...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Sensors and Actuators >Modification-free colorimetric and visual detection of Hg~(2+) based on the etching from core-shell structural Au-Ag nanorods to nanorices
【24h】

Modification-free colorimetric and visual detection of Hg~(2+) based on the etching from core-shell structural Au-Ag nanorods to nanorices

机译：基于从核-壳结构金-银纳米棒到纳米粒子的蚀刻，对Hg〜（2+）进行无修饰的比色和视觉检测

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A simple and rapid colorimetric approach for Hg2+detection is achieved by etching silver-coated gold nanobipyramids (Au NBs@Ag nanoparticles) based on the redox reaction between Hg2+and silver nanoshell of the Au NBs@Ag nanoparticles. The decrease of the silver nanoshell thickness leads to first blue shift and then red shift of the longitudinal localized surface plasmon resonance (LSPR) peak and accompanies a vivid color change. The blue shift is more suitable for colorimetric detection which has the obvious multicolor change from yellow-green to green and then to blue-gray; and could be employed to quantitatively detect the concentrations of Hg2+. This nanoprobe with the longitudinal LSPR peak at 730 nm exhibits a linear range of 0.1–20 μM with a limit of detection (LOD) of 22 nM based on blue shift and has the most obvious color change with the lowest LOD of 0.8 μM by direct observation. In this case, the Au NBs@Ag nanoparticles are gradually etched from the nanorods to nanorices as the Hg2+concentration increases. Compared with other techniques, this method could avoid tedious procedures and is time-saving. Furthermore, this nanoprobe has good selectivity, and is well demonstrated in real samples with satisfied results.
机译：一种基于Hg2 +和Au NBs @ Ag纳米粒子的银纳米壳之间的氧化还原反应，通过蚀刻镀银的金纳米双金字塔（Au NBs @ Ag纳米粒子），实现了一种简单，快速的比色法检测Hg2 +。银纳米壳厚度的减小导致纵向局部表面等离振子共振（LSPR）峰先发生蓝移，然后发生红移，并伴随生动的颜色变化。蓝移更适合于比色检测，比色检测具有从黄绿色到绿色然后到蓝灰色的明显多色变化；可用于定量检测Hg2 +的浓度。这种纳米探针的纵向LSPR峰位于730 nm，线性范围为0.1–20μM，基于蓝移，检测限（LOD）为22 nM，通过直接检测，颜色变化最为明显，最低LOD为0.8μM。观察。在这种情况下，随着Hg2 +浓度的增加，Au NBs @ Ag纳米颗粒逐渐从纳米棒腐蚀成纳米颗粒。与其他技术相比，该方法可以避免繁琐的过程，并且节省时间。此外，这种纳米探针具有良好的选择性，并且在真实样品中得到了充分证明，并获得了满意的结果。

著录项

  • 来源
    《Sensors and Actuators》 |2018年第8期|181-190|共10页
  • 作者

    Ying Qi; Jing Zhao; Guojun Weng; Jianjun Li; Jian Zhu; Junwu Zhao;

  • 作者单位

    The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University;

    The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University;

    The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University;

    The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University;

    The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University;

    The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University;

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

    Colorimetric sensing; Gold nanobipyramids; Localized surface plasmon resonance (LSPR); Hg2+; Etching; Au-Ag core-shell nanorices;

    机译：比色传感;金纳米双锥体;局部表面等离子体共振（LSPR）;Hg2 +;蚀刻;Au-Ag核壳纳米粒子;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号