Figure 1.

Room-temperature PL spectra of NPs in hexane. Si (A), Si-C₁₈H₃₇ (B), C (C), C-C₁₈H₃₇ (D) NPs in hexane collected for an excitation of the solution volume in the bottom and in the center. The spectra in (B) and (D) were vertically stacked for clearness. The insets in (B) and (D) show, respectively, red PL of Si-C₁₈H₃₇ and orange PL of C-C₁₈H₃₇ NPs. Excitation energy is 2.54 eV.