Table 1. The relative molar ratio of ligands (oleic acid, dodecanethiol, and NS-BP) attached to the surface of CuInS2/ZnS quantum dots before and after the partial ligand-exchange step. Estimation was done based on the areal ratio of peaks corresponding to each ligands in the NMR spectra
mol% | Oleic acid | Dodecanethiol | NS-BP |
Before exchange | 17.9 | 82.1 | - |
After exchange | 13.5 | 81.1 | 5.4 |