This talk summarizes recent work in our group exploring exciton coupling, diffusion, and dissociation in isolated polymer and polymer-composite nanoparticles and nanofibers. We use a combination of wavelength-, time-, and polarization-resolved photoluminescence measurements, from which information on molecular orientation, coupling strengths, and time-scales for inter- and intra-chain de-excitation processes can be accessed directly.  In addition, we discuss near-field optics based absorption probes of isolated nanoparticles, nanowires, and other composite molecular assemblies.  This approach enables access to structural information without photoluminescence, which is useful for mixtures of n- and p-type semiconducting materials in which the luminescence is usually strongly quenched.

Probing exciton dynamics in isolated semiconducting polymer and polymer-composite nanostructures

246th National Meeting (2013)

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