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Electrospun fluorescein/polymer composite nanofibers and their photoluminescent properties

ISSN号：1674-1056
期刊名称：《中国物理B：英文版》
时间：0
分类：TQ342.83[化学工程—化纤工业] O631[理学—高分子化学;理学—化学]
作者机构：[1]College of Physics, Qingdao University, Qingdao 266071, China, [2]State Key Laboratory of ASIC & System, Department of Microelectronics, Fudan University, Shanghai 200433, China, [3]Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, [4]State Key Laboratory Cultivation Base of New Fiber Materials & Modern Textile, Qingdao University, Qingdao 266071, China, [5]Key Laboratory of Photonics Materials and Technology in Universities of Shandong (Qingdao University), Qingdao 266071, China
相关基金：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）.

作者：张志华[1,2], 龙云泽[1,4,5], 尹红星[3], 孙彬[1], 郑杰[1], 张红娣[1], 纪新明[2], 顾长志[3]

关键词：复合纳米纤维, 光致发光性质, 静电纺丝, 荧光素, 聚合物, 聚乙烯基吡咯烷酮, 扫描电子显微镜, 生物医学应用, nanoflbers, electrospinning, fluorescence, self-quenching

中文摘要：

Fluorescein/polyvinyl pyrrolidone (PVP) composite nanofibers with different fluorescein loadings (with a 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 microscopy (SEM), fluorescence microscopy and a 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 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 a 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.

英文摘要：

Fluorescein/polyvinyl pyrrolidone （PVP） composite nanofibers with different fluorescein loadings （with a weight concentration of 0-5.0%） are fabricated via electrospinning. Morphologies, structures and photoluminescent （PL） prop- erties of these straight, helical or wavelike fibers are characterized by scanning electron microscopy （SEM）, fluorescence microscopy and a 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 fluorescein concentration, then fluorescence quenching appears when the concentration reaches 1.67%. The mechanism of fluorescence quenching of fiuorescein is discussed. In addition, the composite fibers exhibit a 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.

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