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Electrospun dye-doped polymer nanofibers emitting in the near infrared
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View: Figures


Image of FIG. 1.
FIG. 1.

Dye-PMMA composite nanofibers. [(a)–(c)] SEM images of mats of nanofibers as collected after electrospinning process with an applied voltage of (a) , (b) , and (c) . Pumping and solution . (d) Nanofibers average diameter vs applied bias voltage. Inset: single fiber with diameter of about .

Image of FIG. 2.
FIG. 2.

Absorption (left vertical scale, dashed line) and PL (right vertical scale, continuous line) spectra of the nanofibers. The absorption (empty circles) and PL (empty squares) spectra of a reference spin-cast film are also displayed. Inset: fluorescence microscopy picture of the composite nanofibers.

Image of FIG. 3.
FIG. 3.

(a) Temporal behavior of the nanofiber PL spectra acquired during UV excitation in air. UV exposure times are, from top to bottom, 3, 30, 45, 150, 300, 550, and . The dotted arrow indicates the observed blueshift of the peak wavelength. (b) Time evolution of the PL intensity of a population of nanofibers with average diameters (circles) and (squares). The solid superimposed lines are fits to the data with Eq. (1). Inset: PL peak wavelength vs time for the two populations centered at (bottom curve) and (top curve).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electrospun dye-doped polymer nanofibers emitting in the near infrared