Synthesis and Characterization of Iron Oxyhydroxide Nanowires

Author

Londoño-Calderon, Cesar Leandro ; Bilovol, Vitaliy ; Cosio-Castañeda, Carlos ; Pampillo, Laura G. ; Micheli, Sabina R. ; Pirota, K.R. ; Socolovsky, L.M. ; Martinez-Garcia, R.

Author_Institution

Lab. de Solidos Amorfos, Univ. de Buenos Aires, Buenos Aires, Argentina

Volume

49

Issue

8

fYear

2013

fDate

Aug. 2013

Firstpage

4502

Lastpage

4505

Abstract

A very simple method of synthesis of goethite, α-FeOOH, nanowire is reported. To fabricate the nanowires, an anodized alumina nanoporous template (AAO) is used. AAO has pores with an average diameter of 60 nm. The synthesis is based on a self-combustion reaction of the chemical precursor (Fe(NO₃)₃ saturated solution) which occurs inside the nanopores. The geometry of AAO determines the morphology of the nanowires and the confinement conditions in which the heat treatment determines the composition of the nanostructure. The nanowires are characterized using scanning electron microscopy, high resolution transmission electron microscopy and magnetometry [magnetization versus applied field (M versus H)]. TEM analysis indicates that nanowires are composed of several α-FeOOH single crystals. The nanowires have a clear magnetic oriented structure.

Keywords

anodisation; combustion synthesis; heat treatment; iron compounds; magnetic structure; magnetisation; nanofabrication; nanomagnetics; nanoporous materials; nanowires; scanning electron microscopy; transmission electron microscopy; FeOOH; FeOOH single crystals; TEM analysis; anodized alumina nanoporous template; chemical precursor; goethite; heat treatment; high-resolution transmission electron microscopy; iron oxyhydroxide nanowires; magnetic oriented structure; magnetization; magnetometry; nanopores; nanostructured materials; nanowire morphology; scanning electron microscopy; self-combustion reaction; Geometry; Iron; Magnetic anisotropy; Materials; Nanowires; Saturation magnetization; Scanning electron microscopy; Iron oxide; iron oxyhydroxide; nanowires; structural and magnetic properties;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2255027

Filename

6566218