Nanoscience is the study, manipulation, and engineering of matter, particles, and structures on the nanometer scale, which is one millionth of a millimeter, the scale of atoms and molecules. At this scale, surface area and quantum mechanical effects become important in describing properties of matter. Nanotechnology is the application of nanoscience leading to the use of new nanomaterials and nanosize components in useful products. The study of nanoscience is interdisciplinary, involving fields such as physics, chemistry, materials science, and biology. The physical and chemical properties of matter change at the nano level, and materials have unique phenomena that enable new applications. Nanoscience has the potential to revolutionize a diverse range of fields, from healthcare to manufacturing. The safety of nanomaterials and nanotechnology is still being debated, tested, and assessed.