Large-Scale Synthesis of Long Crystalline Cu2-xSe Nanowire Bundles by Water-Evaporation-Induced Self Assembly and Their Application in Gas Sensing
Large-Scale Synthesis of Long Crystalline Cu2-xSe Nanowire Bundles by Water-Evaporation-Induced Self Assembly and Their Application in Gas Sensing
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水蒸发诱导自组装大规模合成长晶 Cu2-xSe 纳米线束及其在气体传感中的应用
DOI：
10.1002/adfm.200801430
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发表时间：
2009-06-09
影响因子：
19
通讯作者：
Yang, Shihe
中科院分区：
文献类型：
--
作者：
Xu, Jun;Zhang, Weixin;Yang, Shihe
通过不添加任何导向剂的简易水蒸发过程，获得了直径为100=300 nm且长度高达数百微米的Cu 2-xSe纳米线束，其包括直径为5-8 nm的结晶纳米线。实验揭示了CuSe纳米片的初始形成/堆叠以及随后的Cu 2-xSe纳米线束的transmittance。提出了水蒸发诱导自组装（WEISA）机制，强调了蒸发在促进纳米片堆叠、CuSe向Cu 2-xSe转变以及Cu 2-xSe纳米线生长/成束中的驱动力.这种重要的纳米线材料合成的简单性、温和性、可扩展性和高产率预示着它的许多应用。作为一个例子，使用的Cu 2-xSe纳米线束作为光致发光型湿度传感器被证明，这显示出良好的灵敏度，理想的线性度，快速响应/恢复和长寿命在非常宽的湿度范围内在室温下。
By a facile water evaporation process without adding any directing agent, Cu2-xSe nanowire bundles with diameters of 100=300 nm and lengths up to hundreds of micrometers, which comprise crystalline nanowires with diameters of 5-8 nm are obtained. Experiments reveal the initial formation/ stacking of CuSe nanoplates and the subsequent transormation to the Cu2-xSe nanowire bundles. A water evaporation-induced self-assembly (WEISA) mechanism is proposed, which highlights the driving force of evaporation in promoting the nanoplate stacking, CuSe-to-Cu2-xSe transformation and the growth/bundling of the Cu2-xSe nanowires. The simplicity, benignancy, scalability, and high-yield of the synthesis of this important nanowire material herald its numerous applications. As one example, the use of the Cu2-xSe nanowire bundles as a photoluminescence-type sensor of humidity is demonstrated, which shows a good sensitivity, ideal linearity, quick response/recovery and long lifetime in a very wide humidity range at room temperature.