| Autor: |
Ren, Fangying, Li, Yue, Pun, Edwin Yue Bun, Lin, Hai |
| Zdroj: |
The Journal of Physical Chemistry - Part C; 20210101, Issue: Preprints |
| Abstrakt: |
Ba(Y1–x–yErxYby)F5/polyacrylonitrile (BYF-EY/PAN) composite fibers have been prepared by adopting the electrospinning technology, and fusiform-polycrystalline-implanted fibers can be fused with a thermal response function and excellent flexibility. Upconversion emission displays quadratic and cubical dependence of the photoluminescence intensity on the pumping power, confirming two-photon- and three-photon-induced processes, respectively. Among them, the intense green emission ascribed to 2H11/2/4S3/2→ 4I15/2transitions is appointed as the main indicator of noncontact temperature sensing, and the faintish blue-violet emission originated from 4G11/2/2H9/2→ 4I15/2transitions can be served as an auxiliary monitoring channel to calibrate deviation, thereby improving operational accuracy. At a relatively moderate working temperature (363 K), the absolute sensitivity and relative sensitivity of composite fibers reach as high as 0.455 and 0.832% K–1for main sensing and 0.391 and 2.176% K–1for auxiliary sensing, respectively. The developed BYF-EY/PAN fiber with outstanding dual-feedbacked temperature sensing is promising to act as flexible sensing elements in fabrics and biomedical devices. |
| Databáze: |
Supplemental Index |
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