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Reports Outline Nanofibers Findings from University of Salento (Conformational Evolution of Elongated Polymer Solutions Tailors the Polarization of...

August 29, 2014



Reports Outline Nanofibers Findings from University of Salento (Conformational Evolution of Elongated Polymer Solutions Tailors the Polarization of Light-Emission from Organic Nanofibers)

By a News Reporter-Staff News Editor at Science Letter -- Researchers detail new data in Nanofibers. According to news reporting originating from Lecce, Italy, by NewsRx correspondents, research stated, "Polymer fibers are currently exploited in tremendously important technologies. Their innovative properties are mainly determined by the behavior of the polymer macromolecules under the elongation induced by external mechanical or electrostatic forces, characterizing the fiber drawing process."

Our news editors obtained a quote from the research from the University of Salento, "Although enhanced physical properties were observed in polymer fibers produced under strong stretching conditions, studies of the process-induced nanoscale organization of the polymer molecules are not available, and most of fiber properties are still obtained on an empirical basis. Here we reveal the orientational properties of semiflexible polymers in electrospun nanofibers, which allow the polarization properties of active fibers to be finely controlled. Modeling and simulations of the conformational evolution of the polymer chains during electrostatic elongation of semidilute solutions demonstrate that the molecules stretch almost fully within less than 1 mm from jet start, increasing polymer axial orientation at the jet center. The nanoscale mapping of the local dichroism of individual fibers by polarized near-field optical microscopy unveils for the first time the presence of an internal spatial variation of the molecular order, namely the presence of a core with axially aligned molecules and a sheath with almost radially oriented molecules."

According to the news editors, the research concluded: "These results allow important and specific fiber properties to be manipulated and tailored, as here demonstrated for the polarization of emitted light."

For more information on this research see: Conformational Evolution of Elongated Polymer Solutions Tailors the Polarization of Light-Emission from Organic Nanofibers. Macromolecules, 2014;47(14):4704-4710. Macromolecules can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Macromolecules - www.pubs.acs.org/journal/mamobx)

The news editors report that additional information may be obtained by contacting A. Camposeo, Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, I-73100 Lecce, Italy. Additional authors for this research include I. Greenfeld, F. Tantussi, M. Moffa, F. Fuso, M. Allegrini, E. Zussman and D. Pisignano (see also Nanofibers).

Keywords for this news article include: Lecce, Italy, Europe, Nanoscale, Nanotechnology, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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