Phase transition of CdS in the presence of ethylenediamine and formation of hollow CdS submicron particles with needle-like structure

Solid submicron particles, composed of amorphous, hexagonal and cubic phase CdS, were synthesized in water-ethylenediamine solution by precipitating Cd2+ ions with S2- ions, which were generated from the radiolytic reduction of Na2S2O3. In addition, the effects of the absorbed dose on the crystallization process of CdS were investigated in detail. Moreover, hollow CdS submicron particles with needle-like structure could be obtained from the solid CdS submicron particles probably through a hollowing process based on Ostwald ripening and the phase transition of CdS from amorphous to crystalline. In the above processes, ethylenediamine played an important role.