Article Dans Une Revue Nature Communications Année : 2025

Self-regulating and self-oscillating metal-organic framework hybrid plasmonic metasurfaces

Résumé

Metal-organic frameworks (MOFs) offer remarkable chemical versatility, structural diversity, and, in some cases, stimuli-responsiveness. In the latter case, they typically rely on external inputs to trigger these changes. In contrast, living systems possess the ability to internally self-regulate and autonomously adapt their properties without external intervention, utilizing internal feedback mechanisms. To fill this gap, we develop a MOF-based metasurface that exhibits autonomous optical self-regulation, dynamically adjusting light absorption in response to varying incident light intensity. This device integrates colloidal MOFs with a plasmonic metasurface to create a thermo-optical negative feedback mechanism based on vapor sorption in and out of the colloidal MOF device. The self-regulation process is dynamic, leading each MOF/antenna unit to exhibit self-oscillatory behavior in the presence of a constant external energy input, analogous to a light-fueled nanoscale steam engine. This proof-of-concept highlights the potential of harnessing MOFs and sorption processes for designing metasurfaces for adaptable optical applications. It also represents a first step toward the design of materials integrating feedback mechanisms and internal clocks paving the way for a new generation of porous materials with life-like autonomy.

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hal-05405318 , version 1 (08-12-2025)

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Hajar Amyar, Davide Raffaele Ceratti, Henri Benisty, Andrea Cattoni, Mondher Besbes, et al.. Self-regulating and self-oscillating metal-organic framework hybrid plasmonic metasurfaces. Nature Communications, 2025, 16, pp.10392. ⟨10.1038/s41467-025-65338-2⟩. ⟨hal-05405318⟩
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