以多孔阳极氧化铝为原料，用NaOH溶液进行化学腐蚀，控制适当的条件得到氧化铝纳米柱和纳米柱团簇结构。利用扫描电子显微镜对其结构进行观察。结果表明，独立纳米柱直径约100 nm，高约100~250 nm；纳米柱团簇是由直径约100 nm、高约1 μm的纳米柱组成，团簇之间间距约1~2 μm。该结构的表面和光滑氧化铝表面、多孔阳极氧化铝（纳米孔洞结构）表面分别修饰氟硅烷后，氧化铝纳米柱束团簇结构表面对水的接触角高达155°，比光滑表面（101°）和纳米孔洞结构表面（144°）都要高。

Alumina nanopillars and nanopillar clusters are fabricated through etching porous anodic alumina membranes by NaOH solution under proper conditions.It is found through field-emission scanning electron microscopy (SEM) that the diameter and height of the single Al₂O₃ nanopillar are about 100 nm and 100-250 nm respectively,the nanopillar clusters consist of the nanopillars with a diameter of 100 nm and a height of 1 m,and the distance between the nanopillar clusters is about 1-2 m.After the surfaces of the smooth alumina,the porous alumina membrane (nanochannel structure) and the nanopillar clusters are separately modified by fluoroalkylsilane (FAS),the contact angle to water of the nanopillar clusters surface is as high as 155°,higher than those of the smooth surface (101°) and the nanochannel-structured surface (144°).

陈新华(1971-),男,博士,教授,主要研究方向为微纳米结构材料和功能界面材料,503458834@qq.com