Materials science is an interdisciplinary field of researching and discovering materials. It is the study of the properties of solid materials and how those properties are determined by a material's composition and structure. This book contains five chapters. The first chapter demonstrates the importance of nano-fertilizer. The second chapter briefly tells about 3D printing. The third chapter shows polymer perovskites composites for energy applications. The fourth chapter demonstrates the novelty of antimicrobial peptides as an emerging materials for antibiotics. The fifth chapter describes about aluminium along with its novel properties and applications.