Structural and optical properties of Ag2S nanotubes prepared by laser ablation in liquid

Abstract

Abstract Synthesis of Ag2S nanotubes (NTs) by laser ablation of silver target in Thiourea (Tu) aqueous solution without using catalyst was demonstrated. The structure, morphology, size and elemental composition of Ag2S NTs were investigated. X-ray diffraction (XRD) results show that the Ag2S NTs are crystalline with monoclinic phase. The optical energy gap of Ag2S NTs is around 1.6 eV at fluence 4.7 Jcm−2. Transmission electron microscope TEM investigation reveals the formation of NTs Ag2S morphologies with the diameter of 26-30 nm and lengths of 200-400 nm. Raman spectra of Ag2S nanorods show the presence of active Raman peaks indexed to Ag modes and the stretching bending Ag-S bonds and 2LO mode of Ag2S.