Nanotechnology deals with the synthesis of nanoparticles, with controlled, shape, size and dispersity of material at the nanoscale. The use of nanoparticles in medicine is an attractive. Author establishes a combination of medicine values of nanotechnology with the field of medicine for the development of antibacterial agents. Nanotechnology provides an essential oil that has been known as a good plant from to modify and develop. The important properties of metal field in the form of nanoparticles having promising application in diagnostic, biomarkers, cell, labeling, contrast agents for biological, imaging, antimicrobial agent, drug delivery system and nanodrug for treatment of various diseases. The book is composed of three chapters. Chapter one deals with the nanotechnology in physics. Chapter two deals with the nanotechnology in pharmacy. And Chapter three deals with nanotechnology in microbiology.