Figure 2.

(A, A′) TEM images of Cu⁰–AuNPs (panel A) and L1@Cu²⁺–AuNPs (panel A′). (B) Normalized UV–vis absorption and scale bars: 50 and 20 nm for Cu–AuNPs and 0.2 μm and 100 nm for L1@Cu²⁺–AuNPs and CuCl₂·6H₂O as control. (C) Raman spectra of Cu–AuNPs and L1@Cu²⁺–AuNPs products compared to free L1 and CuCl₂·6H₂O as control. Raman spectra. Experimental conditions: λ_exc = 785 nm; laser power 20 mW; accumulation time 180 s.