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Coherent anti-stokes Raman scattering spectroscopy (CARS) and imaging of DNA on graphene layers and glass covers
FlatChem  (IF5.227),  Pub Date : 2021-03-19, DOI: 10.1016/j.flatc.2021.100243
Galyna Dovbeshko, Olena Gnatyuk, Andrej Dementjev, Danielis Rutkauskas, Evgeniya Kovalska, Anna Baldycheva, Oleksii Ilchenko, Dmytro Krasnenkov, Tommi Kaplas

We report a comparative study of the Raman and Coherent anti-Stokes Raman scattering (CARS) patterns of DNA molecules deposited on graphene or glass substrates. In the DNA CARS spectra, the positions of vibrational resonances are red-shifted by 10–20 cm−1 and have new features in high-frequency region in comparison with spontaneous Raman data. We demonstrate that CARS imaging can be employed for the visualization and characterization of DNA molecules deposited on graphene.