Optimization of Copper Ion Concentration into the Lattice of Barium Sulphide Nanoparticles Synthesized via a Chemical Approach McDonald Chukwudi OKAFOR, Lawrence Ese ESIEKPE, Vivian Anulichukwu ATTOH, Nwando Blessing OKEKE, Azuka Bright OKWUELUM, Joseph Onyeka EMEGHA*, 10.57647/jtap.2026.2002.12 Requires Subscription PDF downloads: 156