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Related Experiment Video

Updated: Dec 9, 2025

Hybrid Printing for the Fabrication of Smart Sensors
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Large-Area Thermal Distribution Sensor Based on Multilayer Graphene Ink.

Tomi Koskinen1, Taneli Juntunen1, Ilkka Tittonen1

  • 1Department of Electronics and Nanoengineering, Aalto University, P.O. Box 13500, FI-00076 Aalto, Finland.

Sensors (Basel, Switzerland)
|September 16, 2020
PubMed
Summary
This summary is machine-generated.

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This study presents a scalable, low-cost thermal sensor for wearable electronics using multilayer graphene ink. The device demonstrates effective touch sensing and shape detection through thermal mapping, paving the way for advanced electronic applications.

Area of Science:

  • Materials Science
  • Electronics Engineering
  • Nanotechnology

Background:

  • Wearable electronics demand cost-effective, manufacturable sensors.
  • Existing sensors often face limitations in scalability and material properties.
  • Thermoelectric materials offer passive sensing capabilities suitable for integration.

Discussion:

  • A large-area thermal sensor was developed using a distributed thermocouple architecture and ink-based multilayer graphene.
  • The Seebeck coefficient showed an inverse thickness dependence, with thinner films (78 nm) yielding optimal performance (44.7 μV K⁻¹).
  • The device demonstrated touch sensing and thermal mapping for shape detection with a signal-to-noise ratio of 35.

Key Insights:

  • Ink-based multilayer graphene films are suitable for thermoelectric sensing.
Keywords:
flexiblegraphenesensorthermoelectric

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  • Thinner graphene films enhance the Seebeck coefficient for sensor applications.
  • The sensor achieved accurate shape detection via thermal distribution mapping.

    • Outlook:

    • This technology facilitates scalable manufacturing of graphene-based thermoelectric sensors.
    • The facile integration of ink-based graphene enables broader applications in flexible electronics.
    • Further research can optimize graphene inks for enhanced sensor performance and novel functionalities.