Room temperature preparation of novel Cu_(2-x)Se nanotubes in organic solvent

摘要

A compound with a non-layered structure composed of Cu_(2-x)Se nanotubes was prepared in a room temperature redox reaction in ethylene diamine solution. The product was characterized by x-ray diffractometry, transmission electron microscopy, high resolution transmission electron microscopy, and x-ray photoelectron spectroscopy. Analysis shows that the nanotubes have a multiwall structure with (002) planes of face-centred cubic Cu_(2-x)Se and open ends. The Cu_(2-x)Se nanotubes have length 500 nm, with an inner diameter of 20 nm and an outer diameter of 30 um on average. Ethylene diamine's ability to achieve strong coordination and the presence of the reducing agent hydrazine hydrate aid the formation of Cu_(2-x)Se nanotubes with mixed valence.