Bharmoria Pankaj, Naimovičius Lukas, Abol-Fotouh Deyaa, Miroshnichenko Mila, Lekavičius Justas, De Luca Gabriele, Saeed Umair, Kazlauskas Karolis, Candau Nicolas, Baronas Paulius, Roig Anna, Moth-Poulsen Kasper
Institute of Materials Science of Barcelona, ICMAB-CSIC, Barcelona, Spain.
Institute of Photonics and Nanotechnology, Vilnius University, Vilnius, Lithuania.
Commun Mater. 2024;5(1):200. doi: 10.1038/s43246-024-00638-6. Epub 2024 Sep 28.
Biopolymers currently utilized as substitutes for synthetic polymers in photonics applications are predominantly confined to linear optical color responses. Herein we expand their applications in non-linear optics by integrating with triplet-triplet annihilation photon upconversion crystals. A photon upconverting biomaterial is prepared by cultivating Pd(II) meso-tetraphenyl tetrabenzoporphine: 9,10-diphenyl anthracene (sensitizer: annihilator) crystals on bacterial cellulose hydrogel that serves both as host and template for the crystallization of photon upconversion chromophores. Coating with gelatin improves the material's optical transparency by adjusting the refractive indices. The prepared material shows an upconversion of 633 nm red light to 443 nm blue light, indicated by quadratic to linear dependence on excitation power density (non-linearly). Notably, components of this material are physically dis-assembled to retrieve 66 ± 1% of annihilator, at the end of life. Whereas, the residual clean biomass is subjected to biodegradation, showcasing the sustainability of the developed photonics material.
目前在光子学应用中用作合成聚合物替代品的生物聚合物主要局限于线性光学颜色响应。在此，我们通过与三重态-三重态湮灭光子上转换晶体集成，扩展了它们在非线性光学中的应用。通过在细菌纤维素水凝胶上培养钯（II）中-四苯基四苯并卟啉：9,10-二苯基蒽（敏化剂：湮灭剂）晶体来制备光子上转换生物材料，该水凝胶既作为光子上转换发色团结晶的主体又作为模板。用明胶涂层通过调节折射率来提高材料的光学透明度。所制备的材料显示出633nm红光到443nm蓝光的上转换，这由对激发功率密度的二次到线性依赖性（非线性）表明。值得注意的是，在使用寿命结束时，该材料的组分可物理拆解以回收66±1%的湮灭剂。而剩余的清洁生物质则进行生物降解，展示了所开发光子学材料的可持续性。
