Influence of electrodeposition techniques on Ni nanostructures

Effect of temperature on the growth of α-PbO2 nanostructures

“…3b). The mechanism of the formation of these NTs is similar to that described in previous works, for Ni template electrodeposition under H 2 evolution [32,33]. At 60 • C gas evolution is even lower: this, combined with the greater pore activity, enables continuous deposition of PbO 2 inside the channels of the AAM leading to compact and cylindrical NWs (Fig.…”

Influence of the electrical parameters on the fabrication of copper nanowires into anodic alumina templates

“…Some NWs grow more rapidly, therefore they reach the surface template before others. [4,26]; however, we mention that uniform lengths of Cu NWs were obtained in [27] by using very high overvoltages. Moreover, the comparison between average lengths measured after 1 and 2 h of deposition suggests a slower growth rate for longer times, likely caused by a progressive depletion of Cu 2+ ions within membrane channels.…”

“…In the case of Ni deposition, an influence of the potential perturbation mode was found upon uniformity of template pore filling by metal [25]; in particular, these authors claim nonuniform length of metallic NWs under a constant deposition potential, owing to a progressive depletion of metal ions into the pores. Moreover, we found that morphology of Ni nanostructures changed depending on the kind of applied pulsed potential waveform [26]. Contrasting conclusions were reached in [27], where a scarce influence of potential waveform was observed upon length uniformity of electrodeposited copper NWs.…”

“…We have chosen the AAM as template because, as shown in our previous works, by electrochemical deposition into this template it is possible to fabricate nanowires or nanotubes of metals, oxides and alloys, like Ni [26,32], Cu 2 O [33,34], CeO 2 [35], PbO 2 [36], and CoSn [37]. Moreover, using AAM, regular arrays of cylindrical nanostructures are fabricated, in which every single wire has identical morphology, unlike nanostructures obtained in polycarbonate membranes, whose pores show a non-constant crosssection [31,38,39].…”

AL2O3-Me LAYERS OBTAINED BY ELECTROCHEMICAL METHOD

“…Anodic alumina membrane (AAM) produced by anodization of pure aluminium has become an important template material for the fabrication of nanostructured materials [1]. Considerable attention has been focused mainly on nanotubes [2], nanowires [3], as well as nanoporous materials. It is particularly due to their unique electronic, magnetic, optoelectronic, biomedical and mechanical properties [4].…”