Template Synthesis and Magnetic Behavior of an Array of Cobalt Nanowires Encapsulated in Polyaniline Nanotubules

Abstract

Metallic nanowires protected from oxidation and corrosion by a sheath of polyaniline have been prepared in arrays on an alumina membrane support. The cobalt wire/polyaniline tubule nanocomposite structures (see Figure), which are produced by using the polyaniline tubules as a template for the growth of the metal wires, have potential in applications such as magnetic antenna materials.

Room temperature magnetic materials from nanostructured diblock copolymers

“…However, the BCP's H c is 20-40 times larger than that of a continuous Co film (H c = 10 Oe) 15 and comparable to the H c (186-209 Oe) reported for hexagonally packed cylinders (20 nm diameter) grown in alumina membranes 42 . Cobalt nanoparticles with dimensions similar to the cylinder diameter of the BCP reported H c values of 68 Oe 21 .…”

Non-Polar Polymer Nanotubes and Nanowires Fabricated by Wetting Anodic Aluminium Oxide Template

“…Especially, polymer nanotubes has attracted growing research interest due to their novel properties and wide potential application for nanodevices. [1][2][3][4][5][6][7] There are two main methods for preparing polymer nanotubes in AAO template. One is chemical synthesis; the other is physical wetting.…”

“…Many polar polymer nanotubes have been reported so far. Most of them have been prepared using former method, such as Polyamide 6, Poly-L-lactide (PLLA), Polytetrafluoroethylene (PTFE), Poly (vinylidene difluoride) (PVDF), and so on, 2,[4][5][6]8 and some of them have been prepared by the latter one. 3,[9][10][11] However, the preparation of non-polar polymer nanotubes has rarely been reported.…”

An Array of Concentric Composite Nanostructures of Zirconia Nanotubules/Cobalt Nanowires: Preparation and Magnetic Properties

“…The ZrO 2 envelope protects the metal nanowires from oxidation and corrosion, therefore making them stable in air. [18] This new type of composite nanostructure is suitable in microelectronic devices such as chemical sensors and ultra-high-density magnetic recording, etc.Of the several preparation methods for ZrO 2 , the sol±gel technique has attracted a lot of attention because of its low cost and processing simplicity. [19,20] We used a solution of zirconyl chloride octahydrate, which is cheaper than the alkoxide (a common precursor in sol±gel processing), as the precursor in the sol±gel processing, and a PAA membrane as the template for preparing the ZrO 2 nanotubules.…”

“…The ZrO 2 envelope protects the metal nanowires from oxidation and corrosion, therefore making them stable in air. [18] This new type of composite nanostructure is suitable in microelectronic devices such as chemical sensors and ultra-high-density magnetic recording, etc.…”