Effects of anodization and electrodeposition conditions on the growth of copper and cobalt nanostructures in aluminum oxide films |
| |
Authors: | Abbas Ghaddar Jacek Gieraltowski Frederic Gloaguen |
| |
Affiliation: | (1) Laboratoire de Magnétisme de Bretagne, FRE CNRS 2697, Université de Bretagne Occidentale, CS 93837, 29238 Brest Cedex, France;(2) Laboratoire de Chimie Electrochimie Moléculaires et Chimie Analytique, UMR CNRS 6521, Université de Bretagne Occidentale, CS 93837, 29238 Brest Cedex, France |
| |
Abstract: | Anodic aluminum oxide (AAO) films were prepared by alternative current (ac) oxidation in sulfuric acid and phosphoric acid
solution. The porous structure of the AAO templates was probed by ac electrodeposition of copper. AAO templates grown using
an applied square waveform signal in cold sulfuric acid solution exhibit a greater pore density and a more homogeneous barrier
layer. UV–vis–NIR reflectance spectra of the Cu/AAO assemblies exhibit a plasmon absorption peak centered at 580 nm, consistent
with the formation of Cu nanostructures slightly larger than 10 nm in diameter. Spectroscopic data also indicate that there
is little or no oxide layer surrounding the Cu nanostructures grown by ac electrodeposition. The effect of pH of the cobalt
plating solution on the magnetic properties of the Co/AAO assemblies was also investigated. Co nanowire arrays electrodeposited
at pH 5.5 in H2SO4-grown AAO templates exhibit a fair coercivity of 1325 Oe, a magnetization squarness of about 72%, and a significant effective
anisotropy.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
| |
Keywords: | Aluminum Anodization Cobalt Copper Electrodeposition Nanowire |
本文献已被 SpringerLink 等数据库收录! |
|