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3 October 2022 Ultrafast colorimetric vapor sensors with disordered plasmonic nanoparticles
Jaehyuck Jang, Chunghwan Jung, Soo-Jung Kim, Sung-Hoon Hong, Junsuk Rho
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Proceedings Volume PC12197, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XX; PC121970B (2022) https://doi.org/10.1117/12.2632727
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
In this presentation, a new type of etalon for ultrafast colorimetric vapor sensor is introduced. The etalon consists of reflector, vapor-responsive hydrogel layer, and disordered plasmonic nanoparticles. This etalon presents dramatically fast gas-responsive time (~ 0.1s) because the disordered nanoparticles with certain ligand can form membrane pores smaller than the mean free path of penetrating gas. Among several candidates, thiocyanate ligand that provides optimized temporal and optical properties as effective medium is chosen. As a demonstration, the disordered nanoparticle-based etalon is applied to ultrafast humidity-responsive structural colors and an image sticker that instantaneously changes the displayed image to external humidity.
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Jaehyuck Jang, Chunghwan Jung, Soo-Jung Kim, Sung-Hoon Hong, and Junsuk Rho "Ultrafast colorimetric vapor sensors with disordered plasmonic nanoparticles", Proc. SPIE PC12197, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XX, PC121970B (3 October 2022); https://doi.org/10.1117/12.2632727
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KEYWORDS
Sensors
Fabry–Perot interferometers
Nanoparticles
Plasmonics
Humidity
Ultrafast phenomena
Metals
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