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Updated: Jul 16, 2026

Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
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Femtosecond Laser-Induced Graphene Modified with Platinum Nanoparticles for Advanced Multifunctional Sensing.

Jie Zhan1, Mingle Guan1,2, Zi Wang1

  • 1Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.

Sensors (Basel, Switzerland)
|July 15, 2026
PubMed
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Flexible sensors fabricated using laser-induced graphene (LIG) and platinum nanoparticles (PtNPs) show enhanced performance. This rapid method creates highly sensitive strain and temperature sensors for wearable health monitoring and environmental sensing.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Sensor Technology

Background:

  • Flexible sensors are crucial for wearable health monitoring, strain detection, and temperature sensing due to their adaptability.
  • Laser-induced graphene (LIG) offers a promising platform for flexible electronics, but its properties can be further enhanced.
  • Nanoparticle modification is a key strategy to improve the conductivity and sensitivity of graphene-based sensors.

Purpose of the Study:

  • To develop a rapid and mask-free method for fabricating functionalized flexible sensors.
  • To enhance the performance of laser-induced graphene (LIG) by incorporating platinum nanoparticles (PtNPs).
  • To create highly sensitive strain and temperature sensors for advanced applications.

Main Methods:

  • Fabrication of porous laser-induced graphene (LIG) using a femtosecond laser direct scanning method.
Keywords:
femtosecond laserlaser-induced graphene (LIG)multifunctional sensorsplatinum nanoparticles (PtNPs)

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  • Modification of LIG with platinum nanoparticles (PtNPs) to form Pt/LIG composites.
  • Characterization of the Pt/LIG material and fabrication of strain and temperature sensors.

    • Main Results:

    • The Pt/LIG composite exhibited significantly improved electrical conductivity with a sheet resistance of 2.41 Ω/sq.
    • Strain sensors demonstrated a high sensitivity (ΔR/R₀ of 1141.8 at 90° bending) and rapid response/recovery times (36/56 ms).
    • Temperature sensors showed enhanced sensitivity (650% improvement) with a temperature coefficient of resistance of 0.240%/°C.

    Conclusions:

    • A fast and precise method for creating nanoparticle-graphene composites for flexible electronics was established.
    • The Pt/LIG sensors show excellent potential for high-performance wearable health monitoring and environmental sensing.
    • This approach offers a versatile strategy for simultaneous patterning and functionalization of flexible sensor devices.