Nanochannel arrays with constant nanochannel density but varying nanochannel
diameters in different areas in one piece of anodic alumina membrane are
achieved. Using this type of membrane as a template, ordered Pb nanowire arrays
with constant nanowire density but diameters decreasing radially were obtained
by electrodeposition. Scanning electron microscopy and transmission electron
microscopy (TEM) images taken from different areas of the Pb nanowire
arrays show that we can control the growth of aligned Pb nanowires with
different diameters in a single process at one time. The individual Pb
nanowires have been characterized using selected-area electron diffraction and
high-resolution TEM. Nanometre-scale fibrils, rods, wires, and tubules of
metal, semiconductor, carbon, and other materials with the same density
but different diameters in different areas can be fabricated using this
type of template, in combination with other fabrication techniques. The
simultaneous integration of ordered nanowire structures with different
diameters embedded in a single anodic alumina membrane could be useful in
nanodevice manufacture as well as electronics, optoelectronics, and magnetics.
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