Highly phosphorescent hollow fibers inner-coated with tungstate nanocrystals

Pui Fai Ng, Gongxun Bai, Liping Si, Ka I. Lee, Jianhua Hao, John Haozhong Xin, Bin Fei

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


In order to develop luminescent microtubes from natural fibers, a facile biomimetic mineralization method was designed to introduce the CaWO4-based nanocrystals into kapok lumens. The structure, composition, and luminescence properties of resultant fibers were investigated with microscopes, x-ray diffraction, thermogravimetric analysis, and fluorescence spectrometry. The yield of tungstate crystals inside kapok was significantly promoted with a process at high temperature and pressure - the hydrothermal treatment. The tungstate crystals grown on the inner wall of kapok fibers showed the same crystal structure with those naked powders, but smaller in crystal size. The resultant fiber assemblies demonstrated reduced phosphorescence intensity in comparison to the naked tungstate powders. However, the fibers gave more stable luminescence than the naked powders in wet condition. This approach explored the possibility of decorating natural fibers with high load of nanocrystals, hinting potential applications in anti-counterfeit labels, security textiles, and even flexible and soft optical devices.
Original languageEnglish
Article number125029
JournalMaterials Research Express
Issue number12
Publication statusPublished - 1 Dec 2017


  • biomimetic mineralization
  • hydrothermal synthesis
  • kapok fiber
  • phosphorescence
  • tungstate nanocrystal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

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