This book gives a summary of the rapidly growing field of nanotechnology and includes materials and technologies that help in developing particles of various sizes, which can be utilized in different areas of research. It discusses the role of nanotechnology in different aspects, such as healthcare, especially in target-specific drug therapy for managing a number of medical disorders; agriculture, for developing smart field systems; and food industry, for improving and stabilizing the quality, healthiness, and shelf life of food. Being multidisciplinary, this book brings together the principles, theory, practices, and applications of not only nanotechnology but also those of nanobiotechnology, pharmaceuticals, food packaging, biosensors, and electronic devices. The book will be an exhilarating read for advanced undergraduate- and graduate-level students, general readers interested in nanotechnology, and researchers in chemistry, biology, and engineering. The scope of the book extends from basic research in physics, chemistry, and biology, including computational work and simulations, through to the development of new devices and technologies for applications in a wide range of industrial sectors (including information technology, medicine, manufacturing, high-performance materials, and energy and environmental technologies). It covers organic, inorganic, and hybrid materials and is an interdisciplinary book.