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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Probing the highly efficient room temperature ammonia gas sensing properties of a luminescent ZnO nanowire array prepared via an AAO-assisted template route
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Probing the highly efficient room temperature ammonia gas sensing properties of a luminescent ZnO nanowire array prepared via an AAO-assisted template route

机译：探索通过AAO辅助模板路线制备的发光ZnO纳米线阵列的高效室温氨气感测特性

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摘要

Here, we report the facile synthesis of a highly ordered luminescent ZnO nanowire array using a low temperature anodic aluminium oxide (AAO) template route which can be economically produced in large scale quantity. The as-synthesized nanowires have diameters ranging from 60 to 70 nm and length ～11 μm. The photoluminescence spectrum reveals that the AAO/ZnO assembly has a strong green emission peak at 490 nm upon excitation at a wavelength of 406 nm. Furthermore, the ZnO nanowire array-based gas sensor has been fabricated by a simple micromechanical technique and its NH3 gas sensing properties have been explored thoroughly. The fabricated gas sensor exhibits excellent sensitivity and fast response to NH_3 gas at room temperature. Moreover, for 50 ppm NH_3 concentration, the observed value of sensitivity is around 68%, while the response and recovery times are 28 and 29 seconds, respectively. The present synthesis technique to produce a highly ordered ZnO nanowire array and a fabricated gas sensor has great potential to push the low cost gas sensing nanotechnology.
机译：在这里，我们报告使用低温阳极氧化铝（AAO）模板路线轻松合成高度有序的发光ZnO纳米线阵列，可以经济地大量生产。合成后的纳米线的直径范围为60至70 nm，长度约为11μm。光致发光光谱表明，AAO / ZnO组件在406 nm波长激发时在490 nm处具有很强的绿色发射峰。此外，通过简单的微机械技术制造了基于ZnO纳米线阵列的气体传感器，并对其NH3气体传感特性进行了深入研究。制成的气体传感器在室温下具有出色的灵敏度和对NH_3气体的快速响应。此外，对于50 ppm NH_3浓度，观察到的灵敏度值为68％左右，而响应时间和恢复时间分别为28秒和29秒。用于生产高度有序的ZnO纳米线阵列和制造的气体传感器的本合成技术具有推动低成本气体传感纳米技术的巨大潜力。

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