Full text loading...
(a) Low magnification SEM image of the nanopencils, showing pen tips on the nanopencils with the inset for an enlarged view of a pen tip; (b) SEM image of a penholder; (c) SEM image of a nanopencil with a pen tip; (d) the schematic idealized growth habit of ZnO; and (e) the schematic growth mechanism of a pen tip.
(a) TEM image of a nanopencil; (b) electron diffraction pattern taken from the nanopencil shown in (a); (c) high-resolution TEM image of a nanopencil; (d) TEM image of a pen tip; and (e) an enlarged view of the pen tip shown in (a), revealing the initial half-angle of the tip is around 4°.
Field-emission measurements of the ZnO nanopencils. (a) Current density-electric field characteristics with the inset for the corresponding F–N plot. (b) Current density reproducibility recorded at an applied field of .
Article metrics loading...