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首页> 外文期刊>Journal of materials science >Fabrication of a highly flexible low-cost H_2 gas sensor using ZnO nanorods grown on an ultra-thin nylon substrate
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Fabrication of a highly flexible low-cost H_2 gas sensor using ZnO nanorods grown on an ultra-thin nylon substrate

机译：使用在超薄尼龙基板上生长的ZnO纳米棒制造高度灵活的低成本H_2气体传感器

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摘要

A "highly flexible low-cost" H_2 gas sensor was fabricated via inclined and vertically well-aligned ZnO nanorods on a "cheap, thin (15 μm), and highly flexible" nylon substrate using the hydrothermal method. Morphological, crystallinity, and optical properties of the prepared ZnO nanorods were studied by field emission scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray analysis, X-ray diffraction, and photoluminescence measurements. Results revealed the formation of aligned hexagonal-like nanorods with high aspect ratio and density. The results confirmed the formation of wuertzite ZnO phase with a preferred orientation along the (002) direction with high crystallinity, excellent quality, and few defects. The sensitivity and response time behaviors of the ZnO-based gas sensor to hydrogen gas at different operation temperatures and in various hydrogen concentrations were investigated. Under 500 ppm of H_2 exposure at different temperatures from room temperature to 180 ℃, the sensitivity increased from 109 to 264 %. When the exposed H_2 gas increased from 750 to 2000 ppm at a fixed temperature of 75 ℃, the sensitivity also sharply increased from 246 to 578 %. Moreover, both the response and recovery time of the device during both tests were enhanced. The hydrogen gas sensing mechanisms of ZnO nanorods in low and high operation temperatures were discussed.
机译：使用水热法，通过在“便宜，薄（15μm），高柔性”的尼龙基板上，通过倾斜且垂直排列良好的ZnO纳米棒，制造了“高度柔性，低成本”的H_2气体传感器。通过场发射扫描电子显微镜，透射电子显微镜，能量色散X射线分析，X射线衍射和光致发光测量研究了制备的ZnO纳米棒的形貌，结晶度和光学性质。结果表明，具有高的长宽比和密度的对齐的六角形纳米棒的形成。结果证实形成了具有沿（002）方向的优选取向的纤锌矿ZnO相，其具有高结晶度，优异的品质并且几乎没有缺陷。研究了基于ZnO的气体传感器在不同工作温度和不同氢气浓度下对氢气的灵敏度和响应时间行为。在从室温到180℃的不同温度下暴露500 ppm的H_2下，灵敏度从109％上升到264％。当暴露的H_2气体在75℃的固定温度下从750 ppm增加到2000 ppm时，灵敏度也从246％急剧增加到578％。此外，两次测试期间设备的响应时间和恢复时间都得到了提高。讨论了ZnO纳米棒在低和高工作温度下的氢气传感机理。

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  • 来源
    《Journal of materials science》 |2016年第9期|9461-9469|共9页
  • 作者

    Sabah M. Mohammad; Z. Hassan; Rawnaq A. Talib; Naser M. Ahmed; Mohammed A. Al-Azawi; Nabeel M. Abd-Alghafour; C. W. Chin; N. H. Al-Hardan;

  • 作者单位

    Nano Optoelectronics Research and Technology (NOR), School of Physics, Universiti Sains Malaysia, 11800 Gelugor, Penang, Malaysia;

    Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, USM 11800, Penang, Malaysia;

    Nano Optoelectronics Research and Technology (NOR), School of Physics, Universiti Sains Malaysia, 11800 Gelugor, Penang, Malaysia,Polymer Research Center, University of Basra, Basra, Iraq;

    Nano Optoelectronics Research and Technology (NOR), School of Physics, Universiti Sains Malaysia, 11800 Gelugor, Penang, Malaysia;

    Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Johor, Malaysia;

    Nano Optoelectronics Research and Technology (NOR), School of Physics, Universiti Sains Malaysia, 11800 Gelugor, Penang, Malaysia;

    Nano Optoelectronics Research and Technology (NOR), School of Physics, Universiti Sains Malaysia, 11800 Gelugor, Penang, Malaysia;

    Faculty of Science and Technology, School of Physics, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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