Real-Time Tunable Gas Sensing Platform Based on SnO2 Nanoparticles Activated by Blue Micro-Light-Emitting Diodes
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40820_2024_Article_1486.pdf
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Author(s)
Nam, Gi B.
Ryu, Jung-El
Eom, Tae H.
Kim, Seung J.
Suh, Jun M.
Lee, Seungmin
Choi, Sungkyun
Moon, Cheon W.
Park, Seon J.
Lee, Soo M.
Date Issued
August 8, 2024
Journal
Nano-Micro Letters
Publisher
Springer Nature Singapore
Citation
Nam, G.B., Ryu, JE., Eom, T.H. et al. Real-Time Tunable Gas Sensing Platform Based on SnO2 Nanoparticles Activated by Blue Micro-Light-Emitting Diodes. Nano-Micro Lett. 16, 261 (2024).
Version
Final published version
Abstract
Micro-light-emitting diodes (μLEDs) have gained significant interest as an activation source for gas sensors owing to their advantages, including room temperature operation and low power consumption. However, despite these benefits, challenges still exist such as a limited range of detectable gases and slow response. In this study, we present a blue μLED-integrated light-activated gas sensor array based on SnO2 nanoparticles (NPs) that exhibit excellent sensitivity, tunable selectivity, and rapid detection with micro-watt level power consumption. The optimal power for μLED is observed at the highest gas response, supported by finite-difference time-domain simulation. Additionally, we first report the visible light-activated selective detection of reducing gases using noble metal-decorated SnO2 NPs. The noble metals induce catalytic interaction with reducing gases, clearly distinguishing NH3, H2, and C2H5OH. Real-time gas monitoring based on a fully hardware-implemented light-activated sensing array was demonstrated, opening up new avenues for advancements in light-activated electronic nose technologies.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1007/s40820-024-01486-2
