Abstract
In this work, CoFe2O4 nanowire was fabricated by using a self-designed double-pass porous alumina template. The double-pass porous alumina template was prepared by a two-step oxidation method using a mixed acid (phosphoric acid and oxalic acid) electrolyte and polymethyl methacrylate (PMMA) filler. The combustion of aluminum foil at a high voltage has been effectively resolved by using this mixed acid electrolyte. Additionally, the range of pore diameters has been obviously increased to 230–400 nm by using PMMA as the filler, which can prevent contact between the pore and solution when removing the barrier layer. Subsequently, CoFe2O4 ferrite nanowire arrays were successfully fabricated into the double-pass porous alumina template by an electrochemical deposition method, and show an anisotropic feature of magnetic properties.
Highlights
One-dimensional magnetic nanomaterials such as nanowires, nanotubes, and nanorods have attracted much attention due to their potential applications in magnetic integrated nanosystems, perpendicular magnetic records, microwave absorbing, and spintronic nanodevices [1,2]
A double-pass alumina oxide (AAO) template was prepared by a two-step oxidation method using a mixed acid of
A double-pass AAO template was prepared by a two-step oxidation method using a mixed acid phosphoric acid and oxalic acid as the electrolyte and polymethyl methacrylate (PMMA) as the filler
Summary
One-dimensional magnetic nanomaterials such as nanowires, nanotubes, and nanorods have attracted much attention due to their potential applications in magnetic integrated nanosystems, perpendicular magnetic records, microwave absorbing, and spintronic nanodevices [1,2]. The AAO template parameters, including the pore diameter and thickness, were adjusted by the oxidation conditions, such as the etching time, anodization time and electrolytes [22,23]. The preparation of double-pass AAOs with large-diameter pores has great significance and faces some problems. A double-pass AAO template with a pore diameter range of 230–400 nm was prepared by using two-step anodization with a mixed acid (phosphoric acid and oxalic acid) as the electrolyte and polymethyl methacrylate (PMMA) as a pore filler. The obtained large range of pore diameters of the AAO template is believed to be highly applicable for fabricating magnetic nanomaterials. The CFO ferrite nanowires was successfully fabricated into the double-pass porous alumina template by the electrochemical deposition method
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