Abstract
Humidity sensors are used in various applications to provide suitable environmental conditions. High-performance humidity sensors require highly sensitive active sites to detect water molecules. In this study, a nanopillar-array-based electrode (NAE) was developed, which has a large specific surface area and is applicable to various humidity-sensing materials. The NAE, which was fabricated via photo-lithography and soft lithography, exhibited superior electrochemical capacitance and diffusion behavior compared to flat electrodes. The NAE-based humidity sensor exhibited a high sensitivity and linearity, low hysteresis error, and long-term stability for a duration of 25 days. Moreover, the humidity sensor maintained a consistent impedance signal in a mechanically bent state. Furthermore, the real-time monitoring performance of the humidity sensor was demonstrated by measuring humidity changes during plant transpiration.
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The data used in this study are available upon request from the corresponding author.
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Acknowledgements
S.T.J., S.J.K., and J. K. contributed equally to this work. This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science and ICT (No. 2021R1A2C1009926), the Nanomedical Devices Devel-opment Project of NNFC in 2023, Nano Open Innovation Lab Cooperation Project of NNFC in 2023, and the Technology Innovation Program (20015577) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).
Funding
This work was funded by National research foundation of Korea, 2021R1A2C1009926, Bong Gill Choi, Nanomedical Devices Development Project of NNFC, 2023, Kyoung G. Lee, Ministry of Trade, Industry and Energy, 20015577, Bong Gill Choi, and Nano Open Innovation Lab Cooperation Project of NNFC, 2023, Bong Gill Choi.
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Jang, S.T., Kim, S.J., Kim, J. et al. Fabrication of Highly Ordered Nanopillar Array Electrode for High-Performance Humidity Sensors. BioChip J (2024). https://doi.org/10.1007/s13206-024-00150-6
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DOI: https://doi.org/10.1007/s13206-024-00150-6