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Inkjet-printed wireless passive humidity sensor with ultrahigh sensitivity using ZnO/Ti₃C₂Tx MXene nanocomposite.

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Title: Inkjet-printed wireless passive humidity sensor with ultrahigh sensitivity using ZnO/Ti₃C₂Tx MXene nanocomposite.
Authors: Li, Sun1 (AUTHOR), Hou, Jiangrong1 (AUTHOR), Xu, Yanpei1 (AUTHOR), Guo, Liang1 (AUTHOR), Zhang, Rui1 (AUTHOR), Pan, Jinghong1 (AUTHOR), Wang, Qi1 (AUTHOR) wangqi@mail.neu.edu.cn
Source: Measurement Science & Technology. Jan2026, Vol. 37 Issue 3, p1-13. 13p.
Subjects: Hygrometers, Nanocomposite materials, Hydrothermal synthesis, Surface analysis, Ink-jet printers, Wireless communications
Abstract: This study presents a highly sensitive, wireless passive humidity sensor that employs a ZnO/Ti₃C₂Tx MXene nanocomposite, synthesized using the hydrothermal method. The sensor circuit was created on pre-cut polyethylene terephthalate substrates via inkjet printing, allowing for scalable production. Material characterization techniques such as x-ray diffraction, scanning electron microscopy, x-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller verified the intercalation of ZnO nanoparticles within the MXene layers. This resulted in mesoporous structures with a surface area of 21.53 m2 g−1 and a plethora of active sites. Operating on the principles of inductor–capacitor (LC) resonance, changes in humidity-dependent permittivity cause shifts in resonant frequency that can be detected wirelessly. The sensor exhibits an ultra-high sensitivity of 138 kHz/%RH in low humidity ranges (10%–60% RH) and 2734 kHz/%RH in high humidity ranges (60%–95% RH), maintaining stable performance over a 15 d period. This remarkable dual-range sensitivity is attributed to the synergistic proton conduction through the MXene's functional groups and the oxygen vacancy-mediated dissociation of ZnO. Overall, the inkjet-printed LC sensor offers a cost-effective, robust solution for wireless humidity monitoring in sealed environments. [ABSTRACT FROM AUTHOR]
Copyright of Measurement Science & Technology is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 190722710
AccessLevel: 6
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PubTypeId: academicJournal
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  Data: Inkjet-printed wireless passive humidity sensor with ultrahigh sensitivity using ZnO/Ti₃C₂T<subscript>x</subscript> MXene nanocomposite.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Sun%22">Li, Sun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hou%2C+Jiangrong%22">Hou, Jiangrong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Yanpei%22">Xu, Yanpei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Liang%22">Guo, Liang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Rui%22">Zhang, Rui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pan%2C+Jinghong%22">Pan, Jinghong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Qi%22">Wang, Qi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wangqi@mail.neu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Measurement+Science+%26+Technology%22">Measurement Science & Technology</searchLink>. Jan2026, Vol. 37 Issue 3, p1-13. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Hygrometers%22">Hygrometers</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrothermal+synthesis%22">Hydrothermal synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+analysis%22">Surface analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Ink-jet+printers%22">Ink-jet printers</searchLink><br /><searchLink fieldCode="DE" term="%22Wireless+communications%22">Wireless communications</searchLink>
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  Data: This study presents a highly sensitive, wireless passive humidity sensor that employs a ZnO/Ti₃C₂Tx MXene nanocomposite, synthesized using the hydrothermal method. The sensor circuit was created on pre-cut polyethylene terephthalate substrates via inkjet printing, allowing for scalable production. Material characterization techniques such as x-ray diffraction, scanning electron microscopy, x-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller verified the intercalation of ZnO nanoparticles within the MXene layers. This resulted in mesoporous structures with a surface area of 21.53 m2 g−1 and a plethora of active sites. Operating on the principles of inductor–capacitor (LC) resonance, changes in humidity-dependent permittivity cause shifts in resonant frequency that can be detected wirelessly. The sensor exhibits an ultra-high sensitivity of 138 kHz/%RH in low humidity ranges (10%–60% RH) and 2734 kHz/%RH in high humidity ranges (60%–95% RH), maintaining stable performance over a 15 d period. This remarkable dual-range sensitivity is attributed to the synergistic proton conduction through the MXene's functional groups and the oxygen vacancy-mediated dissociation of ZnO. Overall, the inkjet-printed LC sensor offers a cost-effective, robust solution for wireless humidity monitoring in sealed environments. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Measurement Science & Technology is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1088/1361-6501/ae309d
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      – SubjectFull: Hydrothermal synthesis
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              Text: Jan2026
              Type: published
              Y: 2026
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