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Electrospun tailored ZnO nanostructures - role of chloride ions

机译：ElectromeOn定制ZnO纳米结构 - 氯离子的作用

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摘要

A novel way of transforming ZnO nanospheres to nanorods using an electrospinning technique has been identified as a simple method to control the growth of nanostructures. In this work, ZnO nanospheres and pencil like nanorods were successfully grown using an electrospinning technique with a precursor solution containing polyvinyl alcohol (PVA) and zinc acetate in the desired weight ratio. Also, to control the growth of ZnO nanostructures, chloride ions were used as a capping agent. The X-ray diffraction (XRD) pattern confirmed the influence of chloride ion concentration on the growth of ZnO nanostructures. Field emission scanning electron micrographs (FE-SEM) of as-deposited samples showed the formation of uniform and defect free ZnO-PVA composite nanofibers and the calcined samples revealed the growth of nanospherical and pencil like nanorod shaped ZnO. The growth mechanism, electrical characteristics as well as the room temperature ethanol sensing characteristics of the calcined ZnO nanostructures were investigated. The influence of morphology, grain and grain boundary resistances, activation energy of ZnO nanostructures and dissociation bond energy of ethanol molecules on the receptor and transduction functions of ZnO sensing elements has been discussed.
机译：使用静电纺丝技术将ZnO纳米球转化为纳米棒的新方法被鉴定为控制纳米结构生长的简单方法。在这项工作中，使用含有含有聚乙烯醇（PVA）的前体溶液和乙酸锌以所需的重量比成功生长ZnO纳米球和铅笔如纳米棒。而且，为了控制ZnO纳米结构的生长，氯离子被用作封端剂。 X射线衍射（XRD）模式证实了氯离子浓度对ZnO纳米结构生长的影响。沉积样品的场发射扫描电子显微照片（Fe-SEM）显示出均匀和缺陷的ZnO-PVA复合纳米纤维的形成，并且煅烧样品揭示了纳米球和铅笔如纳米棒形ZnO的生长。研究了煅烧ZnO纳米结构的生长机理，电学特性以及室温乙醇感测特性。探讨了形态学，谷物和晶界电阻，ZnO纳米结构的激活能量和乙醇分子的解离能量对ZnO感测元件的转导功能的影响。

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  • 来源
    《RSC Advances》 |2015年第104期|共10页
  • 作者

    Shankar Prabakaran; Rayappan John Bosco Balaguru;

  • 作者单位

    SASTRA Univ Sch Elect &

    Elect Engn Nanosensors Lab Ctr Nanotechnol &

    Adv Biomat CeNTAB Thanjavur 613401 India;

    SASTRA Univ Sch Elect &

    Elect Engn Nanosensors Lab Ctr Nanotechnol &

    Adv Biomat CeNTAB Thanjavur 613401 India;

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  • 正文语种 eng
  • 中图分类 化学;
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