Assembly of electrospun nanofibers into crossbars

We report an approach for the hierarchical assembly of nanofibers into crossbar nanostructures. The polymer nanofibers are created through electrospinning process with diameters ranging in 10-80 nm and lengths of up to centimeters. By controlling the electrostatic field and the polymer rheology of the nanofibers, they can be assembled into parallel periodic arrays.