Figure 3.
Representative TEM micrographs of AuNRs (∼109 M) assemblies after 10 min in ethanol, using 1,8-octanedithiol (0.5 mM) as molecular linker: (a) 130 μJ/cm2 per pulse at 1 kHz and (b) 650 μJ/cm2 per pulse at 1 kHz. (c) Statistical distribution of AuNRs in assembled species after 10 min of reaction without laser irradiation (black), 130 μJ/cm2 per pulse at 1 kHz irradiation (red) and 650 μJ/cm2 per pulse at 1 kHz irradiation (blue). (d) Angular distribution of the AuNRs dimers obtained after irradiation with 130 mJ/cm2 laser pulses irradiation. TEM micrographs of a dimer (e) and a tetramer (g) obtained by irradiation at 130 μJ/cm2 per pulse. (f,h) Magnifications of the interparticle region within (e,g), respectively. (i) HAADF-STEM image of a trimer with the CBED patterns shown as insets. (j,k) High-resolution HAADF-STEM images of the connection points between the AuNRs in the trimer.