Electrochemically Synthesized Co and Fe Nanowires and Nanotubes

Abstract

We report the synthesis of Co and Fe nanowires and nanotubes electrochemically deposited through nanoporous membranes. Depending upon the pulse electrodeposition parameters, the structure of Co nanowires is either a pure hexagonal phase or a polytype structure related to the stacking of hexagonal and face-centered cubic forms. Similarly, iron nanowires can be prepared with single or multicrystallographic phases. The control of the wire structure was achieved via the overpotential used to initiate growth. Moreover, nanotubes, whose formation could result from a complexation between metal ions and the polymeric membrane, were also directly synthesized.

Anisotropic magnetoresistance of individual CoFeB and Ni nanotubes with values of up to 1.4% at room temperature

“…Molecular beam epitaxy and epitaxial growth as reported for GaMnAs, MnAs, and Fe 3 Si nanotubes recently [10][11][12] ferromagnetic nanotubes were first fabricated by electrodeposition into nanoporous membranes. 13,14 Various other methods were developed such as hydrogen reduction of porous alumina templates preloaded with metallic salts 15 or decomposition of polymers containing a metallo-organic precursor wetting such templates. 16 Different deposition techniques including atomic layer deposition (ALD) were employed to fabricate tubes in nanopores 17,18 or as shells onto semiconductor nanowires.…”

Electrochemical synthesis and magnetism of magnetic nanotubes

“…Tourillon and Pontonnier (2000) reported the fabrication of Co and Fe NWs and NTs in polycarbonate templates with pore diameters of around 30 nm. Tourillon and Pontonnier (2000) reported the fabrication of Co and Fe NWs and NTs in polycarbonate templates with pore diameters of around 30 nm.…”

Integration Between Template‐Based Nanostructured Surfaces and Biosensors

“…The deposition can be carried out both under galvanostatic or potentiostatic conditions. Literature data report gold electrodeposition into alumina, mica, or PC templates in the form of nanowires or nanorods [183][184][185][186], as well as deposition of silver, cobalt, nickel, copper, and rhodium nanowires [187][188][189], iron nanotubes, or cigar-shaped nanoparticles into polymers [168,190], and palladium, platinum, and tin nanoparticles or single-crystal nanowires into both alumina and PC [191][192][193]. In the case of a track-etched PC membrane, it was verified that addition to the plating solution of 1 to 2% gelatin generally improves the hydrophilic properties of the membrane with an effective increase in the reproducibility of electrodeposition [166].…”