Fig. 2: CD and Raman scattering spectra of plasmonic complexes with different chiral molecules.
From: Charge transfer at the plasmon-molecule interfaces controls the collective chiroptical responses
a–c Schematic structures of Complex1-3 that has chiral molecules BDP1-3 on the AuNP’s surfaces, respectively. The surface charges and dipole plasmons of AuNPs are depicted. d–f CD spectra of Complex1-3 with different concentrations of chiral molecules. Complex1-2 and their AuNP controls both in aqueous solution, Complex3 and its AuNP control both in DMF. The AuNPs and the chiral molecules are incubated overnight for sample preparation. g–i Time-dependent changes in the CD spectra after mixing the chiral molecules and the AuNPs. The molecular concentrations are 1.4 μM in (g, h), and 12.8 μM in (i). The concentrations of AuNPs (3 nm) are ~600 nM in (g, h), and ~270 nM in (i). j–l SERS spectra of Complex1-2 in aqueous solution and Complex3 in DMF, under 532 or 633 nm laser excitation. The diameter of AuNPs is 3 nm. The samples in (d–f) and (j–l) were incubated overnight.
