Tian Zhengrong R, Voigt James A, Liu Jun, McKenzie Bonnie, McDermott Matthew J, Rodriguez Mark A, Konishi Hiromi, Xu Huifang
Materials and Process Sciences Center, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
Nat Mater. 2003 Dec;2(12):821-6. doi: 10.1038/nmat1014. Epub 2003 Nov 23.
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.
对于许多应用而言，具有特定取向的延伸纳米结构是理想的，但直接制备具有可控晶体形态、取向和表面结构的复杂纳米结构仍然是一项重大挑战。在此，我们报告一种基于溶液的低温、环境友好型方法，用于制备复杂且具有特定取向的ZnO纳米结构，并对其晶体形态进行系统修饰。通过控制种子生长，并使用选择性吸附在ZnO基面的柠檬酸根阴离子作为结构导向剂，我们制备出了具有可控长径比的大量取向ZnO纳米棒阵列、由取向纳米柱和纳米板构成的复杂薄膜形态（与红鲍贝壳中的生物矿物结构极为相似）以及呈现原位柱到棒形态转变的复杂双层结构。这些ZnO结构中的一些在光催化分解挥发性有机化合物方面的优势得到了证明。预计这种新型ZnO纳米结构在传感、催化、光发射、压电转换和驱动方面具有巨大潜力。
