A novel approach for the formation of Mg(OH)(2)/MgO nanowhiskers on magnesium: Rapid anodization in chloride containing solutions

作者：Hahn R; Brunner J G; Kunze J; Schmuki P; Virtanen S^*

来源：Electrochemistry Communications, 2008, 10(2): 288-292.

DOI：10.1016/j.elecom.2007.12.007

• nanowhisker
• anodization
• magnesium
• Mg(OH)(2)
• MgO

In the present work we report on the electrochemical formation towards layers of multiscale MgO nanowhiskers by a two step approach. First, metallic magnesium was anodized under "high-voltage"-conditions in chloride containing ethanol/water mixtures. This results within seconds in the formation of dense areas of magnesium hydroxide nanowhiskers on the surface. The individual as-grown whiskers have a needle tip shape, and a length depending on the growth time of up to 20 mu m. The whiskers can be transformed to MgO by a thermal annealing process. To gain more insight into this very rapid growth process, the paper describes the influences of the key parameters of the anodization (pH, ion-concentration, electrolyte composition) and the effect of the thermal treatment on the morphology. All steps were characterized using SEM, EDX, XRD and XPS measurements.

• 出版日期2008-2