| dc.description.abstract | In our experiment, alumina nanopores were prepared in oxalic acid with high purity (99.99％) aluminum foils by anodization method. In the anodization process, we discuss the influence of the pore diameter, interpore distance, and the thickness of alumina upon the anodization voltage.
The size of alumina channel and interchannel distance were rearranged by changing the voltage during anodization. When the anodization voltage convert to 2- fold, the size of alumina channel and interchannel distance will increase. And when the voltage change to -fold, the channel size and interchannel distance will decrease. Meanwhile, it will lead to cleavage of the channel. The interchannel distance will not change in the same anodization voltage. Accordingly, sodium hydroxide were used for pore-widening before anodization. This process will result in different diameters of the pores at two sides of the channel. Finally, we switch the potential increase/ decrease and pore-widening step to produce alumina channels with different morphologies.
In another way, we use the anodized alumina as a template to prepare bismuth nanowire array by electrochemical deposition. | en_US |