摘要
Alumina nanostructures were obtained by two-step anodization process.The porous anodic aluminum oxide(AAO)membranes were anodized in oxalic acid,which was subsequently treated with chemical etching process with 1.0 mol/L sodiumhydroxide solution,or mixed solution of phosphoric acid(6.0%)and chromic acid(1.8%),respectively.Field emission scanningelectron microscopy(FE-SEM)and transmission electron microscopy(TEM)were employed to character the morphology andstructure of the obtained alumina nanostructure.It is found that alumina nanowires are generated in the acidic chemical etchingsolution,while nanotube structures are formed in the alkaline solution.The influence of acid and alkaline solution on aluminamorphologies in the chemical etching process was discussed.
Alumina nanostructures were obtained by two-step anodization process. The porous anodic aluminum oxide（AAO） membranes were anodized in oxalic acid, which was subsequently treated with chemical etching process with 1.0 mol/L sodium hydroxide solution, or mixed solution of phosphoric acid （6.0%） and chromic acid （1.8%）, respectively. Field emission scanning electron microscopy（FE-SEM） and transmission electron microscopy（TEM） were employed to character the morphology and structure of the obtained alumina nanostructure. It is found that alumina nanowires are generated in the acidic chemical etching solution, while nanotube structures are formed in the alkaline solution. The influence of acid and alkaline solution on alumina morphologies in the chemical etching process was discussed.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2007年第1期82-86,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(BG2005009)supported by Jiangsu Provincial Hi-Tech Research Program
关键词
铝
微观结构
化学腐蚀
阳极电镀
alumina nanostructure
chemical etch
nanopore
two-step anodization
