The combination of colloid-controlled heterogeneous nucleation and polymer-controlled crystallization:: Facile synthesis of separated, uniform high-aspect-ratio single-crystalline BaCrO4 nanofibers

Uniform, separated BaCrO4 single-crystalline nanofibers with high aspect ratio (>5000, see Figure) can be fabricated at room temperature in aqueous solution using a double hydrophilic block copolymer as structure-directing agent and introducing colloidal nucleation agents. Such fibers represent a model case for advanced polymer fillers and the exploration of quasi-1D nanostructures with interesting electrical, optical, or catalytic properties.