Zinc oxide micro-crystals with special cystiform morphology were fabricated via an improved reverse micelle method. The as-obtained sample was characterized by powder X-ray diffraction (XRD) and scanning electron micr...Zinc oxide micro-crystals with special cystiform morphology were fabricated via an improved reverse micelle method. The as-obtained sample was characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that these micro-crystals with unique structure have very strong and stable fluorescence emission in red-orange region. The possible growth mechanism and reason for special fluorescence property of the product were also discussed in detail.展开更多
CdS and CdS/ZnS quantum dots were synthesized by the microemulsion method in sulfosuccinic acid bis(2-ethylhexyl)ester sodium salt(AOT) surfactant reverse micelles containing water.The products were characterized by U...CdS and CdS/ZnS quantum dots were synthesized by the microemulsion method in sulfosuccinic acid bis(2-ethylhexyl)ester sodium salt(AOT) surfactant reverse micelles containing water.The products were characterized by UV-Vis spectrometer,transmission electronmicroscopy(TEM),energy dispersive X-ray spectroscope(EDX)and photoluminescence(PL) spectroscope.The diameter of CdS/ZnS nanoparticle was obvious larger than that of CdS nanoparticle.The diameter of the nanoparticle was estimated,which was confirmed by the images of TEM.The existence of core-shell structure was established by the result of energy dispersive X-ray analysis.PL studies of the samples showed that the luminescence from CdS was enhanced by the ZnS shell.A possible reason was that the ZnS shell reduced the number of defects on the surface of CdS quantum dots,which were assumed to act as centers for radiation-free recombination.展开更多
文摘Zinc oxide micro-crystals with special cystiform morphology were fabricated via an improved reverse micelle method. The as-obtained sample was characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that these micro-crystals with unique structure have very strong and stable fluorescence emission in red-orange region. The possible growth mechanism and reason for special fluorescence property of the product were also discussed in detail.
文摘CdS and CdS/ZnS quantum dots were synthesized by the microemulsion method in sulfosuccinic acid bis(2-ethylhexyl)ester sodium salt(AOT) surfactant reverse micelles containing water.The products were characterized by UV-Vis spectrometer,transmission electronmicroscopy(TEM),energy dispersive X-ray spectroscope(EDX)and photoluminescence(PL) spectroscope.The diameter of CdS/ZnS nanoparticle was obvious larger than that of CdS nanoparticle.The diameter of the nanoparticle was estimated,which was confirmed by the images of TEM.The existence of core-shell structure was established by the result of energy dispersive X-ray analysis.PL studies of the samples showed that the luminescence from CdS was enhanced by the ZnS shell.A possible reason was that the ZnS shell reduced the number of defects on the surface of CdS quantum dots,which were assumed to act as centers for radiation-free recombination.
