Hybrid composites of inorganic nanoparticle embedded in a π-conjugated polymer matrix have attracted considerable attention due to their unique chemical and physical features, which arise from the synergistic effects between both phases. Since the homogeneity of the organic/inorganic interface is a decisive factor in determining final properties, a great deal of progress has been made in the past in controlling self-assembly of polymer and nanoparticle through stronger covalent interactions, but an efficient method for fabrication of ordered polymer/nanoparticle morphology from weaker non-covalent bonds is still missing. Therefore, we have developed a logical supramolecular strategy to assemble polymer and nanoparticle into hierarchically ordered structures using non-covalent interactions (hydrogen bonding, π- π interactions, etc.). Here we show that functionalized conjugated polymer can be linked with ligand-stabilized nanoparticles to form a well-ordered core/shell composite nanofiber structure, which display excellent conducting properties of the polymer, together with enhanced optical properties when combined with quantum dots, or magnetic properties when associated with iron oxide nanoparticles. We have applied such composite nanofibers into organic photovoltaic devices and achieved a greater control over the active layer morphology. Also, we have conducted the first demonstration of incorporating polymer/magnetic nanoparticle nanocomposites into concentration cells and obtained a long-lasting voltage output. Our strategy can be a simple and general route for assembling two incompatible components into well-ordered structures, and should be applied in designing modern energy and electronic devices.

Hybrid polymer/inorganic nanoparticle composite nanofibers through cooperative non-covalent interactions

2019 Fall National Meeting

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