Influence of wet etching time cycles on morphology features of thin porous Anodic Aluminum oxide (AAO) template for nanostructure's synthesis
Influence of wet etching time cycles on morphology features of thin porous Anodic Aluminum oxide (AAO) template for nanostructure's synthesis
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DOI：
10.1016/j.jpcs.2015.07.020
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发表时间：
2015-12
影响因子：
4
通讯作者：
K. Chahrour;N. M. Ahmed;M. Hashim;Nezar G. Elfadill;Ahmad M. Al-Diabat;M. Bououdina
中科院分区：
文献类型：
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作者：
K. Chahrour;N. M. Ahmed;M. Hashim;Nezar G. Elfadill;Ahmad M. Al-Diabat;M. Bououdina
本研究考察了化学湿法刻蚀时间循环对薄多孔AAO模板形貌的影响。通过室温湿法刻蚀扩孔，改善了AAO模板的孔质量，减少了AAO孔阵列底部的阻挡层，有利于在AAO模板上均匀电沉积纳米结构。在室温下分别以10、30和45min的可控扩孔周期制备了具有不同平均孔径(、70和87 nm)的高质量氧化铝微孔阵列。用FESEM、EDX、X射线衍射仪和原子力显微镜对AAO模板和所制备的铜纳米棒进行了表征。结果表明，铜纳米棒阵列的形貌受刻蚀时间和去除AAO模板的影响较大。这项研究表明，保持定向纳米棒不发生任何断裂所需的最佳刻蚀时间约为5分钟。当剥离时间为45min时，可以形成规则的半球形凹面，保证了AAO气孔的自有序性。因此，可以推断，在第一步阳极氧化后对氧化铝薄膜进行湿法刻蚀处理(剥离)的持续时间对纳米孔的最终排列起着至关重要的作用。
This study examines the influence of chemical wet etching time cycles on the morphological features of thin porous AAO template. Pore widening via wet-etching treatment at room temperature was found to modify the pore quality of AAO template and reduces the barrier layer on the bottom of AAO pore array in order to facilitate uniform electrodeposition of nanostructures onto AAO template. High quality AAO pore arrays with different mean pore diameters (64, 70, and 87 nm) were prepared under controllable pore-widening time cycles of 10, 30 and 45 min at room temperature, respectively. The AAO templates and the produced Cu nanorods were characterized using FESEM, EDX, XRD and AFM. The results indicate that the morphology of the aligned arrays of Cu nanorods is strongly affected by the duration of etching and the removal of AAO template. This study showed that the optimum etching duration required to maintain the aligned nanorods without any fracture is approximately 5 min. In addition, the regular hemispherical concave Al surface ensuring the self-ordering of AAO pore can be established when striping is employed for 45 min. Thus, it can be inferred that the duration of wet etching treatment (striping) of Al oxide film performed after the first-step anodization plays a vital role in the final arrangement of nanopores.