期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 2, 页码 3315-3323出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c22227
关键词
cellulose; optical fibers; sensors; respiratory sensors; green photonics; biosensors
资金
- Academy of Finland Flagship Programme (Competence Center for Materials Bioeconomy, FinnCERES) [318890, 318891]
- Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN) [320168]
This study examines the potential of carboxymethyl cellulose in producing optical fibers and demonstrates its applications in touch sensing, respiratory rate monitoring, and high-speed signal transmission. The results highlight the potential of carboxymethyl cellulose-based optical fibers for advanced sensor applications.
Optical fibers are a key component in modern photonics, where conventionally used polymer materials are derived from fossil-based resources, causing heavy greenhouse emissions and raising sustainability concerns. As a potential alternative, fibers derived from cellulose-based materials offer renewability, biocompatibility, and biodegradability. In the present work, we studied the potential of carboxymethyl cellulose (CMC) to prepare optical fibers with a core-only architecture. Wet-spun CMC hydrogel filaments were cross-linked using aluminum ions to fabricate optical fibers. The transmission spectra of fibers suggest that the light transmission window for cladding-free CMC fibers was in the range of 550-1350 nm, wherein the attenuation coefficient for CMC fibers was measured to be 1.6 dB.cm(-1) at 637 nm. CMC optical fibers were successfully applied in touch sensing and respiratory rate monitoring. Finally, as a proof-of-concept, we demonstrate high-speed (150 Mbit/s) short-distance signal transmission using CMC fibers (at 1310 nm) in both air and water media. Our results establish the potential of carboxymethyl cellulose-based biocompatible optical fibers for highly demanding advanced sensor applications, such as in the biomedical domain.
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