Paper as active layer in inkjet-printed capacitive humidity sensors

Cristina Gaspar, Juuso Olkkonen, Soile Passoja, Maria Smolander

Research output: Contribution to journalArticleScientificpeer-review

34 Citations (Scopus)

Abstract

An inkjet-printed relative humidity sensor based on capacitive changes which responds to different humidity levels in the environment is presented in this work. The inkjet-printed silver interdigitated electrodes configuration on the paper substrate allowed for the fabrication of a functional proof-of-concept of the relative humidity sensor, by using the paper itself as a sensing material. The sensor sensitivity in terms of relative humidity changes was calculated to be around 2 pF/RH %. The response time against different temperature steps from 3 to 85°C was fairly constant (about 4-5 min), and it was considered fast for the aimed application, a smart label.
Original languageEnglish
Article number1464
JournalSensors
Volume17
Issue number7
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • humidity sensor
  • inkjet printing
  • nanoparticles
  • paper
  • silver
  • OtaNano

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