Zhou Hongjun, Wong Stanislaus S
Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, USA.
ACS Nano. 2008 May;2(5):944-58. doi: 10.1021/nn700428x.
ZnO nanowires, CuO nanowires, and alpha-Fe(2)O(3) nanotubes as well as their corresponding arrays have been successfully synthesized via a low cost, generalizable, and simplistic template method. Diameters of one-dimensional (1-D) metal oxide nanostructures ( approximately 60-260 nm), measuring micrometers in length, can be reliably and reproducibly controlled by the template pore channel dimensions. Associated vertically aligned arrays have been attached to the surfaces of a number of geometrically significant substrates, such as curved plastic and glass rod motifs. The methodology reported herein relies on the initial formation of an insoluble metal hydroxide precursor, initially resulting from the reaction of the corresponding metal solution and sodium hydroxide, and its subsequent transformation under mild conditions into the desired metal oxide nanostructures. Size- and shape-dependent optical, magnetic, and catalytic properties of as-prepared 1-D metal oxides were investigated and noted to be mainly comparable to or better than the associated properties of the corresponding bulk oxides. A plausible mechanism for as-observed wire and tube-like motifs is also discussed.
氧化锌纳米线、氧化铜纳米线、α-氧化铁纳米管及其相应阵列已通过一种低成本、可推广且简单的模板法成功合成。一维（1-D）金属氧化物纳米结构的直径（约60 - 260纳米），长度达微米级，可通过模板孔道尺寸可靠且可重复地控制。相关的垂直排列阵列已附着在许多具有几何意义的基底表面，如弯曲的塑料和玻璃棒图案。本文报道的方法依赖于首先形成一种不溶性金属氢氧化物前驱体，它最初由相应金属溶液与氢氧化钠反应产生，随后在温和条件下转化为所需的金属氧化物纳米结构。对所制备的一维金属氧化物的尺寸和形状相关的光学、磁性和催化性能进行了研究，发现其主要与相应块状氧化物的相关性能相当或更优。还讨论了所观察到的线状和管状图案的合理形成机制。
