SELF-ORGANIZED FORMATION OF HEXAGONAL NANOPORE ARRAYS IN ANODIC ALUMINA
ZHOU WEI-YA;TANG DONG-SHENG;LI YU-BAO;LIU ZU-QIN;ZOU XIAO-PING;WANG GANG
【期刊名称】《中国物理:英文版》 【年(卷),期】2001(010)003
【摘要】Conditions for a self-organized formation of ordered hexagonal structure in anodic alumina were investigated, using oxalic or sulphuric acid as an electrolyte. Highly-ordered nanopore arrays with pore densities of 9 × 109- 6.5 × l0l0cm-2 and high aspect ratios over 3000 were fabricated by a two-step anodization process. The array exhibits characteristics analogous to a two-dimensional polycrystalline structure of a few micrometres in size. The interporc distance can be controlled by changing the electrolyte and/or the applied voltage. The formation mechanism of ordered arrays is consistent with a previously proposed mechanical stress model, i.e., the repulsive forces between neighbonring pores atrnthe metal/oxide interface promote the formation of hexagonally ordered pores during the oxidation process. 【总页数】5页(218-222)
【关键词】anodic alumina;nanochannel array;self-organization;porous film
【作者】ZHOU WEI-YA;TANG DONG-SHENG;LI YU-BAO;LIU ZU-