Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors

Madhawa Basnayaka; Riku Jantti; Kalle Ruttik; Juho Kerminen; Katherine Gallegos-Rosas; Caterina Soldano

doi:10.23919/GeMiC64734.2025.10979161

Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors

Madhawa Basnayaka^*, Riku Jantti, Kalle Ruttik, Juho Kerminen, Katherine Gallegos-Rosas, Caterina Soldano

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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Abstract

This study presents a passive and chipless humidity sensor to monitor relative humidity (RH) continuously. The sensor is constructed on kapton substrates, a C-shaped resonator integrated with meander line structure that operates at 5.925 GHz and is printed with silver nanoparictles (Ag NPs) conducting ink. Eco-friendly, carboxymethyl cellulose (CMC) fabricated in between conducting AgNP lines to monitor RH in slowly changing environment. Both layers are deposited using ultrasonic aerosol jet printer technology. The CMC layer served as an active sensing element, enhancing the microwave resonator's sensitivity and overall performance in detecting humidity. The sensor demonstrates high sensitivity, reaching up to 0.77MHz/%RH across a humidity range of 47.5% to 90%.

Original language	English
Title of host publication	2025 16th German Microwave Conference, GeMiC 2025
Publisher	Institut für Microwellen- und Antennentechnik e.V.
Pages	577-580
Number of pages	4
ISBN (Electronic)	978-3-9820397-4-9
DOIs	https://doi.org/10.23919/GeMiC64734.2025.10979161
Publication status	Published - 2025
MoE publication type	A4 Conference publication
Event	German Microwave Conference - Dresden, Germany Duration: 17 Mar 2025 → 19 Mar 2025 Conference number: 16

Publication series

Name	2025 16th German Microwave Conference, GeMiC 2025

Conference

Conference	German Microwave Conference
Abbreviated title	GeMiC
Country/Territory	Germany
City	Dresden
Period	17/03/2025 → 19/03/2025

Keywords

Cellulose
coaxial resonators
humidity sensor

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10.23919/GeMiC64734.2025.10979161

Investigating_Carboxymethyl_Cellulose_in_Aerosol_Jet_Printed_Microwave_Humidity_SensorsAccepted author manuscript, 3.28 MB

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Basnayaka, M., Jantti, R., Ruttik, K., Kerminen, J., Gallegos-Rosas, K., & Soldano, C. (2025). Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors. In 2025 16th German Microwave Conference, GeMiC 2025 (pp. 577-580). (2025 16th German Microwave Conference, GeMiC 2025). Institut für Microwellen- und Antennentechnik e.V.. https://doi.org/10.23919/GeMiC64734.2025.10979161

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title = "Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors",

abstract = "This study presents a passive and chipless humidity sensor to monitor relative humidity (RH) continuously. The sensor is constructed on kapton substrates, a C-shaped resonator integrated with meander line structure that operates at 5.925 GHz and is printed with silver nanoparictles (Ag NPs) conducting ink. Eco-friendly, carboxymethyl cellulose (CMC) fabricated in between conducting AgNP lines to monitor RH in slowly changing environment. Both layers are deposited using ultrasonic aerosol jet printer technology. The CMC layer served as an active sensing element, enhancing the microwave resonator's sensitivity and overall performance in detecting humidity. The sensor demonstrates high sensitivity, reaching up to 0.77MHz/%RH across a humidity range of 47.5% to 90%.",

keywords = "Cellulose, coaxial resonators, humidity sensor",

author = "Madhawa Basnayaka and Riku Jantti and Kalle Ruttik and Juho Kerminen and Katherine Gallegos-Rosas and Caterina Soldano",

