Enhanced Raman scattering on 2D vdW materials

Embargo Date
2026-01-28
OA Version
Citation
Abstract
Two-dimensional (2D) materials have emerged as promising candidates for surface-enhanced Raman scattering (SERS) applications, demonstrating unprecedented sensitivities in chemical sensing. Despite their potential, the enhancement mechanisms responsible for their performance are not yet fully understood. This dissertation focuses on systematically investigating the Raman enhancement effect on different 2D materials to gain a deeper understanding of the underlying mechanisms and interactions. A series of measurements demonstrate Raman enhancement on 2D materials is uniform and stable, with promising sensing capabilities. Excitation-wavelength dependent Raman measurements are applied to investigate the coupling mechanism in resonant excitons in Rhodamine 6G/SnS2. Finally, an optimization approach based on atomic defect engineering will be demonstrated to achieve sub-femtomolar level, 10-17 M, SERS sensitivity in Rh 6G/SnS2
Description
2023
License
Attribution 4.0 International