Micro-optical elements from optical-quality ZIF-62 hybrid glasses by hot imprinting

Oksana Smirnova, Roman Sajzew, Sarah Jasmin Finkelmeyer, Teymur Asadov, Sayan Chattopadhyay, Torsten Wieduwilt, Aaron Reupert, Martin Presselt, Alexander Knebel and Lothar Wondraczek ()
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Oksana Smirnova: Otto Schott Institute of Materials Research
Roman Sajzew: Otto Schott Institute of Materials Research
Sarah Jasmin Finkelmeyer: Leibniz Institute of Photonic Technology (IPHT)
Teymur Asadov: Otto Schott Institute of Materials Research
Sayan Chattopadhyay: Otto Schott Institute of Materials Research
Torsten Wieduwilt: Leibniz Institute of Photonic Technology (IPHT)
Aaron Reupert: Otto Schott Institute of Materials Research
Martin Presselt: Leibniz Institute of Photonic Technology (IPHT)
Alexander Knebel: Otto Schott Institute of Materials Research
Lothar Wondraczek: Otto Schott Institute of Materials Research

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Hybrid glasses derived from meltable metal-organic frameworks (MOFs) promise to combine the intriguing properties of MOFs with the universal processing ability of glasses. However, the shaping of hybrid glasses in their liquid state – in analogy to conventional glass processing – has been elusive thus far. Here, we present optical-quality glasses derived from the zeolitic imidazole framework ZIF-62 in the form of cm-scale objects. These allow for in-depth studies of optical transparency and refraction across the ultraviolet to near-infrared spectral range. Fundamental viscosity data are reported using a ball penetration technique, and subsequently employed to demonstrate the fabrication of micro-optical devices by thermal imprinting. Using 3D-printed fused silica templates, we show that concave as well as convex lens structures can be obtained at high precision by remelting the glass without trading-off on material quality. This enables multifunctional micro-optical devices combining the gas uptake and permeation ability of MOFs with the optical functionality of glass. As an example, we demonstrate the reversible change of optical refraction upon the incorporation of volatile guest molecules.

Date: 2024
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DOI: 10.1038/s41467-024-49428-1

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