential in physiological signal monitoring.</p>

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Research on the Preparation and Performance of Flexible Pressure Sensors Based on Ti3AlC2@NaKC4H4O6

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Song Li,
  • Zhenyu Chen,
  • Xingang Chen,
  • Kang liu,
  • Lintao Ma,
  • Yi Ao

摘要

To enable effective monitoring of human physiological signals, this study fabricates a piezoresistive flexible pressure sensor using a composite of Ti3AlC2 (a type of MXene material) and NaKC4H4O6 as the sensing material. The structure of Ti3AlC2 before and after composite formation was observed via scanning electron microscopy, while x-ray diffraction, x-ray photoelectron spectroscopy, and energy-dispersive x-ray spectroscopy characterizations were conducted. Based on these analyses, the binding behavior between Ti3AlC2 and NaKC4H4O6, as well as the mechanism underlying the enhanced sensing performance, were elucidated. The mechanism underlying the enhanced pressure response was further analyzed from the perspective of heterojunctions. In pressure testing, the as-fabricated pressure sensor demonstrates outstanding performance, including a high sensitivity of 2.46%/kPa within the range of 0–30 kPa and a rapid response time of 0.2 s. It has also successfully detected scenarios including wrist flexion, pulse beats, and fist clenching, thereby demonstrating promising application potential in physiological signal monitoring.