Fig. 7
From: Room-temperature superionic-phase nanocrystals synthesized with a twinned lattice
Structural characteristics of Cu1.93S NCs prepared by post-synthetic air oxidation. a Wide-field TEM image (scale bar = 20 nm) of Cu1.93S NCs synthesized by the hot-injection method and b histogram showing NC diameter distribution determined by ImageJ analysis of the TEM image in a. The average diameter of the NCs is determined to be 6.2 nm with a standard deviation of 0.5 nm. HRTEM image (scale bar = 5 nm) of a representative NC of c Cu1.97S and d Cu1.93S obtained from Cu1.97S by post-synthetic air exposure. e experimental PXRD patterns of Cu1.97S NCs and Cu1.93S NCs prepared by air oxidation of Cu1.97S NCs for 24 h. The reference pattern of djurleite phase (JCPDS # 23–0959) is shown by the stick plot. The sub-stoichiometry was estimated from the LSPR peak energy for the corresponding NCs (0.42 eV: Cu1.97S and 0.65 eV: Cu1.93S)
