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A highly sensitive gas-sensing platform based on a metal-oxide nanowire forest grown on a suspended carbon nanowire fabricated at a wafer level

机译:基于金属氧化物纳米线森林的高度灵敏的气体传感平台,该森林生长在以晶圆级制造的悬浮碳纳米线上

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摘要

This paper presents a highly sensitive gas-sensing platform based on a ZnO nanowire (NW) forest circumferentially grown on a suspended single glassy carbon NW. The fabrication was carried out at a wafer level using only batch fabrication processes including carbon-microelectromechanical systems and the hydrothermal method. The suspended architecture and relatively high elastic modulus of the carbon nanowires facilitates selective functionalization on the suspended NW. The circumferentially distributed NW arrangement enhances the accessibility of gas molecule to the ZnO-NW sensing sites, thus facilitating highly sensitive gas sensing. The suspended architecture also enhances efficient mass transfer from the bulk. This novel suspended three-dimensional (3D) NW-based sensor configuration allows better NO2gas sensing capabilities in terms of the limit of detection (9.45 ppb, S/N = 3), sensitivity (0.393 ppb−1), and linear sensing range (50–300 ppb) compared to the same type of ZnO-NW-based gas sensor fabricated in contact with the substrate.
机译:本文提出了一种基于高度敏感的气体传感平台,该平台基于在单个玻璃状碳纳米线的悬浮状态下周向生长的ZnO纳米线(NW)森林。仅使用包括碳微电子机械系统和水热法在内的分批制造工艺在晶片级进行了制造。碳纳米线的悬浮结构和相对较高的弹性模量有助于在悬浮NW上进行选择性功能化。沿周向分布的NW布置增强了气体分子对ZnO-NW传感部位的可及性,从而促进了高灵敏度的气体传感。悬挂式结构还增强了从主体的有效质量传递。这种基于NW的新型悬浮式三维(3D)传感器配置在检测限(9.45 ppb,S / N = 3),灵敏度(0.393 ppb-1)和线性检测范围( 50-300 ppb),而与基板接触制造的相同类型的基于ZnO-NW的气体传感器相比。

著录项

  • 来源
    《Sensors and Actuators》 |2018年第5期|55-62|共8页
  • 作者单位

    School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST);

    Department of Mechanical engineering, Ulsan National Institute of Science and Technology (UNIST);

    School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST);

    School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST);

    Department of Mechanical engineering, Ulsan National Institute of Science and Technology (UNIST);

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Metal-oxide nanowire forest; Suspended architecture; Carbon nanowire; Gas sensor; Carbon-MEMS;

    机译:金属氧化物纳米线森林;悬浮架构;碳纳米线;气体传感器;碳微机电系统;

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