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首页> 外文期刊>RSC Advances >Highly sensitive pH dependent acetone sensor based on ultrananocrystalline diamond materials at room temperature
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Highly sensitive pH dependent acetone sensor based on ultrananocrystalline diamond materials at room temperature

机译：高敏感性pH依赖性丙酮传感器，基于室温的超晶金刚石材料

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摘要

Diamond-based materials often considered inappropriate for sensor device applications, however these robust materials exhibit unpredictable electrochemical sensing properties. Herein, we report a high-performance novel acetone sensor based on diamond materials such as nanocrystalline diamond (NCD) films and ultrananocrystalline diamond (UNCD) films. A new approach has been undertaken for the selective detection of liquid acetone in water using an extended gate field effect transistor (EGFET), since these two liquids are miscible with a pH value of 7. Systematic studies revealed that ultra-high acetone sensing properties were observed from the UNCD based sensor. A higher proportion of grain boundaries exists in the UNCD film with the presence of graphitic phase (sp(2) content) built conduction paths for electron transportation, as revealed by tunneling electron microscopy (TEM). The excellent sensing behavior of these UNCD based sensors was achieved owing to the reduction of the diamond-to-Si interfacial resistance, which increased the conductivity as analyzed by electrochemical impedance spectroscopy (EIS) investigations. Thus the electrical conductivity of UNCD material shows an enhanced stability and reproducibility towards acetone.
机译：基于钻石的材料通常认为不适合传感器装置应用，然而这些稳健的材料表现出不可预测的电化学传感特性。在此，我们报告了基于金刚石材料的高性能新型丙酮传感器，例如纳米晶金刚石（NCD）膜和超晶金刚石（UNCED）薄膜。使用延长的栅极场效应晶体管（EGFET）选择一种新的方法，用于选择性地检测水中的液体丙酮，因为这两个液体与pH值的混溶性为7.系统的研究表明，超高丙酮感应性质从基于UNC的传感器观察到。在没有石墨相（SP（2）含量）的情况下，在没有隧道电子显微镜（TEM）的透露，在没有石墨相（SP（2）含量）的导通路径中，存在较高比例的晶界。由于金刚石对Si界面抗性的降低来实现这些基于基于基于的传感器的优异感测行为，这增加了通过电化学阻抗光谱（EIS）研究的分析的导电性。因此，UNC的电导率显示出增强的稳定性和对丙酮的再现性。

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  • 来源
    《RSC Advances》 |2016年第105期|共10页
  • 作者

    Kathiravan Deepa; Huang Bohr-Ran; Saravanan Adhimoorthy; Keiser Gerd; Yeh Chien-Jui; Leou Keh-Chyang; Lin I-Nan;

  • 作者单位

    Natl Taiwan Univ Sci &

    Technol Dept Elect &

    Comp Engn Grad Inst Elect Opt Engn Taipei 106 Taiwan;

    Natl Taiwan Univ Sci &

    Technol Dept Elect &

    Comp Engn Grad Inst Elect Opt Engn Taipei 106 Taiwan;

    Natl Taiwan Univ Sci &

    Technol Dept Elect &

    Comp Engn Grad Inst Elect Opt Engn Taipei 106 Taiwan;

    Boston Univ Dept Elect &

    Comp Engn Boston MA 02215 USA;

    Natl Tsing Hua Univ Dept Engn &

    Syst Sci Hsinchu 300 Taiwan;

    Natl Tsing Hua Univ Dept Engn &

    Syst Sci Hsinchu 300 Taiwan;

    Tamkang Univ Dept Phys Tamsui 251 Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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