This book is designed to accomplish the necessity of students of different field of science such as Chemistry, Green Chemistry, Nonochemistry, Chemical Sciences, Life Sciences, Medicinal Chemistry and Biochemistry. It is very much useful for undergraduate, graduate, postgraduates and researchers students of various fields of science. This book helps to provide knowledge about Green Chemistry, 12 Principles of Green Chemistry, Nanochemistry, Nanotechnology, Applications of Nanotechnology or Nanomaterials and use of Nano-technology in medicine.