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Development of a Photonic Switch via Electro-Capillarity-Induced Water Penetration Across a 10-nm Gap
Cited 1 time in
Web of Science
Cited 2 time in Scopus
- Authors
- Issue Date
- 2022-04
- Publisher
- Wiley - V C H Verlag GmbbH & Co.
- Citation
- Small, Vol.18 No.14, p. 2107060
- Abstract
- With narrow and dense nanoarchitectures increasingly adopted to improve optical functionality, achieving the complete wetting of photonic devices is required when aiming at underwater molecule detection over the water-repellent optical materials. Despite continuous advances in photonic applications, real-time monitoring of nanoscale wetting transitions across nanostructures with 10-nm gaps, the distance at which photonic performance is maximized, remains a chronic hurdle when attempting to quantify the water influx and molecules therein. For this reason, the present study develops a photonic switch that transforms the wetting transition into perceivable color changes using a liquid-permeable Fabry-Perot resonator. Electro-capillary-induced Cassie-to-Wenzel transitions produce an optical memory effect in the photonic switch, as confirmed by surface-energy analysis, simulations, and an experimental demonstration. The results show that controlling the wetting behavior using the proposed photonic switch is a promising strategy for the integration of aqueous media with photonic hotspots in plasmonic nanostructures such as biochemical sensors.
- ISSN
- 1613-6810
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