Journal
ADVANCED OPTICAL MATERIALS
Volume 8, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201901932
Keywords
Fabry-Perot etalon; interferometric colors; metal-insulator-metal; structural colors; tunable color filter; tunable structural colors
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Funding
- Samsung Research Funding & Incubation Center of Samsung Electronics [SRFC-IT1901-05]
- National Research Foundation (NRF) - Ministry of Science and ICT (MSIT), Korea [NRF-2015R1A5A1037668]
- Hyundai Motor Chung Mong-Koo Foundation
- NRF fellowship by Ministry of Education, Korea [NRF-2019R1A6A3A13091132]
- Ministry of Education, Korea
- National Research Foundation of Korea [2015R1A5A1037668] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A tunable Fabry-Perot resonator is realized using metal-insulator-metal structure, in which the insulator is chitosan hydrogel. The chitosan swells in response to changes in relative humidity; this change affects transmissive structural color of the multilayer structure. This tunable resonator is utilized for a humidity sensor combined with a photovoltaic cell. The change in current through the photovoltaic cell provides rapid precise measurement of relative humidity, and the change in color of the multilayer provides an approximate, remotely-readable estimate. The response requires no power, so the device has numerous sensing applications.
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