Atomic-Scale Doping of Rhenium on Ti3C2 MXene for Noble-Metal-Free Electromagnetic Enhancement and Ultrafast Charge Transfer Resonance.

Key Points

• This work aims to explore the effects of atomic-scale rhenium doping on Ti3C2 MXene for enhancing surface-enhanced Raman scattering (SERS).
• Investigated 1% rhenium doping by weight in Ti3C2 MXene.
• Analyzed SERS enhancement mechanisms through electromagnetic interactions and charge transfer.
• Utilized atomic-level engineering for performance tuning.
• Identified that as low as 1% rhenium doping significantly enhances SERS performance.
• Characterized the electromagnetic mechanism contributing to enhanced SERS.
• Set a foundation for future atomic-level modifications for optimizing MXenes.