Kirigami-inspired gas sensors for strain-insensitive operation
Wearable electronics for the Internet of Things (IoT) have spurred interest in optimizing stretchable substrates, electrodes, and sensing materials. Specifically, wearable gas sensors are valuable for real-time monitoring of hazardous chemicals. For wearable gas sensors, a stable operation under mec...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123024000586 |
| _version_ | 1797247726507786240 |
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| author | Jeonhyeong Park Hyeoncheol Lim Junwoo Yea Chaehyun Ryu Soon In Jung Runia Jana Kyung-In Jang Hohyun Keum Hoe Joon Kim |
| author_facet | Jeonhyeong Park Hyeoncheol Lim Junwoo Yea Chaehyun Ryu Soon In Jung Runia Jana Kyung-In Jang Hohyun Keum Hoe Joon Kim |
| author_sort | Jeonhyeong Park |
| collection | DOAJ |
| description | Wearable electronics for the Internet of Things (IoT) have spurred interest in optimizing stretchable substrates, electrodes, and sensing materials. Specifically, wearable gas sensors are valuable for real-time monitoring of hazardous chemicals. For wearable gas sensors, a stable operation under mechanical deformation is required. Here, we introduce strain-insensitive Kirigami-structured gas sensors decorated with titanium dioxide (TiO2) functionalized carbon nanotubes (CNTs) for NO2 sensing. The Kirigami-shaped substrate is used to ensure mechanical stability when stretched. The developed device shows only a 1.3 % change in base resistance under 80 % strain. In addition, the impact of electro-thermal properties at various strain levels is analyzed to aid the understanding of the device's performance. The CNT-TiO2 composite induced alterations in p-n heterojunctions, improving the measurement sensitivity by approximately 250 % compared to a bare CNT sensor. Additionally, the sensors exhibited a 10-fold faster desorption rate due to the enhanced photocatalytic effect of TiO2 under UV exposure. Remarkably, the Kirigami-structured gas sensors maintained stable and repetitive sensing operation even under 80 % strain, which would be enough to be used in various wearable applications. |
| first_indexed | 2024-03-08T11:42:16Z |
| format | Article |
| id | doaj.art-370c4cf7ca87467b830d700b28a1f51f |
| institution | Directory Open Access Journal |
| issn | 2590-1230 |
| language | English |
| last_indexed | 2024-04-24T20:03:16Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj.art-370c4cf7ca87467b830d700b28a1f51f2024-03-24T07:00:44ZengElsevierResults in Engineering2590-12302024-03-0121101805Kirigami-inspired gas sensors for strain-insensitive operationJeonhyeong Park0Hyeoncheol Lim1Junwoo Yea2Chaehyun Ryu3Soon In Jung4Runia Jana5Kyung-In Jang6Hohyun Keum7Hoe Joon Kim8Department of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, 42988, South KoreaDepartment of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, 42988, South KoreaDepartment of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, 42988, South KoreaDepartment of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, 42988, South KoreaDepartment of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, 42988, South KoreaDepartment of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, 42988, South KoreaDepartment of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, 42988, South KoreaDigital Health Care R&D Department, Korea Institute of Industrial Technology (KITECH), Cheonan, 31056, South Korea; Corresponding author.Department of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, 42988, South Korea; Corresponding author.Wearable electronics for the Internet of Things (IoT) have spurred interest in optimizing stretchable substrates, electrodes, and sensing materials. Specifically, wearable gas sensors are valuable for real-time monitoring of hazardous chemicals. For wearable gas sensors, a stable operation under mechanical deformation is required. Here, we introduce strain-insensitive Kirigami-structured gas sensors decorated with titanium dioxide (TiO2) functionalized carbon nanotubes (CNTs) for NO2 sensing. The Kirigami-shaped substrate is used to ensure mechanical stability when stretched. The developed device shows only a 1.3 % change in base resistance under 80 % strain. In addition, the impact of electro-thermal properties at various strain levels is analyzed to aid the understanding of the device's performance. The CNT-TiO2 composite induced alterations in p-n heterojunctions, improving the measurement sensitivity by approximately 250 % compared to a bare CNT sensor. Additionally, the sensors exhibited a 10-fold faster desorption rate due to the enhanced photocatalytic effect of TiO2 under UV exposure. Remarkably, the Kirigami-structured gas sensors maintained stable and repetitive sensing operation even under 80 % strain, which would be enough to be used in various wearable applications.http://www.sciencedirect.com/science/article/pii/S2590123024000586KirigamiGas sensorFlexibleFunctionalization |
| spellingShingle | Jeonhyeong Park Hyeoncheol Lim Junwoo Yea Chaehyun Ryu Soon In Jung Runia Jana Kyung-In Jang Hohyun Keum Hoe Joon Kim Kirigami-inspired gas sensors for strain-insensitive operation Results in Engineering Kirigami Gas sensor Flexible Functionalization |
| title | Kirigami-inspired gas sensors for strain-insensitive operation |
| title_full | Kirigami-inspired gas sensors for strain-insensitive operation |
| title_fullStr | Kirigami-inspired gas sensors for strain-insensitive operation |
| title_full_unstemmed | Kirigami-inspired gas sensors for strain-insensitive operation |
| title_short | Kirigami-inspired gas sensors for strain-insensitive operation |
| title_sort | kirigami inspired gas sensors for strain insensitive operation |
| topic | Kirigami Gas sensor Flexible Functionalization |
| url | http://www.sciencedirect.com/science/article/pii/S2590123024000586 |
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