Search results

Search:
in the keywords: Flower-like architectures

Sort By:

Limit search:

Shape-controlled synthesis of polyhedral CdS flowerlike architectures and their optical properties

100%

Kong Q., Wu H., Zhang X., Yao S., Zhang J., Zhang X.

Open Chemistry

2013

vol. 11

issue 10

1682-1688

Fabrication of polyhedral CdS flower-like architectures have been achieved on a large scale through a mixed solvothermal method. The obtained CdS are characterized by X-ray diffraction, field-emission scanning electron microscopy and transmission electron microscopy, and the results indicate that the CdS flower-like architectures with diameters of 1.5–2.0 µm are hexagonal wurtzite phase and are assembled by some pyramids with the bottom side length of about 440 nm, which have some crystallographic faces. A series of relevant experiments through altering experimental parameters, indicate that the temperature, starting materials and solvent play key roles for the shape evolution of CdS flower-like architectures. The studies of optical properties for polyhedral CdS flower-like architectures indicate that the UV-vis spectroscopy shows a blue-shift absorption peak at 500 nm compared to that of bulk CdS, the photoluminescence spectroscopy shows an emission peak at 640 nm and another strong emission peak at 695 nm, which are believed to be attributed to excitonic emission and deep levels. [...]

Synthesis and optical properties of self-assembled flower-like CdS architectures by mixed solvothermal process

100%

Zhang J., Wu Y., Zhu J., Huang S., Zhang D., Yin Q.

Open Chemistry

2010

vol. 8

issue 5

1027-1033

Self-assembled CdS architectures with flower-like structures have been synthesized by a mixed solvothermal method using ethylene glycol and oleic acid as the mixed solvent at 160°C for 12 h. The results of X-ray diffraction (XRD) patterns, field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) images indicate that the product exists as the hexagonal wurtzite phase and conatins of larger numbers of flower-like CdS architectures with diameters of 1.8–3 μm. The selected-area electron diffraction (SAED) pattern and the high resolution transmission electron microscope (HRTEM) image reveal that the grain has better crystallinity. The optical properties of flower-like CdS architectures were also investigated by ultraviolet-visable (UV-vis) and photoluminescence spectroscopy at room temperature. A strong peak at 490 nm is shown in the UV-vis absorption, while an emission at 486 nm and another strong emission at 712 nm are shown in the PL spectrum. [...]

Refine search results

2 Open Chemistry

1 2013

1 2010

2 Zhang J.

1 Huang S.

1 Kong Q.

1 Wu H.

1 Wu Y.

1 Yao S.

1 Yin Q.

1 Zhang D.

1 Zhang X.

1 Zhu J.

Search results

Shape-controlled synthesis of polyhedral CdS flowerlike architectures and their optical properties

Synthesis and optical properties of self-assembled flower-like CdS architectures by mixed solvothermal process