One-dimensional zinc-blende CdTe nanocrystals were successfully synthesized by a green and ambient pressure aqueous solution synthesis at relatively low temperature. The synthesized nanocrystallites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and energy-dispersive X-ray spectroscopy (EDX), and chemical reactions of the aqueous medium synthesis were described. The resultant morphology of ZB-CdTe nanocrystals derived from different reaction solutions showed that the initial tellurium precursor concentration was a crucial factor determining the shape-controllable growth. The degradation of Te monomer concentration in reaction solutions with synthesis temperature and time were experimentally monitored, indicating that about 70-80% consumption of active Te monomer concentration was completed in temperature rise range within early 15 min. This implied that there was a burst of homogeneous nucleation and spherical growth in this period of time, supplying a large amount of pileup cells for subsequent oriented attachment growth of nanorods. A proposed growth model was a combination of both the oriented attachment mechanism and the Ostwald ripening mechanism, which was demonstrated based on the direct HRTEM morphology evolution and the counted diameter frequency distribution of the resultant 1D CdTe nanocrystals.

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Low-dimensional Pb-Br and Pb-Cl perovskite single crystals have aroused considerable attention for their broadband white-light emission. But the synthesis involving halogenation of organic amines, dissolution of lead oxide and slow...