Porous anodic alumina with continuously manipulated pore/cell size
Porous anodic alumina with continuously manipulated pore/cell size
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具有连续控制孔/孔尺寸的多孔阳极氧化铝
DOI：
10.1021/nn700389j
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发表时间：
2008-05-01
期刊：
影响因子：
17.1
通讯作者：
Xia, Xing-Hua
中科院分区：
文献类型：
--
作者：
Chen, Wei;Wu, Jian-Shuang;Xia, Xing-Hua
我们使用聚乙二醇（PEG）作为调节剂来操纵多孔阳极氧化铝（PAA）制造中的孔和泡孔尺寸。这是第一次表明，连续操纵的PAA的孔径可以实现。结合共存的细胞尺寸控制效应，这种重要的纳米模板和分离膜的形态和性能可以精确调控。根据形貌和电化学结果，提出了孔径调制机理。电解质中PEG的存在导致阻挡层氧化铝（BLA）的更致密的结构，尽管阻挡层厚度没有显著变化。添加剂能明显抑制氧化铝的化学溶解，形成较小的气孔。这两种效应与电解液粘度的增加相结合，减缓了离子传输并减小了阳极氧化电流。因此，在相对高的电压阳极氧化的铝基板的烧毁现象，可以避免，并可以实现高达610 nm的孔间距离。
We used polyethyleneglycol (PEG) as a modulator to manipulate pore and cell sizes in the porous anodic alumina (PAA) fabrication. It is shown for the first time that continuous manipulation of the pore size of PAA can be realized. Combined with the coexistent cell-size controlling effect, the morphology and properties of this important nanoscale template and separation membrane can be precisely regulated. The pore size modulation mechanism is proposed on the basis of the morphological and electrochemical results. The presence of PEG in the electrolyte results in a more compacted structure of the barrier layer alumina (BLA), although the barrier layer thickness does not change considerably. In addition, the additive can obviously restrain the chemical dissolution of alumina and shape smaller pores. These two effects combined with the increased viscosity of the electrolyte slow down the ion transportation and diminish the anodization current. Thus, the burning-down phenomena of the aluminum substrates can be avoided at relatively high voltage anodization, and an interpore distance up to 610 nm can be achieved.