The study of manipulating materials on molecular as well as atomic scales is known as Nanotechnology. Nanotechnology deals with matters that are sized in between 1 to 100 nanometers. Nanotechnology is a new field of technology with science at nano levels. Materials behave differently at nano levels while their physical and chemical properties are unique at nano level. Nanotechnology can be applied in almost all the areas. The wide array of applications in nanotechnology has come to show one and all how much importance nanotechnology has in our lives today. Nanoscience and technology provides new ways and means to tackle critical issues and challenges in a very different manner for the benefit of mankind. This has to be understood by students, research scholars and scientists as well. The understanding of the nanomaterials and their properties are very essential for proper application in any field of science and technology. This book is written with an objective that students must understand the basic principles of nano science and technology for their further perspectives.