Preparation of electrodeposited cobalt nanowires

Valeska Da Rocha Caffarena,Jefferson Leixas Capitaneo,Alberto Passos Guimarães,Renata Antoun Simão

doi:10.1590/s1516-14392006000200017

Valeska Da Rocha Caffarena, Jefferson Leixas Capitaneo + Show 2 more

Open Access

https://doi.org/10.1590/s1516-14392006000200017

Copy DOI

Journal: Materials Research	Publication Date: Jun 1, 2006
Citations: 27	License type: cc-by

Affiliation: Centro Brasileiro de Pesquisas Físicas

Abstract

Nanostructured magnetic materials have great interest because of their applications in high-density magnetic information storage and for magnetic sensors. The electrodeposition of materials into porous alumina arrays is a suitable technique to produce nanomaterials, since highly ordered uniform nanomaterials can be obtained simply and cheaply. In this work, template-assisted Co nanowire arrays were prepared by electrodeposition into nanometer-sized pores of an alumite film using a two-electrode electrochemical cell. The Co nanowires were electrodeposited from a solution of 400 g/L of CoSO4.7H2O and 40 g/L of H3BO3. The morphology of the samples was investigated by means of TEM and AFM. The structural characteristic of the samples was examined using XRD, EDX and FTIR, which confirm the cobalt nanowire formation.

Highlights

There has been great interest in the synthesis and characterization of one-dimensional materials as nanotubes, nanobelts and nanowires
The polished Al sheet was anodized at 10 V for 10 minutes and the formed oxide film was dissolved in 1% H PO at 60 °C for minutes
After dissolving the alumina membranes (AAM) template in 1.25 M NaOH, the cobalt nanowire array was put on a silicon substrate and observed using Atomic Force Microscopy (AFM) (Figure 3) and Transmission Electron Microscopy (TEM) (Figure 4)

Summary

Introduction

There has been great interest in the synthesis and characterization of one-dimensional materials as nanotubes, nanobelts and nanowires. A variety of materials can be obtained in the form of nanowires with a diameter in the range of nm and lengths going up to several micra[1,2,3,4]. The templates can be nanoscale channels in self-organized anodic alumina membranes (AAM) or polycarbonate membranes[1,2,3], whose pores can be filled by the metal obtained by electrochemical reduction. These obtained nanostructures can be used in interesting magnetic recording, electronic and electro-optical devices[1,2,3]

Methods

Results

Conclusion