title: Sonochemical synthesis and mechanistic study of copper selenides Cu(2-x)Se, beta-CuSe, and Cu(3)Se(2).
abstract: Nanocrystallites of nonstoichiometric copper selenide (Cu(2-x)Se) and stoichiometric copper selenides (beta-CuSe and Cu(3)Se(2)) were synthesized in different solutions via sonochemical irradiation at room temperature. The influence of solvents, surfactants, and ultrasonic irradiation on the morphology and phase of products has been investigated. The morphological difference of the products was mainly affected by the solvents and surfactants, which can self-aggregate into lamellar structures or microemulsions, and then these unique structures can act as both supramolecular template and microreactor to direct the growth of copper selenides. On the other hand, it was also found that the sonochemical irradiation and solvents played an important role in the formation of different phases of copper selenides. The proposed formation mechanism of copper selenides is discussed.
authors.affiliation: Structure Research Laboratory, Laboratory of NanoChemistry and NanoMaterials, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China. yxie@ustc.edu.cn
authors.forename: Yi
authors.initials: Y
authors.lastname: Xie
authors.forename: Xiuwen
authors.initials: X
authors.lastname: Zheng
authors.forename: Xuchuan
authors.initials: X
authors.lastname: Jiang
authors.forename: Jun
authors.initials: J
authors.lastname: Lu
authors.forename: Liying
authors.initials: L
authors.lastname: Zhu