Nanobiotechnology Department, The Italian Institute of Technology, via Morego 30, Genova, 16163, Italy.
Nanoscale Res Lett. 2009 May 8;4(8):865-72. doi: 10.1007/s11671-009-9337-3.
Two different ionic liquids have been tested in the electrochemical fabrication of anodic porous alumina in an aqueous solution of oxalic acid. It was found that during galvanostatic anodization of the aluminum at a current density of 200 mA/cm2, addition of 0.5% relative volume concentration of 1-butyl-3-methylimidazolium tetrafluoborate resulted in a three-fold increase of the growth rate, as compared to the bare acidic solution with the same acid concentration. This ionic liquid was also used successfully for an assessment of the wettability of the outer surface of the alumina, by means of liquid contact angle measurements. The results have been discussed and interpreted with the aid of atomic force microscopy. The observed wetting property allowed to use the ionic liquid for protection of the pores during a test removal of the oxide barrier layer.
两种不同的离子液体已在草酸水溶液中通过电化学方法制备阳极多孔氧化铝的过程中进行了测试。研究发现,在电流密度为 200mA/cm2 的条件下对铝进行恒电流阳极氧化时,与具有相同酸浓度的裸酸性溶液相比,添加相对体积浓度为 0.5%的 1-丁基-3-甲基咪唑四氟硼酸盐可使生长速率提高三倍。该离子液体还成功地用于通过液体接触角测量评估氧化铝外表面的润湿性。借助原子力显微镜对结果进行了讨论和解释。观察到的润湿性使得可以在测试去除氧化物阻挡层的过程中使用离子液体来保护孔。