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The 3D beta-In2S3 flowerlike architecture assembled from nanoflakes was prepared via a novel complex-precursor assisted (CPA) solvothermal route. The as-prepared beta-In2S3 powder was characterized by X-ray diffraction pattern (XRD), X-ray photoelectron spectra (XPS), transition electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), ultraviolet-visible light (UV-vis) spectra, and photoluminescence spectrum. The novel 3D beta-In2S3 nanostructure exhibit a strong quantum confinement effect. FT-IR spectra were used to investigate the coordinative chemical effect in the complex. A possible mechanism was discussed.

SnS2 nanobelts were successfully synthesized through a controllable solution-phase hydrothermal method on a large scale. The nanobelts have a very high yield, which is more than 95%, with widths ranging from 100 to 200 nanometers, lengths up to several micrometers and thicknesses ca. 10 nanometers. X-ray diffraction patterns, electronic diffraction, X-ray photoelectron spectra, field emission scanning electron microscopy images, transmission electron microscopy images and high-resolution transmission electron microscopy investigated the phase structures, compositions, and morphologies of SnS2 nanobelts. Dodecanethiol played important roles in the process of SnS2 nanobelts formation and growth. The formation mechanism of SnS2 nanobelts was investigated and discussed on the basis of the experimental results.

Single-crystalline PbI2 nanobelt bundles have been prepared using lead monoxide powder and hydroiodic acid as reagents at the assistance of dodecylamine. The assembled PbI2 nanobelt bundles can be spilt into nanobelts through long-playing sonication. The prepared nanobelt bundles consist of several nanobelts and the nanobelts have lengths of tens of microns, widths of 50-150 nanometers, and thicknesses ca. 20 nanometers. X-Ray diffraction (XRD), scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM) transmission electron microscopy (TEM), electronic diffraction (ED), and high-resolution transmission microscopy (HRTEM) was used to characterize the as-prepared product. The possible formation mechanism of PbI2 nanobelt bundles was tentatively proposed.

A novel refluxing method is presented to synthesise Eu3+-doped La2O2S nanocrystalline phosphors by employing lanthanum formate, europium formate and sulphur powder as reactants and triethylene tetramine with n-dodecanethiol as solvents. The sizes and morphologies of La2O2S : Eu3+phosphors could be controlled from nanoflakes (10 ± 2 nm in thickness), micrometre vesicles (1 µm in diameter), to spherical nanocrystals (average 100 nm in diameter) by simply adjusting the solvent ratios of n-dodecanethiol to triethylene tetramine. The photoluminescence excitation and emission spectra were used to characterise the as-synthesised nanocrystalline phosphors. The results show that Eu3+occupies C3Vsite in Eu3+-doped La2O2S nanocrystals, which is the same as in bulky La2O2S : Eu3+crystals. The fluorescent decay curves for5D0  7F2transition (624 nm) of Eu3+-doped La2O2S spherical nanocrystals show a long decay time(1.2 ms) and a short decay time(0.4 ms), which embodies the fluorescent decay feature of nanosized phosphors. The as-synthesised La2O2S : Eu3+nanocrystals display strong red emission at 624 nm, suggesting potential applications in the fields of light displays, light emitting diodes and devices. [ABSTRACT FROM PUBLISHER]

Abstract: Large-scale copper sulfide polycrystalline nanorods have been solvothermally synthesized through a Cu(acac)2 precursor decomposition and reaction route. X-ray diffraction (XRD) showed that the product was hexagonal phase CuS with lattice constants of a =3.795Å and c =16.42Å. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) investigated the morphology of the product under the different growth conditions. PL spectra indicated that the rod-shaped product had emission peaks at 414 and 437.5nm when the excitation wavelength was 371.5nm, but the CuS dendrite did not demonstrate emission peaks at the same condition. A mechanism of Cu(acac)2 micronrods decomposition and reaction with CS2 in situ was suggested based on the TEM observation. [Copyright &y& Elsevier]