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doi = "10.23919/GeMiC64734.2025.10979161",

language = "English",

series = "2025 16th German Microwave Conference, GeMiC 2025",

publisher = "Institut f{\"u}r Microwellen- und Antennentechnik e.V.",

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Basnayaka, M , Jantti, R , Ruttik, K, Kerminen, J, Gallegos-Rosas, K & Soldano, C 2025, Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors. in 2025 16th German Microwave Conference, GeMiC 2025. 2025 16th German Microwave Conference, GeMiC 2025, Institut für Microwellen- und Antennentechnik e.V., pp. 577-580, German Microwave Conference, Dresden, Germany, 17/03/2025. https://doi.org/10.23919/GeMiC64734.2025.10979161

Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors. / Basnayaka, Madhawa ; Jantti, Riku ; Ruttik, Kalle et al.
2025 16th German Microwave Conference, GeMiC 2025. Institut für Microwellen- und Antennentechnik e.V., 2025. p. 577-580 (2025 16th German Microwave Conference, GeMiC 2025).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors

AU - Basnayaka, Madhawa

AU - Jantti, Riku

AU - Ruttik, Kalle

AU - Kerminen, Juho

AU - Gallegos-Rosas, Katherine

AU - Soldano, Caterina

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N2 - This study presents a passive and chipless humidity sensor to monitor relative humidity (RH) continuously. The sensor is constructed on kapton substrates, a C-shaped resonator integrated with meander line structure that operates at 5.925 GHz and is printed with silver nanoparictles (Ag NPs) conducting ink. Eco-friendly, carboxymethyl cellulose (CMC) fabricated in between conducting AgNP lines to monitor RH in slowly changing environment. Both layers are deposited using ultrasonic aerosol jet printer technology. The CMC layer served as an active sensing element, enhancing the microwave resonator's sensitivity and overall performance in detecting humidity. The sensor demonstrates high sensitivity, reaching up to 0.77MHz/%RH across a humidity range of 47.5% to 90%.

AB - This study presents a passive and chipless humidity sensor to monitor relative humidity (RH) continuously. The sensor is constructed on kapton substrates, a C-shaped resonator integrated with meander line structure that operates at 5.925 GHz and is printed with silver nanoparictles (Ag NPs) conducting ink. Eco-friendly, carboxymethyl cellulose (CMC) fabricated in between conducting AgNP lines to monitor RH in slowly changing environment. Both layers are deposited using ultrasonic aerosol jet printer technology. The CMC layer served as an active sensing element, enhancing the microwave resonator's sensitivity and overall performance in detecting humidity. The sensor demonstrates high sensitivity, reaching up to 0.77MHz/%RH across a humidity range of 47.5% to 90%.

KW - Cellulose

KW - coaxial resonators

KW - humidity sensor

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U2 - 10.23919/GeMiC64734.2025.10979161

DO - 10.23919/GeMiC64734.2025.10979161

M3 - Conference article in proceedings

AN - SCOPUS:105007134724

T3 - 2025 16th German Microwave Conference, GeMiC 2025

SP - 577

EP - 580

BT - 2025 16th German Microwave Conference, GeMiC 2025

PB - Institut für Microwellen- und Antennentechnik e.V.

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Y2 - 17 March 2025 through 19 March 2025

ER -

Basnayaka M , Jantti R , Ruttik K, Kerminen J, Gallegos-Rosas K , Soldano C. Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors. In 2025 16th German Microwave Conference, GeMiC 2025. Institut für Microwellen- und Antennentechnik e.V. 2025. p. 577-580. (2025 16th German Microwave Conference, GeMiC 2025). doi: 10.23919/GeMiC64734.2025.10979161

Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors

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WALLPAPER - T40702 Jäntti: Intelligent wallpaper - Enabling sustainable wireless systems with organic electronics

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Investigating Carboxymethyl Cellulose in Aerosol Jet Printed Microwave Humidity Sensors

Abstract

Publication series

Conference

Keywords

Access to Document

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Fingerprint

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WALLPAPER - T40702 Jäntti: Intelligent wallpaper - Enabling sustainable wireless systems with organic electronics

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