Sketch of the pulse cycle for pulse dc electrodeposition. is the pulse duty time and is the pulse relaxation time.
Morphology of Co nanowire arrays (SEM). Template without chemical etching: (a) cross-sectional view and (b) plan view. Templates etched in a NaOH solution for (c) and (d) .
XRD patterns from (a) AAO template with sputtered Au layer and from template∕nanowire arrays fabricated at (b) and (c) .
TEM images of hcp Co nanowires: (a) hcp Co nanowire bundles; (b) a single nanowire and its corresponding SAED pattern; (c) bright-field image of a hcp Co nanowire and its corresponding SAED pattern; (d) lattice image of (c).
TEM images of fcc Co nanowires: (a) bright-field image of a fcc Co nanowire and its corresponding SAED pattern [counting outwards, the rings are indexed to the (111), (200), (220), and (311) reflections of fcc Co]; (b) lattice image of (a).
Magnetic hysteresis loops at room temperature of Co nanowire arrays for different crystal structures, with the applied field parallel (solid curves) and perpendicular (dashed curves) to the nanowire axis.
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