Humidity- And Temperature-Tunable Metal-Hydrogel-Metal Reflective Filters

Semyon Chervinskii, Ibrahim Issah, Markus Lahikainen, Alireza R. Rashed, Kim Kuntze, Arri Priimagi, Humeyra Caglayan

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A tunable reflectance filter based on a metal-hydrogel-metal structure responsive to humidity and temperature is reported. The filter employs a poly(N-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.

Original languageEnglish
Pages (from-to)50564–50572
Number of pages9
JournalACS Applied Materials and Interfaces
Issue number42
Publication statusPublished - 2021
Publication typeA1 Journal article-refereed


  • active plasmonics
  • hydrogel
  • metal-insulator-metal
  • PNIPAm
  • stimuli-responsive material
  • tunable color filter

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

  • Materials Science(all)


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