Ethidium bromide (EtBr) is one of the most broadly used dyes in molecular biology laboratories. It was considered a strong mutagenic, carcinogenic and possesses a major safety problem for the researchers and environmental hazards during the disposal process. In the current study chitosan (CS) and polyvinylidene chloride (PVDC) based on different morphologies of TiO2-Au nanocomposites were prepared...