Enhancement of light scattering and photoluminescence in electrospun polymer nanofibers

Chun Ching Chang, Chun Min Huang, Yi Hao Chang, Changshu Kuo

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)A174-A184
JournalOptics Express
Volume18
Issue number102
DOIs
Publication statusPublished - 2010 Jun 21

Fingerprint

light scattering
photoluminescence
fibers
augmentation
polymers
scattering
dyes
Mie scattering
spectrophotometry
electromagnetic absorption
polymethyl methacrylate
wavelengths
reagents
selectivity
bandwidth
absorption spectra
fluorescence
propagation
thin films
excitation

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Chang, Chun Ching ; Huang, Chun Min ; Chang, Yi Hao ; Kuo, Changshu. / Enhancement of light scattering and photoluminescence in electrospun polymer nanofibers. In: Optics Express. 2010 ; Vol. 18, No. 102. pp. A174-A184.
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Enhancement of light scattering and photoluminescence in electrospun polymer nanofibers. / Chang, Chun Ching; Huang, Chun Min; Chang, Yi Hao; Kuo, Changshu.

In: Optics Express, Vol. 18, No. 102, 21.06.2010, p. A174-A184.

Research output: Contribution to journalArticle

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