Jiasheng Xu , Dongfeng Xue. Fabrication of upended taper-shaped cuprous thiocyanate arrays on a copper surface at room temperature. J. Phys. Chem. B , 2006, 110 (23): 1123211236. ( Citations : 13 ) A new strategy has been well designed to form upended taper-shaped cuprous thiocyanate (hereafter abbreviated as CuCNS ) arrays on a copper substrate using a simple solution-phase method at room temperature. This method consists in a liquid-solid reaction between a solution of thiocyanate ammonium and the copper substrate itself in the assistance of formamide. Novel CuCNS arrays are approximately perpendicular to copper substrate surfaces. Every single crystal shows an upended taper-like morphology (i.e., the tip end points into the surface of copper substrate and the other big end of taper exposes out, it likes a dart thrusting into the copper substrate). On the basis of structure and chemical bond analysis, CuCNS crystals tend to grow along the c -axis, which is essential for the formation of CuCNS arrays on a copper substrate. This approach also provides a facile strategy to produce different patterns on different copper substrates, which may be applicable to the synthesis of other inorganic materials with various potential applications.
Jiasheng Xu , Dongfeng Xue. Hydrothermal synthesis of lindgrenite with a hollow and prickly sphere-like architecture. J. Solid State Chem. , 2007, 180 (1): 1 19 1 26 . ( Citations : 3 ) Abstract Lindgrenite with a hollow and prickly sphere-like architecture has been synthesized via a simple and mild hydrothermal route in the absence of any external inorganic additives or organic structure-directing templates. The hierarchical lindgrenite particles are hollow and prickly spheres, which are comprised of numerous small crystal strips that are aligned perpendicularly to the spherical surface. Two factors are important for the formation of hollow and prickly architecture in the present process. One is the general phenomenon of Ostwald ripening in solution, which can be responsible for the hollow structure; the other is that lindgrenite crystals have a rhombic growth habit, which plays an important role in the formation of prickly surface. Furthermore, Cu 3 Mo 2 O 9 with the similar size and morphology can be easily obtained by a simple thermal treatment of the as-prepared lindgrenite in air atmosphere. Keywords: Lindgrenite; Cu 3 Mo 2 O 9 ; Hollow sphere; Prickly sphere; Hydrothermal synthesis
Jiasheng Xu , Dongfeng Xue. Fabrication of malachite with a hierarchical sphere-like architecture. J. Phys. Chem. B , 2005, 109 (36): 1715717161. ( Citations : 44 ) ABSTRACT: Malachite (Cu 2 (OH) 2 CO 3 ) with a hierarchical sphere-like architecture has been successfully synthesized via a simple and mild hydrothermal route in the absence of any external inorganic additives or organic structure-directing templates. Powder X-ray diffraction, scanning electron microscopy, and Fourier transmission infrared spectrometry are used to characterize various properties of the obtained malachite samples. The hierarchical malachite particles are uniform spheres with a diameter of 10 - 20 m m, which are comprised of numerous two-dimensional micro-platelets paralleling to the sphere surface . The initial concentration of reagents, the hydrothermal reaction time and temperature are important factors, which dominantly affect the evolution of crystal morphologies. The growth of the hierarchical architecture is believed to be a layer-by-layer growth process. Further, copper oxide with the similar morphology can be easily obtained from the as-prepared malachite.
Jiasheng Xu , Dongfeng Xue. Fabrication of copper hydroxyphosphate with complex architectures. J. Phys. Chem. B , 2006, 110 (15): 77507756. ( Citations: 15) Copper hydroxyphosphate with complex architectures has been successfully synthesized through a simple and mild hydrothermal route in the absence of any external inorganic additives or organic structure-directing templates. Powder X-ray diffraction, scanning electron microscopy, and Fourier transform infra red spectrometry are used to characterize various properties of the obtained samples. Single-crystals, twinned-crystals, and various novel architectures of copper hydroxyphosphate can be constructed through a careful control of synthetic parameters, such as the molar ratio of initial reagents, reagent concentration, reaction time and temperature. On the basis of structure and chemical bond analysis, c opper hydroxyphosphate crystals tend to grow along the c -axis and have a rotation twinned-crystal growth habit, which is essential for the formation of various complex architectures. This approach provides a facile strategy to synthesize copper hydroxyphosphate crystals with unique morphologies and complex architectures, which may be applicable to the synthesis of other inorganic materials.
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