The precursor compound of two types of ZnSe magic-sized clusters

Engineered Environment‐Friendly Colloidal Core/Shell Quantum Dots for High‐Efficiency Solar‐Driven Photoelectrochemical Hydrogen Evolution

“…In contrast, as shown in Figures 1g and S3a,b, the characteristic diffraction rings of AISe/ZnSe core/shell QDs match well with the (100), (002), (101), (102), (110), (103), and (112) planes of WZ ZnSe. It is observed that the diffraction pattern signals appeared to be more clear with the growth of ZnSe shell, which implies a better crystallinity of thicker ZnSe shell materials [28] . In addition, the crystal structure of as‐synthesized QDs (Figure 1h) is further investigated by X‐ray diffraction (XRD), in which the AISe core QDs exhibited a crystal structure that corresponds to zinc blend (ZB) AISe (JCPDS No.…”

“…It is observed that the diffraction pattern signals appeared to be more clear with the growth of ZnSe shell, which implies a better crystallinity of thicker ZnSe shell materials. [28] In addition, the crystal structure of as-synthesized QDs (Figure 1h) is further investigated by X-ray diffraction (XRD), in which the AISe core QDs exhibited a crystal structure that corresponds to zinc blend (ZB) AISe (JCPDS No. 23-0637), and the AISe/ZnSe core/shell QDs manifested typical diffraction peaks that match the WZ phase ZnSe (JCPDS No.15-0105).…”

Room-temperature formation of alloy ZnxCd13−xSe13 magic-size clusters via cation exchange in diamine solution

“…1a, (ZnSe) 13 MSCs with a sharp absorption peak at 295 nm can be obtained by dispersing the pre-prepared ZnSe PCs in butane-1,4-diamine (BDA) at room temperature (about 25 °C), which is consistent with the reports in the literature. 40,41 The absorption peak of the (ZnSe) 13 MSCs disappears after standing for 2 h, indicating the poor stability of the (ZnSe) 13 MSCs in BDA solution.…”

“…S3, † a broad diffraction signal is observed in the X-ray diffraction (XRD) patterns of the (ZnSe) 13 MSCs or alloy Zn x Cd 13−x Se 13 MSCs, which suggests that the (ZnSe) 13 MSCs or alloy Zn x Cd 13−x Se 13 MSCs might be of relatively small size. 40,41 To further confirm the composition of the alloy MSCs prepared by cation exchange, X-ray photoelectron spectroscopy (XPS) spectra were recorded and are shown in Fig. S4.…”

“…Recently, Yu's group reported a two-step approach for MSCs, by which a series of binary ME MSCs (M = Zn or Cd, E = S, Se or Te) in a single-ensemble form have been facilely prepared. [35][36][37][38][39][40][41][42] In the two-step approach reported, precursor compounds (PCs) are first prepared at a relatively high temperature, and MSCs are then formed by dispersing the PCs in a specific solvent at a low temperature (usually at room temperature). Despite extensive efforts in the preparation of MSCs, the synthesis of alloyed MSCs has rarely been reported.…”