Recent progress and perspectives of gas sensors based on vertically oriented ZnO nanomaterials
Recent progress and perspectives of gas sensors based on vertically oriented ZnO nanomaterials
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DOI：
10.1016/j.cis.2019.05.006
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发表时间：
2019-08-01
影响因子：
15.6
通讯作者：
Salama, Khaled N.
中科院分区：
文献类型：
--
作者：
Ahmad, Rafiq;Majhi, Sanjit Manohar;Salama, Khaled N.
垂直取向的氧化锌（ZnO）纳米材料，如纳米棒（NR）、纳米线（NW）、纳米管（NT）、纳米针（NN）和纳米片（NS），是高度有序的结构，其为传感器提供显著的性质。此外，这些纳米结构具有迷人的功能，包括高表面积与体积比，高载流子浓度和许多表面活性位点。这些特性使得垂直取向的ZnO纳米材料成为气敏传感器的理想材料。用于生产垂直取向的纳米材料电极表面的有效方法的开发已经导致改进的稳定性、高再现性和气体传感性能。超越包括粘合剂和纳米材料沉积步骤的传统制造工艺是至关重要的，因为来自这些工艺的材料具有稳定性差、再现性低和边缘感测性能。在这篇专题文章中，我们全面描述了垂直取向的ZnO纳米材料的气敏应用。这种纳米材料的气体传感器制造的使用进行了讨论的背景下，易于生长，电极表面上的稳定性，生长的再现性，并提高设备的效率，由于其独特的和有利的功能。此外，我们总结了各种有毒和挥发性有机化合物（VOC）气体传感器的应用，我们讨论了垂直取向的ZnO纳米材料的未来发展方向。(C)2019 Elsevier B.V.版权所有。
Vertically oriented zinc oxide (ZnO) nanomaterials, such as nanorods (NRs), nanowires (NWs), nanotubes (NTs), nanoneedles (NNs), and nanosheets (NSs), are highly ordered architectures that provide remarkable properties for sensors. Furthermore, these nanostructures have fascinating features, including high surface-area-to-volume ratios, high charge carrier concentrations, and many surface-active sites. These features make vertically oriented ZnO nanomaterials exciting candidates for gas sensor fabrication. The development of efficient methods for the production of vertically oriented nanomaterial electrode surfaces has resulted in improved stability, high reproducibility, and gas sensing performance. Moving beyond conventional fabrication processes that include binders and nanomaterial deposition steps has been crucial, as the materials from these processes suffer from poor stability, low reproducibility, and marginal sensing performance. In this feature article, we comprehensively describe vertically oriented ZnO nanomaterials for gas sensing applications. The uses of such nanomaterials for gas sensor fabrication are discussed in the context of ease of growth, stability on an electrode surface, growth reproducibility, and enhancements in device efficiency as a result of their unique and advantageous features. In addition, we summarize applications of gas sensors for a variety of toxic and volatile organic compound (VOC) gases, and we discuss future directions of the vertically oriented ZnO nanomaterials. (C) 2019 Elsevier B.V. All rights reserved.