Fig. 2

a Coating of of nFHs on flat glass, ITO, PET substrates, and a Pt wire. b Schematic illustration of nFH patterning with the micro-contact printing method. c Confocal microscopy images of patterned nFHs on a PLL-coated glass substrate. d Confocal microscopy images of drop- and bar-coated nFHs at designated bar-moving speeds. e Statistical distributions of nFHs shown in d. f Schematic illustration of aligning nFHs under shear forces