Luminescent Gold Nanocluster?Methylcellulose Composite Optical Fibers with Low Attenuation Coefficient and High Photostability

Because of their lightweight structure, flexibility, and immunity to electromagnetic interference, polymer optical fibers (POFs) are used in numerous short-distance applications. Notably, the incorporation luminescent nanomaterials POFs offers amplification sensing for advanced nanophotonics. However, conventional suffer from nonsustainable components processes. Furthermore, traditionally undergo photobleaching, oxidation, they can be cytotoxic. Therefore, biopolymer-based containing nontoxic needed, with efficient environmentally acceptable extrusion methods. Here, such an approach wet-spun aqueous methylcellulose (MC) dispersions under ambient conditions is demonstrated. Further, addition either gold nanoclusters, rod-like cellulose nanocrystals or nanocluster-cellulose nanocrystal hybrids into MC matrix furnishes strong ductile composite fibers. Using cutback attenuation measurement, it shown that resulting act as a propagation loss low 1.47 dB cm?1. The performance on par even better than some previously reported biopolymeric combination excellent mechanical properties (Young's modulus maximum strain values up 8.4 GPa 52%, respectively), coefficient, high photostability makes MC-based candidates multifunctional sensors.