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Sensors

Sustainable Graphene-Based Sensors for Touch and Liquid Level Detection

Strategic Insights

— 1 min read

Researchers at the Indian Institute of Technology (IIT) Mandi have developed a novel, eco-friendly sensor using laser-induced graphene (LIG) on wooden substrates. This breakthrough in sustainability research offers a cost-effective, energy-efficient, and environmentally friendly solution for diverse applications, including touch detection and liquid level sensing. The LIG electrode graphene-based interdigitated capacitive (IDC) sensor has been optimized for maximum capacitance and sensitivity, demonstrating an average touch sensitivity of response Delta C/C0 of 31% in capacitive touch sensing.

Key Takeaways:

  • The researchers fabricated graphene layer on wood using laser technology, optimizing fabrication parameters to achieve maximum capacitance and sensitivity.
  • The graphene sensors demonstrated an average touch sensitivity of response Delta C/C0 of 31% in capacitive touch sensing, showcasing their practical utility in diverse applications.
  • The sensors serve as a proof-of-concept for sensor fabrication and operational mechanisms, intended for educational purposes due to their simple fabrication process and straightforward working principle.
  • The sensors' sensitivity in water level sensing has been measured to be 1.8 pF per cm.
  • The LIG electrode graphene-based IDC sensor can be integrated into various modern technologies and devices.
  • This research paves the way for the development of eco-friendly and economical sensors that align with global sustainability goals.

Statistics:

  • Average touch sensitivity of response Delta C/C0: 31%
  • Sensitivity in water level sensing: 1.8 pF per cm
  • Cost-effective and energy-efficient solution
  • Biodegradable materials used in sensor fabrication
  • Global sustainability goals aligned with sensor development

Sources:

  • NewsRx. Study Findings from Indian Institute of Technology (IIT) Mandi Broaden Understanding of Sustainability Research (Sustainable Sensor Technology: Laser-induced Graphene Based Capacitive Sensors On Wooden Substrates for Touch and Liquid Level ...). Ecology, Environment & Conservation. 2025; p 1522.
  • Flatchem. Sustainable Sensor Technology: Laser-induced Graphene Based Capacitive Sensors On Wooden Substrates for Touch and Liquid Level Detection. 2025; 52.

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