Book excerpt: The book provides an introduction to nanostructured materials and guides the reader through their different engineering applications. It gives an overview of nanostructured materials applied in the fields of physics, chemistry, biology, medicine, and materials science. Materials for different applications in engineering such as those used in opto-electronics, energy, tribology, bio-applications, catalysis, reinforcement and many more have been described in this book. The book will be of interest to researchers and students who want to learn about applications of nanostructured materials in engineering.