Synthesis of ZnO nanowires by thermal decomposition of zinc acetate dihydrate
Synthesis of ZnO nanowires by thermal decomposition of zinc acetate dihydrate
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DOI：
10.1016/j.matchemphys.2008.07.070
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发表时间：
2009-01-15
影响因子：
4.6
通讯作者：
Li, Yuan-Yao
中科院分区：
文献类型：
--
作者：
Lin, Chih-Cheng;Li, Yuan-Yao
通过二水醋酸锌在空气中300℃热分解3小时，无需催化剂，合成了高纯度单晶ZnO纳米线。通过热重-差示扫描量热法和质谱法（TG-DSC-MS）对二水醋酸锌进行表征，以确定热分解和结晶温度。结果表明，ZnO 纳米线是通过脱水、汽化/分解和沉积/形成过程产生的，这与常见的气-液-固 (VLS) 机制不同。 X射线衍射表明ZnO纳米线具有纤锌矿晶体结构，扫描电子显微镜显示其直径和长度分别约为40 nm和几微米。高分辨率透射电子显微镜显示纳米线是单晶，沿[001]方向生长。此外，生长的 ZnO 纳米线的光致发光光谱结果表明其在紫外线发射装置中的可能应用。 (C) 2008 Elsevier B.V. 保留所有权利。
High-purity single crystal ZnO nanowires were synthesized by the thermal decomposition of zinc acetate dihydrate at 300 degrees C in air for 3 h without a catalyst. The zinc acetate dihydrate was characterized by thermogravimetric-differential scanning calorimetry and mass spectrometry (TG-DSC-MS) to determine the thermal decomposition and crystallization temperature. Results reveal that the ZnO nanowires were produced through a dehydration, vaporization/decomposition, and deposition/formation process, which differs from the common vapor-liquid-solid (VLS) mechanism. X-ray diffraction demonstrates that the ZnO nanowires have a wurtzite crystal structure, and scanning electron microscopy shows their diameter and length to be about 40 nm and a few micrometers, respectively. High-resolution transmission electron microscopy reveals that the nanowires are of a single crystal, which grew in the [001] direction. In addition, photoluminescence spectra results of the as-grown ZnO nanowires suggest possible applications in ultraviolet emission devices. (C) 2008 Elsevier B.V. All rights reserved.