中国物理B ›› 2012, Vol. 21 ›› Issue (9): 97805-097805.doi: 10.1088/1674-1056/21/9/097805

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Electrospun fluorescein/polymer composite nanofibers and their photoluminescent properties

张志华a b, 龙云泽a d e, 尹红星c, 孙彬a, 郑杰a, 张红娣a, 纪新明b, 顾长志c   

  1. a College of Physics, Qingdao University, Qingdao 266071, China;
    b State Key Laboratory of ASIC & System, Department of Microelectronics, Fudan University, Shanghai 200433, China;
    c Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    d State Key Laboratory Cultivation Base of New Fiber Materials & Modern Textile, Qingdao University, Qingdao 266071, China;
    e Key Laboratory of Photonics Materials and Technology in Universities of Shandong (Qingdao University), Qingdao 266071, China
  • 收稿日期:2012-02-04 修回日期:2012-03-04 出版日期:2012-08-01 发布日期:2012-08-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11074138, 11004114, 60906054, and 50825206), the Shandong Provincial Natural Science Foundation for Distinguished Young Scholars, China (Grant No. JQ201103), the Taishan Scholars Program of Shandong Province, China, the National Basic Research Program of China (Grant No. 2012CB722705), and the National High Technology Research and Development Program of China (Grant No. 2011AA100706).

Electrospun fluorescein/polymer composite nanofibers and their photoluminescent properties

Zhang Zhi-Hua (张志华)a b, Long Yun-Ze (龙云泽)a d e, Yin Hong-Xin (尹红星)c, Sun Bin (孙彬)a, Zheng Jie (郑杰)a, Zhang Hong-Di (张红娣)a, Ji Xin-Ming (纪新明)b, Gu Chang-Zhi (顾长志)c   

  1. a College of Physics, Qingdao University, Qingdao 266071, China;
    b State Key Laboratory of ASIC & System, Department of Microelectronics, Fudan University, Shanghai 200433, China;
    c Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    d State Key Laboratory Cultivation Base of New Fiber Materials & Modern Textile, Qingdao University, Qingdao 266071, China;
    e Key Laboratory of Photonics Materials and Technology in Universities of Shandong (Qingdao University), Qingdao 266071, China
  • Received:2012-02-04 Revised:2012-03-04 Online:2012-08-01 Published:2012-08-01
  • Contact: Long Yun-Ze E-mail:yunze.long@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11074138, 11004114, 60906054, and 50825206), the Shandong Provincial Natural Science Foundation for Distinguished Young Scholars, China (Grant No. JQ201103), the Taishan Scholars Program of Shandong Province, China, the National Basic Research Program of China (Grant No. 2012CB722705), and the National High Technology Research and Development Program of China (Grant No. 2011AA100706).

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摘要： Fluorescein/polyvinyl pyrrolidone (PVP) composite nanofibers with different fluorescein loadings (with weight concentration of 0-5.0%) are fabricated via electrospinning. Morphologies, structures and photoluminescent (PL) properties of these straight, helical or wavelike fibers are characterized by scanning electron microscope (SEM), fluorescence microscope and spectrophotometer. It is found that the maximum emission of the as-spun fluorescein/PVP fibers occurs at 510 nm. The PL intensity of the composite fiber increases with the increase of fluorescein concentration, then fluorescence quenching appears when the concentration reaches 1.67%. The mechanism of fluorescence quenching of fluorescein is discussed. In addition, the composite fibers exhibit much stronger PL intensity than fluorescein/PVP bulk film owing to larger specific surface area, which makes them promising materials for biomedical applications such as probes and sensors.

关键词: nanofibers, electrospinning, fluorescence, self-quenching

Abstract: Fluorescein/polyvinyl pyrrolidone (PVP) composite nanofibers with different fluorescein loadings (with weight concentration of 0-5.0%) are fabricated via electrospinning. Morphologies, structures and photoluminescent (PL) properties of these straight, helical or wavelike fibers are characterized by scanning electron microscope (SEM), fluorescence microscope and spectrophotometer. It is found that the maximum emission of the as-spun fluorescein/PVP fibers occurs at 510 nm. The PL intensity of the composite fiber increases with the increase of fluorescein concentration, then fluorescence quenching appears when the concentration reaches 1.67%. The mechanism of fluorescence quenching of fluorescein is discussed. In addition, the composite fibers exhibit much stronger PL intensity than fluorescein/PVP bulk film owing to larger specific surface area, which makes them promising materials for biomedical applications such as probes and sensors.

Key words: nanofibers, electrospinning, fluorescence, self-quenching

中图分类号:  (Nanowires)

  • 78.67.Uh
81.07.Gf (Nanowires) 81.16.-c (Methods of micro- and nanofabrication and processing)