Complex and oriented ZnO nanostructures
Complex and oriented ZnO nanostructures
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DOI：
10.1038/nmat1014
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发表时间：
2003-12-01
期刊：
影响因子：
41.2
通讯作者：
Xu, HF
中科院分区：
文献类型：
--
作者：
Tian, ZRR;Voigt, JA;Xu, HF
延伸型和取向型纳米结构在许多应用中都是可取的，但直接制备具有可控结晶形态、取向和表面结构的复杂纳米结构仍然是一个巨大的挑战。在这里，我们报道了一种低温、环境友好、基于溶液的方法来制备复杂的、定向的氧化锌纳米结构，并对其晶体形态进行了系统的修饰。利用晶种生长和选择性吸附在氧化锌基面上的柠檬酸阴离子作为结构导向剂，我们制备了具有可控长宽比的大量定向氧化锌纳米棒，由定向纳米柱和纳米板(与红鲍鱼壳中的生物矿物结构非常相似)组成的复杂薄膜形态，以及显示原位柱状到棒状形态转变的复杂双层膜。展示了其中一些氧化锌结构在光催化降解挥发性有机化合物方面的优势。这种新型的氧化锌纳米结构有望在传感、催化、光发射、压电转换和驱动等方面具有巨大的潜力。
Extended and oriented nanostructures are desirable for many applications, but direct fabrication of complex nanostructures with controlled crystalline morphology, orientation and surface architectures remains a significant challenge. Here we report a low-temperature, environmentally benign, solution-based approach for the preparation of complex and oriented ZnO nanostructures, and the systematic modification of their crystal morphology. Using controlled seeded growth and citrate anions that selectively adsorb on ZnO basal planes as the structure-directing agent, we prepared large arrays of oriented ZnO nanorods with controlled aspect ratios, complex film morphologies made of oriented nanocolumns and nanoplates (remarkably similar to biomineral structures in red abalone shells) and complex bilayers showing in situ column-to-rod morphological transitions. The advantages of some of these ZnO structures for photocatalytic decompositions of volatile organic compounds were demonstrated. The novel ZnO nanostructures are expected to have great potential for sensing, catalysis, optical emission, piezoelectric transduction, and actuations.