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J Microsc. 2004 Sep;215(Pt 3):241-4.

Near-field imaging of organic nanofibres.

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  • 1Institute of Physics and Nanotechnology, Aalborg University, Pontoppidanstraede 103, DK-9920 Aalborg, Denmark.


The optical near-field of orientated nanofibres of para-hexaphenyl was investigated by a combination of localized far-field ultraviolet excitation and scanning near-field fluorescence detection. Morphological inhomogeneities of the nanofibres together with selective incoupling into the near-field probe resulted in a detection sensitivity was dependent on individual nanoaggregates. Strongest near-field intensity and radiation into the far-field were observed at the crossing points of nanofibres. The near-field observation of a distance-dependent damping of the waveguiding along the nanofibres allowed us to determine the imaginary part of the dielectric function of the nanofibres, in quantitative agreement with far-field optical data.

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