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Rapid and high‐precision quantitative analysis based on substrate rotation‐enhanced Raman scattering effect
Journal of Raman Spectroscopy ( IF 2.4 ) Pub Date : 2020-05-28 , DOI: 10.1002/jrs.5902 Shupeng Liu 1 , Zehai Hou 1 , Xiang Bao 1 , Xuetao Wang 1 , Heng Zhang 1 , Taihao Li 2 , Fufei Pang 1 , Zhenyi Chen 1 , Tingyun Wang 1 , Na Chen 1
Journal of Raman Spectroscopy ( IF 2.4 ) Pub Date : 2020-05-28 , DOI: 10.1002/jrs.5902 Shupeng Liu 1 , Zehai Hou 1 , Xiang Bao 1 , Xuetao Wang 1 , Heng Zhang 1 , Taihao Li 2 , Fufei Pang 1 , Zhenyi Chen 1 , Tingyun Wang 1 , Na Chen 1
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In this paper, we proposed a substrate rotation‐enhanced Raman scattering (SRERS) effect. The substrate, prepared by the technology of texturization and electroplating, is fixed on the motor and rotates with it while collecting Raman signal. The relative standard deviation (RSD) of Raman intensity in multiple measurements is less than 9.1%, which indicates that the Raman signal is stable and reproducible based on the SRERS effect. What is more, this method eliminates the fluctuation of the local electric field intensity caused by the inhomogeneity of the substrate and makes the “equivalent hot spots” distributed uniformly on the whole surface. The quantitative analysis with the Rhodamine 6G (R6G) and the lipid‐soluble drug Oxaprozin (OXA) as the probe respectively has demonstrated that the Raman intensity of R6G at 612 cm−1 with respect to concentration tend to linear ranging from 10−10 to 10−8 mol/L with the correlation coefficient (R2) is more than 0.96, and the Raman intensity of OXA at 1,003 cm−1 with respect to concentration tend to linear ranging from 3.4 * 10−6 to 3.4 * 10−4 mol/L (prepared with 50% v/v ethanol) with the correlation coefficient (R2) is more than 0.97. The mechanism of SRERS is given, and the theory analysis indicates that the Raman signal obtained is the mean of a large number of laser‐scanning points' contributions.
中文翻译：
基于底物旋转增强拉曼散射效应的快速高精度定量分析
在本文中，我们提出了底物旋转增强拉曼散射（SRERS）效应。通过纹理化和电镀技术制备的基板固定在电机上并随其旋转，同时收集拉曼信号。多次测量中拉曼强度的相对标准偏差（RSD）小于9.1％，这表明基于SRERS效应，拉曼信号稳定且可重现。而且，该方法消除了由基板的不均匀性引起的局部电场强度的波动，并使“等效热点”均匀地分布在整个表面上。用若丹明6G（R6G）和脂溶性药物Oxaprozin（OXA）作为探针的定量分析表明，R6G在612 cm处的拉曼强度相对于浓度的-1趋于线性范围为10 -10至10 -8 mol / L，且相关系数（R 2）大于0.96，并且相对于浓度的OXA在1,003 cm -1的拉曼强度趋于线性范围为3.4 * 10 -6至3.4 * 10 -4 mol / L（用50％v / v乙醇制备），相关系数（R 2）大于0.97。给出了SRERS的机理，理论分析表明所获得的拉曼信号是大量激光扫描点贡献的平均值。
更新日期：2020-05-28
中文翻译：
基于底物旋转增强拉曼散射效应的快速高精度定量分析
在本文中，我们提出了底物旋转增强拉曼散射（SRERS）效应。通过纹理化和电镀技术制备的基板固定在电机上并随其旋转，同时收集拉曼信号。多次测量中拉曼强度的相对标准偏差（RSD）小于9.1％，这表明基于SRERS效应，拉曼信号稳定且可重现。而且，该方法消除了由基板的不均匀性引起的局部电场强度的波动，并使“等效热点”均匀地分布在整个表面上。用若丹明6G（R6G）和脂溶性药物Oxaprozin（OXA）作为探针的定量分析表明，R6G在612 cm处的拉曼强度相对于浓度的-1趋于线性范围为10 -10至10 -8 mol / L，且相关系数（R 2）大于0.96，并且相对于浓度的OXA在1,003 cm -1的拉曼强度趋于线性范围为3.4 * 10 -6至3.4 * 10 -4 mol / L（用50％v / v乙醇制备），相关系数（R 2）大于0.97。给出了SRERS的机理，理论分析表明所获得的拉曼信号是大量激光扫描点贡献的平均值。
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