Self-assembly of copper sulfide nanoparticles to solid, hollow spherical and wire-shaped structures

Copper Sulfides, such as Cu7S4, Cu1.81S and Cu1.81S and Cu2S, in the wire-like, and solid and hollow ball-like shapes congregated from nano-spherical particles and nanoslices, have been prepared by it solvothermal method using it mixture of water and ethylene glycol as solvent. CuSO4 and thiourea were used as the starting materials Without assistance of any surfactant or template. The results show that the water content in the solvent affects the morphology of the samples, and the reaction time and temperature affect the crystal structure and morphology. Oil the basis of the obtained results, the formation processes of different morphologies of copper sulfides can be interpreted by the following mechanism: nanoparticlcs of copper sulfides initially formed, then the wire-like structures were gradually created, and finally translated to solid and hollow spherical Structures under the different experimental conditions.