基于 PVDF/Au 纳米纤维的高灵敏 SERS 传感器,用于亚硝酸根离子的痕量分析

IF 2.6 3区 化学 Q2 CHEMISTRY, ANALYTICAL
Mei Sun, Xiaoyi Tang, Ke Chen, Hanmei Hu, Mingdi Yang, Haiou Zhou and Ping Chen
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引用次数: 0

摘要

亚硝酸根离子对环境和人类健康都有很大风险,因此需要精确灵敏的检测方法。在此,我们制作了一种基于 PVDF/Au 纳米纤维的高灵敏度 SERS 传感器,用于亚硝酸根离子的检测。PVDF 纳米纤维的合成需要使用电纺丝设备,而 SERS 活性 "热点 "的均匀性和高密度则是通过在 PVDF 表面直接涂覆等离子体金纳米粒子的热蒸发法实现的。通过热蒸发,在 PVDF 纳米纤维表面直接生成了高效的界面偶极层电荷转移。金纳米粒子的局部表面等离子共振与 PVDF 的光电和压电特性共同作用,增强了拉曼响应。值得注意的是,所制备的 SERS 基底对罗丹明 6G 具有很高的灵敏度,其增强因子为 9.4 × 107,检测范围从 10-6  10-11 M。此外,用对氨基苯硫酚(PATP)功能化的 PVDF/Au 膜能有效捕获浓度低至 10-8 M 的 NO2-离子,并成功检测了河水样品中的 NO2-。此外,该 SERS 底物具有良好的重复性和稳定性,可应用于食品检测和医疗诊断中的痕量检测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A highly sensitive SERS sensor based on PVDF/Au nanofibers for trace analysis of nitrite ions†

A highly sensitive SERS sensor based on PVDF/Au nanofibers for trace analysis of nitrite ions†

Nitrite ions present a significant risk to both environmental and human health, necessitating precise and sensitive detection methods. Herein, we fabricated a highly sensitive SERS sensor based on PVDF/Au nanofibers for nitrite ion detection. The synthesis of PVDF nanofibers involved the utilization of electrospinning apparatus, while the uniformity and high density of SERS activity “hot spots” were achieved by directly coating plasma gold nanoparticles onto the PVDF surface adopting thermal evaporation. The efficient charge transfer of the interface dipole layer directly generated on the surface of PVDF nanofibers was achieved through thermal evaporation. The enhanced Raman responses were due to the combined effects of local surface plasmon resonance of Au nanoparticles and photoelectric and piezoelectric properties of PVDF. It is noteworthy that the prepared SERS substrate exhibited high sensitivity towards rhodamine 6G, boasting an enhancement factor of 9.4 × 107 and a detection limit spanning from 10−6–10−11 M. Furthermore, the PVDF/Au membrane functionalized with p-aminothiophenol (PATP) effectively captured NO2 ions at concentrations as low as 10−8 M and successfully detected NO2 in river water samples. Additionally, the SERS substrate has good repeatability and stability, and can be applied to trace detection in food safety and medical diagnosis.

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来源期刊
Analytical Methods
Analytical Methods CHEMISTRY, ANALYTICAL-FOOD SCIENCE & TECHNOLOGY
CiteScore
5.10
自引率
3.20%
发文量
569
审稿时长
1.8 months
期刊介绍: Early applied demonstrations of new analytical methods with clear societal impact
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