Plasmonically-enhanced Fe(II) Coordination Complexes Allow SERS Readout of Spin State Switching Below the Optical Diffraction Limit

Key Points

• The main aim is to develop effective methods for monitoring spin crossover phenomena at the nanoscale using plasmonically-enhanced coordination complexes.
• Developed plasmonically-enhanced Fe(II) coordination complexes
• Utilized surface-enhanced Raman scattering (SERS) for detection
• Investigated spin state switching below the optical diffraction limit
• Demonstrated successful SERS readout of spin state transitions
• Achieved monitoring capabilities below the optical diffraction limit
• Enhanced sensitivity for spin crossover materials was observed