Nanostructured ZnO films in forms of rod, plate and flower: Electrodeposition mechanisms and characterization
Nanostructured ZnO films in forms of rod, plate and flower: Electrodeposition mechanisms and characterization
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DOI：
10.1016/j.apsusc.2016.03.111
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发表时间：
2016-07-30
影响因子：
6.7
通讯作者：
Ufuktepe, Yuksel
中科院分区：
文献类型：
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作者：
Kicir, Nur;Tuken, Tunc;Ufuktepe, Yuksel
良好定义的ZnO纳米结构的均匀性和再现性是这些纳米材料的制备和应用的特别重要的问题。在本研究中，我们报告了在电沉积过程中的选择性形态控制，通过调节羟基生成速率和Zn（OH）（2）沉积。在显着高的氯化物浓度（0.3M）和-1.0V沉积电位的存在下，在5 mM Zn（NO3）（2）溶液中提供缓慢沉淀条件。通过这样做，我们得到了高度有序，垂直排列和均匀间隔的六边形纳米片，在ITO表面。我们还研究了ZnO的形态从棒/板到花状结构的转变机制，以更好地理解再现性。出于这个原因，各种支持电解质（钠/铵盐的乙酸盐）的影响进行了研究，解释表面附近的OH-浓度的影响。从棒状到片状和花状纳米结构，利用X射线光电子能谱（XPS）和X射线衍射（XRD）对其进行了表征，并对其光学性质进行了研究。(C)© 2016 Elsevier B. V.版权所有。
Uniformity and reproducibility of well-defined ZnO nanostructures are particularly important issues for fabrication and applications of these nanomaterials. In present study, we report selective morphology control during electrodeposition, by adjusting the hydroxyl generation rate and Zn(OH)(2) deposition. In presence of remarkably high chloride concentration (0.3M) and -1.0V deposition potential, slow precipitation conditions were provided in 5 mM Zn(NO3)(2) solution. By doing so, we have obtained highly ordered, vertically aligned and uniformly spaced hexagon shaped nanoplates, on ITO surface. We have also investigated the mechanism for shifting the morphology from rod/plate to flower like structure of ZnO, for better understanding the reproducibility. For this reason, the influence of various supporting electrolytes (sodium/ammonium salts of acetate) has been investigated for interpretation of the influence of OH- concentration nearby the surface. From rod to plate and flower nanostructures, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis were realized for characterization, also the optical properties were studied. (C) 2016 Elsevier B.V. All rights reserved.