Nanocomposites are composite materials that have dimensions less than 100 nm in at least one of their phases, offering a higher surface-to-volume ratio. They are high-performance materials, exhibit unusual properties, and are considered as materials of the 21st century. In this book, experts from the field discuss the basic concepts, synthesis, characterization, properties, and applications of nanocomposites. The book is helpful for researchers, professional engineers, students, and those associated with a variety of disciplines of both academia and industry in seeking an understanding of what has been recently done in the field and the challenges related to it.