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. 2019 Jun 25;9:9267. doi: 10.1038/s41598-019-45629-7

Figure 1.

Figure 1

Scheme of the preparation of SERS substrate, microfluidic system, analyte and measurement. Main steps involve cleaning (a), drying (b), sputtering of thin layer of silver (c), the process of preparing microfluidic system (d), analyte and buffer preparation followed by the separation of tumor cells (e) and finally the measurement takes place (f).