We show an effective method of healing the Stone–Wales(SW)defects through low energy electron irradiation using ab initio molecular dynamics simulation.The SW defects can be healed by irradiation through bond rotatio...We show an effective method of healing the Stone–Wales(SW)defects through low energy electron irradiation using ab initio molecular dynamics simulation.The SW defects can be healed by irradiation through bond rotation.Although the healing energy shows an anisotropic behavior,it is lower than the displacement threshold energy.The healing of the SW defect through electron irradiation can be effectively used in other sp2-bonded materials.展开更多
ZnS thin films are prepared by thermal evaporation of high-purity ZnS powder on quartz glass substrates.The samples were annealed in floating argon at temperatures from 300℃to 900℃.The effects of annealing temperatu...ZnS thin films are prepared by thermal evaporation of high-purity ZnS powder on quartz glass substrates.The samples were annealed in floating argon at temperatures from 300℃to 900℃.The effects of annealing temperature on the structural and optical properties were investigated by x-ray diffraction(XRD),scanning electron microscope(SEM)and optical absorption.The results show that annealing below 500℃is beneficial to improve the quality of ZnS films.When the annealing temperature exceeds 500℃,ZnS is gradually oxidized into ZnSO4,which has evident influences on the structural and optical properties of ZnS films.展开更多
基金Supported by the China Postdoctoral Science Foundation under Grant No 20090461331the Natural Science Foundation of Zhanjiang Normal College under Grant No ZL1005.
文摘We show an effective method of healing the Stone–Wales(SW)defects through low energy electron irradiation using ab initio molecular dynamics simulation.The SW defects can be healed by irradiation through bond rotation.Although the healing energy shows an anisotropic behavior,it is lower than the displacement threshold energy.The healing of the SW defect through electron irradiation can be effectively used in other sp2-bonded materials.
基金Supported by the China Postdoctoral Science Foundation under Grant No 20090461331the Natural Science Foundation of Zhanjiang Normal College under Grant No ZL1005.
文摘ZnS thin films are prepared by thermal evaporation of high-purity ZnS powder on quartz glass substrates.The samples were annealed in floating argon at temperatures from 300℃to 900℃.The effects of annealing temperature on the structural and optical properties were investigated by x-ray diffraction(XRD),scanning electron microscope(SEM)and optical absorption.The results show that annealing below 500℃is beneficial to improve the quality of ZnS films.When the annealing temperature exceeds 500℃,ZnS is gradually oxidized into ZnSO4,which has evident influences on the structural and optical properties of ZnS films.
