Paper as active layer in inkjet-printed capacitive humidity sensors

Cristina Gaspar, Juuso Olkkonen, Soile Passoja, Maria Smolander

    Research output: Contribution to journalArticleScientificpeer-review

    44 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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