| Enhancement of light scattering and photoluminescence in electrospun polymer nanofibers. | |
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MedLine Citation:
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PMID: 20588586 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Poly(methyl methacrylate) nanofibers with desired fiber diameters that ranged from 336 to 896 nm were electrospun as light scattering and propagation materials. The light scattering behavior of these samples as a function of the fiber diameter and fiber deposition thickness was examined by UV-vis spectrophotometry, which revealed the scattering bands in the absorption spectra. The scattering bands of these nanofibers were linearly proportional to the fiber diameter, which shows good agreement with a scattering model based on the Mie theory. The light scattering and prolonged light path lengths in the nanofiber scaffolds were monitored and quantified by the photoluminescence of a fluorescent dye, Coumarin 6, which was preloaded into the polymer nanofibers. The photoluminescence after proper normalization showed a second-order dependence on the dye loading per unit area, which is significantly different from the spin-coated thin-film samples following a first-order relationship. Nonlinear photoluminescence enhancements indicated prolonged light path lengths and multiple light absorptions within the fiber scaffolds as a result of light scattering. Even with relatively broad scattering band widths, the light scattering and photoluminescence of the electrospun nanofibers exhibited considerable wavelength selectivity, especially as the scattering bands overlapped with the excitation wavelengths of the fluorescence reagent. |
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Authors:
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Chun-Ching Chang; Chun-Min Huang; Yi-Hao Chang; Changshu Kuo |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Optics express Volume: 18 Suppl 2 ISSN: 1094-4087 ISO Abbreviation: Opt Express Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-06-30 Completed Date: 2010-10-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137103 Medline TA: Opt Express Country: United States |
Other Details:
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Languages: eng Pagination: A174-84 Citation Subset: - |
Affiliation:
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Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701-01, Taiwan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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