The book presents advances in the field of functional materials. Keywords: CIGS Solar Cell, Drag Resistivity, Electron Beam Cladding, Electron Transport, Electronic Structure , Gold Nanoparticles, GTA Cladding, Hole Transport Layer, Hole-Hole Interactions, Intercalator , Interparticle Coupling, Laser Cladding. Mesons, Monolayer, Nanoribbons, Nanostructures, Nanoscale Devices, NEGF, Nucleic Acid, Perovskite Solar Cell, Plasma Chemistry, Thin Film Solar Cell Simulation, Schrodinger Equation, Thermal Spraying, TIG Cladding, UV-Vis and TEM Analysis, Wear Resistance.