Researchers Develop 3D-Printed Humidity Sensors using Triply Periodic Minimal Surfaces

Strategic Insights -

A team of researchers from Polytechnic University Torino has successfully created 3D-printed complex mullite structures using triply periodic minimal surfaces (TPMSs) to fabricate humidity sensors. The innovative design utilizes two different thicknesses of Schwartz and Gyroid structures, which were tested for their sensitivity to humidity levels. The results showed that the Gyroid 2 structure demonstrated the best response to humidity, achieving a response of 7.00 under 89% relative humidity (RH).

Key Takeaways:

  • The researchers used 3D printing to fabricate complex mullite structures based on TPMSs, specifically Schwartz and Gyroid surfaces.
  • The samples were tested in a range of humidity levels from 0% to 89% RH at room temperature to evaluate their sensitivity.
  • The Gyroid 2 structure exhibited the best response to humidity, with a response of 7.00 under 89% RH, compared to 2.84 for the Schwartz 1 structure and 1.21 for the Gyroid 1 structure.
  • The sensors showed good repeatability and did not interfere with other gases present in the environment.
  • Triply periodic minimal surfaces were used to design the complex mullite structures for the first time in the field of humidity sensing.
  • The research opens up new possibilities for the development of innovative humidity sensors using 3D printing and TPMSs.

Statistics:

  • The sensors were tested in a range of humidity levels from 0% to 89% RH.
  • The Gyroid 2 structure achieved a response of 7.00 under 89% RH.
  • The Schwartz 1 structure achieved a response of 2.84 under 89% RH.
  • The Gyroid 1 structure achieved a response of 1.21 under 89% RH.
  • The samples were sintered at 1450 °C.
  • The research was published in the journal Chemosensors, volume 13, issue 5, article 168, in 2025.

Sources:

  • "Triply Periodic Minimal Surfaces Mullite Structures for Humidity Detection." Chemosensors 13, no. 5 (2025): 168. doi:10.3390/chemosensors13050168.
  • NewsRx LLC, "Polytechnic University Torino Researchers Report Research in Chemical Sensors (Triply Periodic Minimal Surfaces Mullite Structures for Humidity Detection)." Chemicals & Chemistry (2025): p 2877.
  • VerticalNews, "New Study on Chemical Sensors Reported from Polytechnic University Torino." Chemicals & Chemistry (2025): p 2877.