Optimization of laser deposited silver nanoparticle substrates for surface-enhanced raman spectroscopy.

Optimization of laser deposited silver nanoparticle substrates for surface-enhanced raman spectroscopy.
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DOI:
10.1088/1361-6528/ac622e
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发表时间:
2022-05-13
期刊:
影响因子:
3.5
通讯作者:
--
中科院分区:
材料科学3区
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近年来,为表面增强拉曼光谱(Sers)制造灵敏且可再现的基底一直是一个挑战。虽然Sers提供了优于传统拉曼光谱的显著优点,但某些障碍限制了它们的商业用途,特别是在需要低检测限的环境中。我们研究了各种激光沉积的银微结构的Sers基板与不同的形态作为一种手段,以优化分析物检测。我们发现,使用405 nm激光从2 mM硝酸银和柠檬酸钠溶液中存款银纳米颗粒(AgNO3)的线不仅提供了最好的增强,而且提供了最一致和可再现的基底。我们还发现,激光沉积的概率是波长依赖性的,较长的波长比较短的波长更不可能存款。这项工作提供了一个更好的理解激光沉积过程,以及基板的形状和结构如何影响Sers信号。
Creating sensitive and reproducible substrates for surface-enhanced Raman spectroscopy (SERS) has been a challenge in recent years. While SERS offers significant benefits over traditional Raman spectroscopy, certain hindrances have limited their commercial use, especially in settings where low limits of detection are necessary. We studied a variety of laser-deposited silver microstructured SERS substrates with different morphology as a means to optimize analyte detection. We found that using a 405 nm laser to deposit lines of silver nanoparticles (AgNPS) from a 2 mM silver nitrate and sodium citrate solution offered not only the best enhancement, but also the most consistent and reproducible substrates. We also found that the probability of deposition by laser was wavelength dependent and that longer wavelengths were less likely to deposit than shorter wavelengths. This work offers a better understanding of the laser deposition process as well as how substrate shape and structure effect SERS signals.
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