The properties of materials change depending upon their size. This book explores the field of nano-scale particles and their grounding methods. Nanoparticle is a universal challenge for today's technology and future researches. Nanoparticles encompass approximately all kinds of sciences and manufacturing technologies. The characteristics of these particles are overcoming current scientific hurdles and have passed the restrictions of conventional science. This is why nanoparticles have been classified for use in various fields. The book discusses significant topics related to toxic and drug nanoparticles. This book will be beneficial for students and experts interested in this field.