Research / 2020 / Article / Fig 4

Research Article

Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals

Figure 4

Applicability of the ligand exchange strategy. (a, b) Ligand exchange of AuNSs to replace native TSC with CTAC: (a) -potentials of the AuNSs obtained at different stages of the ligand exchange and (b) TEM image of the CTAC-capped AuNSs. (c, d) Ligand exchange of AuNRs to replace native CTAB with OAm: (c) UV-vis-NIR spectra of the AuNRs with native CTAB, DEA, and OAm, respectively, and (d) TEM images of the AuNRs with the capping ligands of native CTAB (top) and OAm (bottom). The inset in (c) shows the photographs of, from left to right, CTAB-capped AuNRs in H2O, DEA-capped AuNRs in ethanol, and OAm-capped AuNRs in 1-octanol (bottom phase: H2O). (e, f) Ligand exchange of Pt nanocubes to replace native OAm with CTAC and TSC: (e) FTIR spectra of the Pt nanocubes with the capping ligands of OAm, CTAC, and TSC, respectively, and (f) TEM images of the Pt nanocubes with the capping ligands of CTAC (top) and TSC (bottom). The inset in (e) shows the photographs of (from left to right) OAm-capped Pt nanocubes in toluene (bottom phase: H2O) and TSC-capped Pt nanocubes in H2O (upper phase: toluene).