유의상 Chae, Kyomin 김태현 이종수 Seo, Jungmok 김인수 Chung, Aram J. Lee, Sin­Doo Ryu, Yong­Sang 2024-01-12T03:31:58Z 2024-01-12T03:31:58Z 2022-02-23 2022-04 1613-6810 https://pubs.kist.re.kr/handle/201004/76769 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. English WILEY-V C H VERLAG GMBH Development of a Photonic Switch via Electro-Capillarity-Induced Water Penetration Across a 10-nm Gap Article 10.1002/smll.202107060 1 SMALL, v.18, no.14 SMALL 18 14 N scie scopus 000758091100001 2-s2.0-85124891318 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article SUPERHYDROPHOBIC BREAKDOWN REFRACTIVE-INDEX SURFACE COLOR WETTABILITY RESISTANCE PLATFORM LIQUIDS NANO Fabry-Perot resonators nanogaps refractive index sensors tunable structural color wetting transition