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通过in-situ自我减少方法构建高分散的固COF,以实现对莱特的敏感SERS检测

Panjie Li¹, Jiaxin Chen², Yalin Xie²

¹School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu, 611730, PR China.

|August 26, 2025

概括

这项研究引入了一种新的富含硫的共价有机框架 (COF),与金纳米粒子相结合,用于增强的表面增强拉曼光谱 (SERS). 在现场合成方法显著提高了SERS传感器的灵敏度和分子检测的可重复性.

科学领域:

材料科学
纳米技术
分析化学

背景情况:

表面增强拉曼光谱 (SERS) 需要具有电磁场放大和分析剂丰富的基板.
使用金属纳米粒子 (NP) 的传统SERS基板面临不稳定性和可重复性差等挑战.
共价有机框架 (COF) 提供可设计的孔隙性和稳定性,使其对SERS应用具有前景.

研究的目的:

通过将金纳米粒子 (Au NPs) 与富含硫的共价有机框架 (COF) 集成来开发一种新的SERS基板.
研究一种现场合成方法来制造COF/Au复合材料,克服传统方法的局限性.
评估用于分子检测的复合材料的SERS性能,灵敏度和可重复性.

主要方法:

合成了富含硫的COF,并探索了AU NP整合的三种方法:化学降解,物理吸附和现场降解.
使用Au-S软酸相互作用在COF矩阵内将Au3+降低为Au0.
系统地比较三种合成方法,以确定SERS增强的最佳方法.

主要成果:

与其他方法相比,现场减少方法产生了具有大面积和高密度NP的COF/Au复合材料,显示出优异的SERS增强和可重复性.
优化的COF/Au复合物使得莱特的超敏感检测率降至6.07×10−8g/ml.
基板利用固有的COF拉曼峰值进行内部校准,增强抗干扰能力.

结论:

开发了COF/Au SERS基材的现场合成创新策略,克服了传统方法的局限性.
拟议的COF/Au复合物对SERS应用具有出色的灵敏性,可重复性和抗干扰性.
这项工作为下一代SERS传感器提供了一个有前途的平台,

关键词:

共价有机框架在现场自降莱特表面增强的拉曼光谱

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