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Abstract: Well-dispersed α-Fe2O3 parallelepiped nanocrystals have been successfully prepared via a hydrothermal synthetic route. The shapes and structures of the products were characterized by using powder X-ray diffraction and scanning electron microscopy. The results showed that the α-Fe2O3 samples have a parallelepiped shape with an average parallel side of 80–90nm and thickness of 60–70nm. The parallelepiped nanocrystals exhibited a ferromagnetic behavior with the coercive force, saturation magnetization, and remanent magnetization of 920Oe, 0.44emu/g, and 0.17emu/g, respectively. The crystal growth process was discussed on the basis of time-dependent experimental results. [Copyright &y& Elsevier]

A series of Bi2S3microstructures, including crepe paper flower-like structures, multibranched nanobelts, actinomorphic-flower-like 2-D assembled nanowire arrays, straw-tied-like nanowire arrays, and nanowires have been synthesized through facile decomposition of the as-formed bismuth diethyldithiocarbamate (Bi-DDTC) single-source precursor in its precursor solution. The morphologies and concentration and site of structure defects of the Bi2S3microstructures can be controlled by manipulating the concentration of Bi/DDTC and the reaction time. Possible growth mechanisms involving defect effects, oriented attachment and folding–splitting–attaching growth were proposed, which were responsible for morphology and structure evolution of various Bi2S3microstructures. [ABSTRACT FROM AUTHOR]

Abstract: ZnO whisker arrays have been prepared by a self-source procedure of the substrate under hydrothermal conditions. Zinc foils were used as a substrate and zinc-ion source for direct growth of ZnO whiskers. SEM observations revealed that the as-prepared ZnO whiskers exhibit hexagonal prism-like shape showing well-defined crystallographic facets and hexagonal pyramid-like sharp tips. The growth of ZnO whiskers in the initial stage has been recorded, and the growth mechanism was discussed in detail. [Copyright &y& Elsevier]

Abstract: One-dimensional Sb2S3 and Sb2Se3 crystals with straw-tied-like architectures have been successfully prepared in high yield by a one-pot hydrothermal method using water-soluble potassium antimony tartrate as antimony source. X-ray powder diffraction results and electron diffraction (ED) analysis show that the Sb2S3 wires and Sb2Se3 rods have a preferential growth direction along their c-axis. The peculiarities of the one-dimensional (1-D) growth mechanism are discussed. [Copyright &y& Elsevier]

Abstract: A simple and facile solution route has been developed for phase and morphology controllable synthesis of antimony trioxide (Sb2O3) microcrystals. Orthorhombic phase and cubic phase Sb2O3 microcrystals have been selectively synthesized in high yield. The products were characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The as-obtained microcrystals exhibited a variety of morphologies and structures, such as microspindles, nanoplates, and octahedra. Several experimental parameters have been investigated to gain morphology control of Sb2O3 microcrystals. Based on the time-dependent experimental results, an aggregation, and recrystallization mechanism was proposed to describe the formation process of these novel microstructures. [Copyright &y& Elsevier]