Raman spectroscopy is an important vibrational spectroscopy tool to characterize chemical compounds. As only a few photons undergo Raman scattering, enhancement of signal is a vital requirement. In this laboratory experiment, some practical aspects of Raman spectroscopy and how a simple enhancement procedure can be used to detect a Raman signal has been described. An acid etching procedure has been used to create a surface-enhanced Raman scattering (SERS) substrate, and its effectiveness has been demonstrated with successful detection of the parts per million level of methylene blue. This work is relevant to upper-level undergraduate or graduate-level laboratory course preparation as the procedure is simple enough to be easily reproducible in a typical chemistry laboratory.

中文翻译：

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化学蚀刻铜表面上的表面增强拉曼散射：上层光谱测量和分析

拉曼光谱法是表征化合物特征的重要振动光谱法工具。由于只有几个光子经历拉曼散射，因此信号增强是至关重要的要求。在这个实验室实验中，已经描述了拉曼光谱学的一些实际方面，以及如何使用简单的增强程序检测拉曼信号。酸蚀刻程序已用于创建表面增强拉曼散射（SERS）基板，并且通过成功检测百万分之几的亚甲基蓝水平已证明了其有效性。这项工作与高年级本科生或研究生实验室课程的准备有关，因为该程序非常简单，可以在典型的化学实验室中轻松重现。