10 September 2013 White fluorescent nano-fibers prepared by periodic organic hetero-epitaxy
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To preserve the morphological properties of para-hexaphenyl (p-6P) based nano- bers and simultaneously tune their emission wavelength, periodic organic-organic hetero-epitaxy was utilized. Multilayer structures of p-6P and -sexithiophene (6T) have been prepared by hot wall epitaxy and analyzed by scanning force microscopy, uorescence microscopy, X-ray di raction and time resolved spectroscopy. We demonstrate that organic heteroepitaxy can be applied to produce multilayered nano- bers with high crystallinity, well de ned epitaxial relationships along di erent material phases, molecular azimuthal order, and long-range morphological homogeneity. It is shown, that it is possible to precisely control and tune the highly polarized photoluminescence emission of the nano- bers from the blue to the green and orange spectral regime by a variation of the 6T concentration. Remarkably, it is possible to prepare nano- bers emitting white polarized light.
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G. Schwabegger, G. Schwabegger, F. Quochi, F. Quochi, G. Hernandez-Sosa, G. Hernandez-Sosa, T. Djuric, T. Djuric, G. Bongiovanni, G. Bongiovanni, A. Vollmer, A. Vollmer, M. Oehzelt, M. Oehzelt, I. Salzmann, I. Salzmann, R. Resel, R. Resel, N. Koch, N. Koch, H. Sitter, H. Sitter, C. Simbrunner, C. Simbrunner, "White fluorescent nano-fibers prepared by periodic organic hetero-epitaxy", Proc. SPIE 8827, Optical Processes in Organic Materials and Nanostructures II, 882707 (10 September 2013); doi: 10.1117/12.2023033; https://doi.org/10.1117/12.2023033

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