Moreover, the image verifies that the deposition of Co-Ni binary nanowires start from the bottom surface of alumina nanochannels as explained in the Figure 3b.
The diameter of the nanowires is relatively uniform along their entire length and equal to the diameter of alumina nanopores (approximately 40 nm). Figure 4e,f represents the tilted images of Co-Ni binary nanowires partially separated from the AAO template.
(a) AAO template with circular shape, (b) filling of nanopores started from Co-Ni binary nanowires at the bottom of AAO by exposing circular area to the Co and Ni precursor solution, (c) complete filling of the alumina nanopores from Co-Ni binary nanowires, (d) dissolution of alumina in NaOH to get Co-Ni binary nanowires.
It can be seen from the image that the nanopores of AAO template are filled completely with Co-Ni binary nanowires showing the uniform deposition and homogeneity of the nanowires by AC electrodepsoition.
It clearly shows that the growth of Co-Ni binary nanowires was restricted into the nanopores of AAO and suppressed the subsequent cape formation at the top.
The square shape and widening of the MH-loop of Co-Ni binary nanowires is smaller than the pure Co-nanowires [5].
(a) top surface and (b) cross-sectional view embedded in AAO template, (c, d) top surface view of Co-Ni binary nanowires partially liberated from AAO template at low and high magnification (e, f) tilted view at low and high magnifications.
The characteristic peaks in the spectrum are associated with Co, Ni, Al, O, and S. Co and Ni peaks arise from the co-deposited Co-Ni binary nanowires, while O and Al peaks are appearing from the matrix of alumina template, and S peak is due to the use of sulfuric acid as electrolyte for anodization.
This indicates that some Co-Ni binary nanowires have been broken and removed from the AAO template.
Finally Co-Ni binary nanowires were liberated by dissolving the AAO template (Figure 3d).
