biostudies-literatureChervinskii SAcademy of FinlandEuropean Research CouncilEmil Aaltosen S????ti??50564-50572https://www.ebi.ac.uk/biostudies/studies/S-EPMC8554756biostudies-literatureUnknown13(42)A tunable reflectance filter based on a metal-hydrogel-metal structure responsive to humidity and temperature is reported. The filter employs a poly(<i>N</i>-isopropylacrylamide)-acrylamidobenzophenone (PNIPAm-BP) hydrogel as an insulator layer in the metal-insulator-metal (MIM) assembly. The optical resonance of the structure is tunable by water immersion across the visible and near-infrared range. Swelling/deswelling and the volume phase transition of the hydrogel allow continuous reversible humidity- and/or temperature-induced tuning of the optical resonance. This work paves the way toward low-cost large-area fabrication of actively tunable reversible photonic devices.ACS applied materials & interfacesHumidity- and Temperature-Tunable Metal-Hydrogel-Metal Reflective Filters.PMC8554756321065802986679646324353Rashed ARLahikainen MKuntze KPriimagi ACaglayan HChervinskii SIssah IfalseHumidity- and Temperature-Tunable Metal-Hydrogel-Metal Reflective Filters.A tunable reflectance filter based on a metal-hydrogel-metal structure responsive to humidity and temperature is reported. The filter employs a poly(<i>N</i>-isopropylacrylamide)-acrylamidobenzophenone (PNIPAm-BP) hydrogel as an insulator layer in the metal-insulator-metal (MIM) assembly. The optical resonance of the structure is tunable by water immersion across the visible and near-infrared range. Swelling/deswelling and the volume phase transition of the hydrogel allow continuous reversible humidity- and/or temperature-induced tuning of the optical resonance. This work paves the way toward low-cost large-area fabrication of actively tunable reversible photonic devices.2021-01-01T00:00:00Z2021 Oct2025-04-04T14:08:23.211Z2025-04-04T14:08:23.211ZS-EPMC85547563464338510.1021/acsami.1c15616