球形ZnS纳米粒子的制备和光学性质

用快速均匀沉淀法制备了平均粒径3nm左右的球形ZnS纳米粒子。并且讨论了成长时间，反应温度，体系pH值，反应物浓度和配比对ZnS纳米粒子尺寸的影响。通过XRD，BET，紫外可见吸收光谱表征了ZnS纳米粒子的尺寸、结构和表面态性质。通过红外吸收光谱证明了吸附在ZnS纳米颗粒上的乙酸基起到控制粒子长大和防止团聚的作用。研究了ZnS纳米晶粒的荧光光谱，证实其在425nm处的蓝色发光峰是来源于表面硫空位与锌空位之间的电子-空穴复合跃迁发光。

Preparation and Optical Properties of Spherical ZnS Nanoparticles

Nanoparticles of zinc sulphide with average size about 3 nm, are synthesized by a chemical method for quick homogeneous precipitation. The effects of preparation parameter on ZnS particles such as reaction temperature, growth time, pH condition, concentration are discussed. XRD, BET and UV-V absorption are used to characterize the size, structure and surface states of ZnS nanoparticles. The FTIR spectrum of ZnS nanoparticles demonstrates that the acetic ions, absorbed on the surface of nanoparticles can control the growth and avoid the aggregation of particles. Photoluminescence measurements show that the peak at 425 nm in the photoluminescence emission specturm of ZnS is attributed to the electron-hole recombination from surface vacancies to Zn and S atoms. The nanoparticles provide a suitable semiconductor nanocluster for optoelectronic and a phosphor suitable for flat display technology.