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Averaged and normalized SERS spectra of (a) leucocytes, (b) cervical carcinoma (HeLa), and (c) prostate cancer (PC3) cells recorded on polymer-based SERS platform. Experimental conditions: excitation at 785 nm, laser power at 1.5 mW, and 45 seconds integration time. Each SERS spectrum was obtained by averaging at least 25 single spectra from different places on the SERS substrate.
