Ecoresorbable Radio-Frequency Platform for Humidity and Temperature Sensing
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Author
James Bourely, Jaemin Kim, Xavier Aeby, Gilberto Siqueira, Gustav Nyström, Oleksandr Vorobyov, Christian Beyer, David Schmid, Danick Briand, Oleksandr Vorobyov
DOI
https://doi.org/ 10.3390/proceedings2024097074
Abstract
Aiming to reduce electronic waste in sensing applications, we report on an eco-friendly
printed microstrip line to sense relative humidity (RH) and temperature. The device is made of zinc
resonators on paper used as transducers, which are coated with beeswax as an encapsulant, and
uses konjac as a humidity sensitive coating. The multi-resonating structure, operating in the S-band,
shows reproducible temperature and humidity sensing from 15 ◦C to 35 ◦C and 30% to 70% RH with
sensitivities up to 1.9 MHz/◦C and 2.0 MHz/%RH, respectively. This combination of transducing
and sensing materials is promising for the realization of disposable environmental sensors
Publication Reference
MDPI
Year
2024-03-22
Sponsors
SwissNational Science Foundation and the Innosuisse BRIDGE Discovery Programfor the project “GREENsPACK—Green Smart Packaging”, grant number 187223.