Synthesis Of Nano And Micro Semiconductor By Soft Chemistry Method

Low-dimensionalⅡ-Ⅵgroup semiconductor nanomaterials have received interests due to their novel physical, chemical, and biological properties as well as the potential applications in nanodevices and bio-medicine field.Synthesis ofⅡ-Ⅵgroup semiconductor nanomaterials which morphology and size can be controlled artificiaily is of importance for the fundamental research and application.The samples are characterized by X-ray diffraction(XRD), field emission scanning electron microscopy(SEM), transmission electron microscopy(TEM), high resolution transmission electron microscopy(HRTEM) and photoluminescence spectra(PL) and so on. Nano flower of ZnO with the wurtzite structure are successfully and fast synthesized by microwave in CTAB, and we find the optimal reaction conditions; Nanoparticles ZnS, Nanoparticles ZnS:Mn2+ and ZnS:Cu2+ are synthesised by microwave heating. The optimal reaction conditions and optimal doping concentration are detected. The results show as followe:the optimal doping concentration is respectively 5%Mn2+ and 0.5%Cu2+. The sample of ZnS:0.5%Cu2+ emits green light when the excitation wavelength is 310nm. And the sample of ZnS: 5%Mn2+ emits blue-violet light when the excitation wavelength is 350nm; The sample of ZnS is successfully synthesized by hydrothermal method in CTAB. The optimal reaction condition is detected; At last the Fe3O4@CdS core-shell nanoparticles are successfully synthesized.Their size is about 60nm. The Fe3O4@CdS core-shell nanoparticles emit blue-white light when the excitation wavelength is 310nm.