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CdSe particles with wurtzite structure have been synthesized via solvothermal method using a mixed solution of triethylenetetramine (TETA) and de-ionized water (DIW). It was found that ball-like CdSe precursor with zinc-blende phase could be transformed to wurtzite structure after heat-treating at 580 °C in Ar atmosphere and the obtained microspheres were made up of many nanometer sized CdSe particles. The experimental results were compared with CdSe obtained via hydrothermal method using N2H4·H2O as the reducing agent and it was found that CdSe nanorods with wurtzite structure were obtained. It was speculated that TETA in the mixed solution played the role of reducing agent and surfactant. Both the as-prepared products and the annealed powders were systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared absorbance spectroscopy (FTIR) and thermogravimetric analysis (TGA).

CdSe particles with wurtzite structure have been synthesized via solvothermal method using a mixed solution of triethylenetetramine (TETA) and de-ionized water (DIW). It was found that ball-like CdSe precursor with zinc-blende phase could be transformed to wurtzite structure after heat-treating at 580 °C in Ar atmosphere and the obtained microspheres were made up of many nanometer sized CdSe particles. The experimental results were compared with CdSe obtained via hydrothermal method using N2H4·H2O as the reducing agent and it was found that CdSe nanorods with wurtzite structure were obtained. It was speculated that TETA in the mixed solution played the role of reducing agent and surfactant. Both the as-prepared products and the annealed powders were systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared absorbance spectroscopy (FTIR) and thermogravimetric analysis (TGA).

CdSe particles with wurtzite structure have been synthesized via solvothermal method using a mixed solution of triethylenetetramine (TETA) and de-ionized water (DIW). It was found that ball-like CdSe precursor with zinc-blende phase could be transformed to wurtzite structure after heat-treating at 580 °C in Ar atmosphere and the obtained microspheres were made up of many nanometer sized CdSe particles. The experimental results were compared with CdSe obtained via hydrothermal method using N2H4·H2O as the reducing agent and it was found that CdSe nanorods with wurtzite structure were obtained. It was speculated that TETA in the mixed solution played the role of reducing agent and surfactant. Both the as-prepared products and the annealed powders were systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared absorbance spectroscopy (FTIR) and thermogravimetric analysis (TGA).

CdSe particles with wurtzite structure have been synthesized via solvothermal method using a mixed solution of triethylenetetramine (TETA) and de-ionized water (DIW). It was found that ball-like CdSe precursor with zinc-blende phase could be transformed to wurtzite structure after heat-treating at 580 °C in Ar atmosphere and the obtained microspheres were made up of many nanometer sized CdSe particles. The experimental results were compared with CdSe obtained via hydrothermal method using N2H4·H2O as the reducing agent and it was found that CdSe nanorods with wurtzite structure were obtained. It was speculated that TETA in the mixed solution played the role of reducing agent and surfactant. Both the as-prepared products and the annealed powders were systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared absorbance spectroscopy (FTIR) and thermogravimetric analysis (TGA).

In the present study, ZnSe nanostructures with complex morphologies and different phase structures were synthesized via a solvothermal approach using a mixed solution of triethylenetetramine (TETA) and de-ionized water (DIW). It was found that the phase and morphology of the as-prepared products could be controlled by changing the volume ratio of TETA to DIW. Metastable ZnSe nanoflowers with layered structure could be obtained from pure TETA, which can be transformed to the wurtzite structure after heat-treating at 500 °C in Ar atmosphere. With the addition of DIW, the morphology changed from flowers to spheres, and when the volume ratio of TETA to DIW was 1:1, loose spheres composed of nanoparticles were obtained. Variation of the TETA content in the mixed solvent also allows controlling of the crystallographic phase of ZnSe (wurtzite or zinc blende). Both the as-prepared products and the annealed powders were systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared absorbance spectroscopy (FTIR), thermogravimetric analysis (TGA), and ultraviolet–visible (UV–vis) spectroscopy methods.

In the present study, ZnSe nanostructures with complex morphologies and different phase structures were synthesized via a solvothermal approach using a mixed solution of triethylenetetramine (TETA) and de-ionized water (DIW). It was found that the phase and morphology of the as-prepared products could be controlled by changing the volume ratio of TETA to DIW. Metastable ZnSe nanoflowers with layered structure could be obtained from pure TETA, which can be transformed to the wurtzite structure after heat-treating at 500 °C in Ar atmosphere. With the addition of DIW, the morphology changed from flowers to spheres, and when the volume ratio of TETA to DIW was 1:1, loose spheres composed of nanoparticles were obtained. Variation of the TETA content in the mixed solvent also allows controlling of the crystallographic phase of ZnSe (wurtzite or zinc blende). Both the as-prepared products and the annealed powders were systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared absorbance spectroscopy (FTIR), thermogravimetric analysis (TGA), and ultraviolet–visible (UV–vis) spectroscopy methods.

