Synthesis and optical properties of ZnO nanowires with a modulated structure

Synthesis and optical properties of ZnO nanowires with a modulated structure
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调制结构ZnO纳米线的合成及光学性质

DOI:
10.1088/0022-3727/41/19/195406
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发表时间:
2008-10
期刊:
J. Phys. D: Appl. Phys.
影响因子:
--
通讯作者:
张喜田
张喜田
中科院分区:
其他
文献类型:
--
作者:
张喜田

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以In和ZnO混合粉末为前驱体,采用气相传输冷凝法在硅衬底上制备了具有调制结构的一维ZnO纳米线。每个纳米线具有均匀的直径尺寸,由交替堆叠的反转边界和In/Zn-O块沿其生长方向沿着。这种调制的纳米结构的形成归因于由In掺杂引起的晶格应变的弛豫,并且基于高分辨率透射电子显微镜(HRTEM)结果给出了它们的原子结构模型。在光致发光测量中,在10 K至室温范围内仅观察到宽的紫外(UV)发射峰。讨论了紫外发射的动力学过程。
One-dimensional ZnO nanowires with a modulated structure were synthesized on silicon substrates by a vapour transport and condensation method, using a mixture of In and ZnO powders as a precursor. Each nanowire that has a diameter of uniform size consists of alternating stacks of inversion boundaries and an In/Zn-O block along its growth direction. The formation of such modulated nanostructures is attributed to the relaxation of the lattice strain induced by In doping and their atomic structural model is presented on the basis of the high-resolution transmission electron microscopy (HRTEM) results. In photoluminescence measurements, only a broad ultraviolet (UV) emission peak was observed in the range 10 K to room temperature. The dynamic process of the UV emission was discussed.
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