关键词: PbS;树枝晶;水热法;生长机理

Abstract: Three dimensional (3D) octa-pod-like PbS dendrites were controllably prepared by hydrothermal method using Pb(NO3)2 and KSCN as raw materials. X-ray diffraction (XRD) pattern indicates that the as-prepared products are of face-centered cubic phase structure and crystallize very well. Scanning electron microscope (SEM) images show that the as-obtained samples mainly take on 3D superstructures with eight pods. Each pod has average diameter of about 5 μm, which self-assembled by flake-like cube with edge lengths of 600-800 nm. Based on the schematic pattern of PbS crystals and SEM observation connected with the reaction time, The shape evolution process of the octa-pod-like PbS dendrites was investigated, which may provide beneficial reference for studying the growth mechanism of some microcrystals with superstructure.

Key words: Three dimensional (3D) octa-pod-like PbS dendrites were controllably prepared by hydrothermal method using Pb(NO3)2 and KSCN as raw materials. X-ray diffraction (XRD) pattern indicates that the as-prepared products are of face-centered cubic phase structure and crystallize very well. Scanning electron microscope (SEM) images show that the as-obtained samples mainly take on 3D superstructures with eight pods. Each pod has average diameter of about 5 μm, which self-assembled by flake-like cube with edge lengths of 600-800 nm. Based on the schematic pattern of PbS crystals and SEM observation connected with the reaction time, The shape evolution process of the octa-pod-like PbS dendrites was investigated, which may provide beneficial reference for studying the growth mechanism of some microcrystals with superstructure.