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Flexible Scintillation Silica Fiber with Engineered Nanocrystals for Remote Real-Time X-ray Detection.

Ming JiaJianxiang WenXiangping PanLiang ZhangJie YuanYi HuangXiaobei ZhangLinfeng HeFufei PangTing-Yun Wang
Published in: ACS applied materials & interfaces (2021)
Scintillation fibers based on rare-earth ion-doped crystal materials have attracted significant attention for applications in a wide range of areas from security to healthcare. However, the scintillation performance of crystal fibers is severely limited owing to the complex preparation process. Here, we report a modified preparation process of the transparent Ce/Tb co-doped yttrium pyrosilicate (YPS) nanocrystal silica fiber for the first time, which was fabricated by the CO 2 laser-heated method assisted with optimal thermal annealing. An YPS nanocrystal phase with an average size of approximately 38 nm is obtained by controlling the diffusion concentration of SiO 2 in the fiber core region. Both Ce 3+ and Tb 3+ ions were successfully embedded into YPS nanocrystals, which enhanced the energy transfer with an efficiency of 59.87% between the dopants as well as brighter green light emission. Furthermore, the X-ray-excited remote radioluminescence response of the obtained YPS nanocrystal fiber with a length of 20 m was approximately 1 order of magnitude larger than that of the precursor fiber, while the dose rate response exhibited excellent linearity. It is believed that the novel transparent YPS nanocrystal-doped silica optical fibers, combined with their excellent fluorescent properties, could be promising candidates for scintillators, fiber lasers, and phosphors.
Keyphrases
  • energy transfer
  • quantum dots
  • healthcare
  • high resolution
  • mycobacterium tuberculosis
  • sensitive detection
  • magnetic resonance
  • high speed
  • solid state
  • living cells
  • tandem mass spectrometry