Modulating ZnO Nanostructure Arrays on Any Substrates by Nanolevel Structure Control
Modulating ZnO Nanostructure Arrays on Any Substrates by Nanolevel Structure Control
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DOI：
10.1021/jp201042t
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发表时间：
2011-04
影响因子：
3.7
通讯作者：
B. Ye;Hak Ki Yu;M. Kim;Jong‐Lam Lee;J. M. Baik
中科院分区：
文献类型：
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作者：
B. Ye;Hak Ki Yu;M. Kim;Jong‐Lam Lee;J. M. Baik
一个均匀的高纵横比的纳米纹理表面与一个非常密集的森林的垂直排列的纳米线，是由表面化学postfabrication的ZnO的诱导在nanolevel的结构转变。X射线光电子能谱验证了异质表面结构（GaOx的GaN和AuOx的Au）在纳米级的形成，以及通过UV/臭氧处理的表面化学计量的修改。结构转变有助于产生表面电荷，充当纳米尖端生长的成核位点。这导致了各种衬底（例如ZnO、Au、GaN和石墨烯）的纳米尖端的密度的显著增加和直径的改善。然而，通过O2等离子体处理的表面氧降低了作为暴露表面的活化位点的活性，导致纳米尖端的密度降低。这种合理的工程基板的结构转换在纳米水平上可能提供一个有前途的方法，生产纳米材料。
A uniform high-aspect-ratio nanotextured surface with a very dense forest of vertically aligned nanowires that was produced by surface chemical postfabrication of ZnO was induced by a structural transformation at the nanolevel. X-ray photoelectron spectroscopy verified the formation of the heterogeneous surface structures (GaOx on GaN and AuOx on Au) at the nanolevel as well as the modification of surface stoichiometry by UV/ozone treatment. The structural transformation contributes to generating a surface charge, acting as nucleation sites for nanotip growth. This led to a significant increase in density and improvement in diameter of the nanotips for various substrates, such as ZnO, Au, GaN, and graphene. However, the surface oxygen by O2 plasma treatment reduced the activity as activation sites of the exposed surface, resulting in the decrease of the density of the nanotips. This rational engineering of substrates by a structural transformation at the nanolevel may provide a promising method for produc...