Undoped and Mn-doped ZnS nanoparticles were successfully prepared through a coprecipitation method at low-temperature processing. The X-ray diffraction patterns reveal that the undoped and Mn-doped ZnS nanoparticles have polycrystalline nature with cubic ZnS structure. Furthermore, the lattice constant of the ZnS nanoparticles increases with an increase in the Mn doping concentration. Transmission electron microscope images demonstrated the as-synthesized nanoparticles have particle size ranging from 3 to 5 nm with spherical-shaped particles. Optical band gap values were found to increase from 3.32 to 3.50 eV with the increasing Mn doping concentration. The magnetic properties of undoped and Mn-doped ZnS samples were studied using the vibrating sample magnetometer at room temperature. The synthesized undoped ZnS nanoparticles exhibit ferromagnetism, while Mn-doped ZnS nanoparticles showed paramagnetism at room temperature. Moreover, the saturation magnetization of Mn-doped ZnS samples is higher compared to undoped ZnS. The present synthesis technique to produce high-crystalline quality Mn-doped ZnS nanoparticles and prepared nanoparticles has great potential applications in spintronic and optoelectronic devices.

通过共沉淀法，在低温条件下成功制备了未掺杂和Mn掺杂的ZnS纳米颗粒。X射线衍射图谱表明，未掺杂和Mn掺杂的ZnS纳米颗粒具有立方ZnS结构的多晶性质。此外，ZnS纳米粒子的晶格常数随着Mn掺杂浓度的增加而增加。透射电子显微镜图像表明，所合成的纳米颗粒具有球形颗粒，粒径为3至5nm。发现随着Mn掺杂浓度的增加，光学带隙值从3.32eV增加到3.50eV。在室温下使用振动样品磁力计研究了未掺杂和Mn掺杂的ZnS样品的磁性。合成的未掺杂的ZnS纳米颗粒表现出铁磁性，而Mn掺杂的ZnS纳米颗粒在室温下表现出顺磁性。此外，与未掺杂的ZnS相比，掺杂Mn的ZnS样品的饱和磁化强度更高。目前生产高品质锰掺杂的ZnS纳米粒子和制备的纳米粒子的合成技术在自旋电子和光电器件中具有巨大的潜在应用。