Long-wave infrared transparent sulfur polymers enabled by symmetric thiol cross-linker.
In: Nature Communications, Jg. 14 (2023-05-19), Heft 1, S. 1-10
Online
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Zugriff:
Infrared (IR) transmissive polymeric materials for optical elements require a balance between their optical properties, including refractive index (n) and IR transparency, and thermal properties such as glass transition temperature (T g ). Achieving both a high refractive index (n) and IR transparency in polymer materials is a very difficult challenge. In particular, there are significant complexities and considerations to obtaining organic materials that transmit in the long-wave infrared (LWIR) region, because of high optical losses due to the IR absorption of the organic molecules. Our differentiated strategy to extend the frontiers of LWIR transparency is to reduce the IR absorption of the organic moieties. The proposed approach synthesized a sulfur copolymer via the inverse vulcanization of 1,3,5-benzenetrithiol (BTT), which has a relatively simple IR absorption because of its symmetric structure, and elemental sulfur, which is mostly IR inactive. This strategy resulted in approximately 1 mm thick windows with an ultrahigh refractive index (n av > 1.9) and high mid−wave infrared (MWIR) and LWIR transmission, without any significant decline in thermal properties. Furthermore, we demonstrated that our IR transmissive material was sufficiently competitive with widely used optical inorganic and polymeric materials. Infrared (IR) transmissive polymeric materials for optical elements require a balance between their optical and thermal properties but achieving simultaneously a high refractive index and IR transparency in the long wavelength infrared region in polymer materials is challenging. Here the authors demonstrate inverse vulcanization of 1,3,5-benzenetrithiol (BTT) to achieve a long wavelength IR transparent material without sacrificing on the thermal properties. [ABSTRACT FROM AUTHOR]
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Titel: |
Long-wave infrared transparent sulfur polymers enabled by symmetric thiol cross-linker.
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Autor/in / Beteiligte Person: | Lee, Miyeon ; Oh, Yuna ; Yu, Jaesang ; Jang, Se Gyu ; Yeo, Hyeonuk ; Park, Jong-Jin ; You, Nam-Ho |
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Zeitschrift: | Nature Communications, Jg. 14 (2023-05-19), Heft 1, S. 1-10 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 2041-1723 (print) |
DOI: | 10.1038/s41467-023-38398-5 |
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