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首页> 外文期刊>Journal of nano research >A Novel Near-Infrared Fluorescence Sensor for H2O2 Based on N-Acetyl-L-Cysteine-Capped Gold Nanoparticles
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A Novel Near-Infrared Fluorescence Sensor for H2O2 Based on N-Acetyl-L-Cysteine-Capped Gold Nanoparticles

机译：基于N-乙酰基-L-半胱氨酸封端的金纳米粒子的新型H2O2近红外荧光传感器

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摘要

A novel near-infrared fluorescence quenching method has been developed for the determination of hydrogen peroxide based on N-acetyl-L-cysteine-capped gold nanoparticles (NAC-AuNPs) as a fluorescence probe. The prepared gold nanoparticles with the size of about 1.91 nm exhibited strong near-infrared fluorescence emission at 693 nm with excitation wavelength at 450 nm in aqueous solution. The fluorescence intensity of NAC-AuNPs was quenched dramatically by adding hydrogen peroxide. Therefore, it could be used to detect hydrogen peroxide based on the fluorescence quenching intensity was linear with the concentration of hydrogen peroxide. Under the optimal experimental conditions, the linear range and detection limit were 1.0x10(-6) - 3.0x10(-2) mol/L and 1.0x10(-7) mol/L, respectively. The possible quenching mechanism was investigated by time-resolved fluorescence spectroscopy. The proposed method was simple, sensitive and showed good repeatability and stability.
机译：基于N-乙酰基-L-半胱氨酸加帽的金纳米颗粒（NAC-AuNPs）作为荧光探针，已经开发了一种新型的近红外荧光猝灭法测定过氧化氢。所制备的尺寸为约1.91nm的金纳米颗粒在水溶液中在693nm处具有强的近红外荧光发射，在450nm处具有激发波长。通过添加过氧化氢，NAC-AuNPs的荧光强度显着淬灭。因此，基于荧光猝灭强度与过氧化氢浓度呈线性关系，可用于检测过氧化氢。在最佳实验条件下，线性范围和检出限分别为1.0x10（-6）-3.0x10（-2）mol / L和1.0x10（-7）mol / L。通过时间分辨荧光光谱研究了可能的淬灭机理。所提出的方法简单，灵敏，并且具有良好的重复性和稳定性。

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  • 来源
    《Journal of nano research》 |2017年第2017期|234-240|共7页
  • 作者

    Dong Wenjuan; Han Jiyan; Wu Xin; Fan Li; Liang Wenting;

  • 作者单位

    Shanxi Univ, Coll Chem & Chem Engn, Inst Enviromental Sci, Taiyuan 030006, Peoples R China;

    Shanxi Univ, Coll Chem & Chem Engn, Inst Enviromental Sci, Taiyuan 030006, Peoples R China;

    Shanxi Univ, Coll Chem & Chem Engn, Inst Enviromental Sci, Taiyuan 030006, Peoples R China;

    Shanxi Univ, Coll Chem & Chem Engn, Inst Enviromental Sci, Taiyuan 030006, Peoples R China;

    Shanxi Univ, Coll Chem & Chem Engn, Inst Enviromental Sci, Taiyuan 030006, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Gold nanoparticles; Near-infrared fluorescence; H2O2;

    机译：金纳米粒子;近红外荧光;H2O2;

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