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<p>Laser-induced graphene (LIG) has attracted considerable attention as a promising material for flexible sensors due to its exceptional mechanical properties and excellent conductivity. These sensors, known for their ultrathin, lightweight, and stretchable characteristics, are becoming increasingly important in wearable technology. Traditional pressure sensors often face challenges in balancing high sensitivity with a wide operational range, which limits their applicability. This study presents a novel pressure sensor fabricated through infrared laser engraving on polyimide (PI) film, utilizing a photothermal process to create LIG. The method is straightforward, environmentally friendly, and cost-effective, eliminating the need for reducing agents or solvents. Among the three sensor prototypes tested, the sensor labeled (S) demonstrated the highest sensitivity at both low (−0.0024&#xa0;Pa<sup>−1</sup>) and high pressures (−0.0018&#xa0;Pa<sup>−1</sup>). The deformation of the sensor under pressure resulted in increased output voltage, confirming its high sensitivity and reliability. These advanced pressure sensors show promise for various healthcare applications. Notably, this sensor achieves high sensitivity at low pressures, particularly relevant for vital sign monitoring applications, including heart rate monitoring and tactile sensing.</p>

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A Novel pressure sensors fabricated from laser-induced graphene on polyimide film: A step towards advanced wearable technology

  • 期刊论文

  • 发表日期：

    2025年6月21日

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  • Ghofran Sattar Jabbar,
  • Mariam Mohamed Abud,
  • Mohand M. Azzawi

摘要

Laser-induced graphene (LIG) has attracted considerable attention as a promising material for flexible sensors due to its exceptional mechanical properties and excellent conductivity. These sensors, known for their ultrathin, lightweight, and stretchable characteristics, are becoming increasingly important in wearable technology. Traditional pressure sensors often face challenges in balancing high sensitivity with a wide operational range, which limits their applicability. This study presents a novel pressure sensor fabricated through infrared laser engraving on polyimide (PI) film, utilizing a photothermal process to create LIG. The method is straightforward, environmentally friendly, and cost-effective, eliminating the need for reducing agents or solvents. Among the three sensor prototypes tested, the sensor labeled (S) demonstrated the highest sensitivity at both low (−0.0024 Pa−1) and high pressures (−0.0018 Pa−1). The deformation of the sensor under pressure resulted in increased output voltage, confirming its high sensitivity and reliability. These advanced pressure sensors show promise for various healthcare applications. Notably, this sensor achieves high sensitivity at low pressures, particularly relevant for vital sign monitoring applications, including heart rate monitoring and tactile sensing.