In the present study, ZnSe nanostructures with complex morphologies and different phase structures were synthesized via a solvothermal approach using a mixed solution of triethylenetetramine (TETA) and de-ionized water (DIW). It was found that the phase and morphology of the as-prepared products could be controlled by changing the volume ratio of TETA to DIW. Metastable ZnSe nanoflowers with layered structure could be obtained from pure TETA, which can be transformed to the wurtzite structure after heat-treating at 500 °C in Ar atmosphere. With the addition of DIW, the morphology changed from flowers to spheres, and when the volume ratio of TETA to DIW was 1:1, loose spheres composed of nanoparticles were obtained. Variation of the TETA content in the mixed solvent also allows controlling of the crystallographic phase of ZnSe (wurtzite or zinc blende). Both the as-prepared products and the annealed powders were systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared absorbance spectroscopy (FTIR), thermogravimetric analysis (TGA), and ultraviolet–visible (UV–vis) spectroscopy methods.

In the present study, ZnSe nanostructures with complex morphologies and different phase structures were synthesized via a solvothermal approach using a mixed solution of triethylenetetramine (TETA) and de-ionized water (DIW). It was found that the phase and morphology of the as-prepared products could be controlled by changing the volume ratio of TETA to DIW. Metastable ZnSe nanoflowers with layered structure could be obtained from pure TETA, which can be transformed to the wurtzite structure after heat-treating at 500 °C in Ar atmosphere. With the addition of DIW, the morphology changed from flowers to spheres, and when the volume ratio of TETA to DIW was 1:1, loose spheres composed of nanoparticles were obtained. Variation of the TETA content in the mixed solvent also allows controlling of the crystallographic phase of ZnSe (wurtzite or zinc blende). Both the as-prepared products and the annealed powders were systematically characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared absorbance spectroscopy (FTIR), thermogravimetric analysis (TGA), and ultraviolet–visible (UV–vis) spectroscopy methods.

ZnSe nanoplates were synthesized by a solvothermal method using ethylenediamine (EN) as the liganding solvent. The crystal structures, morphologies and optical properties of the precursor and ZnSe products were systematically characterized. Results reveal that precursor ZnSe(en)1/2 with a layered structure was initially obtained through solvothermal synthesis, which can be converted into hexagonal wurtzite structured ZnSe by heat-treatment in Ar atmosphere. The as-prepared ZnSe was composed of stacked nanoplates. The field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) results reveal that every nanoplate was made up of plenty of tiny single crystals. The room temperature ultraviolet–visible (UV/vis) measurements indicate that the bandgap of the obtained ZnSe is 2.7eV and a large blue shift about 1.3eV was observed in precursor ZnSe(en)1/2.

ZnSe nanoplates were synthesized by a solvothermal method using ethylenediamine (EN) as the liganding solvent. The crystal structures, morphologies and optical properties of the precursor and ZnSe products were systematically characterized. Results reveal that precursor ZnSe(en)1/2 with a layered structure was initially obtained through solvothermal synthesis, which can be converted into hexagonal wurtzite structured ZnSe by heat-treatment in Ar atmosphere. The as-prepared ZnSe was composed of stacked nanoplates. The field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) results reveal that every nanoplate was made up of plenty of tiny single crystals. The room temperature ultraviolet–visible (UV/vis) measurements indicate that the bandgap of the obtained ZnSe is 2.7eV and a large blue shift about 1.3eV was observed in precursor ZnSe(en)1/2.

ZnSe nanoplates were synthesized by a solvothermal method using ethylenediamine (EN) as the liganding solvent. The crystal structures, morphologies and optical properties of the precursor and ZnSe products were systematically characterized. Results reveal that precursor ZnSe(en)1/2 with a layered structure was initially obtained through solvothermal synthesis, which can be converted into hexagonal wurtzite structured ZnSe by heat-treatment in Ar atmosphere. The as-prepared ZnSe was composed of stacked nanoplates. The field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) results reveal that every nanoplate was made up of plenty of tiny single crystals. The room temperature ultraviolet–visible (UV/vis) measurements indicate that the bandgap of the obtained ZnSe is 2.7eV and a large blue shift about 1.3eV was observed in precursor ZnSe(en)1/2.

ZnSe nanoplates were synthesized by a solvothermal method using ethylenediamine (EN) as the liganding solvent. The crystal structures, morphologies and optical properties of the precursor and ZnSe products were systematically characterized. Results reveal that precursor ZnSe(en)1/2 with a layered structure was initially obtained through solvothermal synthesis, which can be converted into hexagonal wurtzite structured ZnSe by heat-treatment in Ar atmosphere. The as-prepared ZnSe was composed of stacked nanoplates. The field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) results reveal that every nanoplate was made up of plenty of tiny single crystals. The room temperature ultraviolet–visible (UV/vis) measurements indicate that the bandgap of the obtained ZnSe is 2.7eV and a large blue shift about 1.3eV was observed in precursor ZnSe(en)1/2.