31317294Raman spectroscopyPT2026-03-30 20:25:27UF31317295spectroscopy, RamanNDBT31304411spectroscopyPTNT31341349micro-Raman spectroscopyPTNT31341355surface enhanced Raman spectroscopyPTNT31341359Fourier transform Raman spectroscopyPTNT31341363spatially offset Raman spectroscopyPT