Any engineered structure with a monomeric unit in size range of 1-100 nm is considered a nanomaterial. Macroscopic materials with nano-scale surface features and microscopic particles in the nano-size range are thus included.

Fremont, CA: Nano-based therapeutics and diagnostic systems have been increasingly being used in a variety of fields of medicine as sensors, immunostimulants, delivery vehicles, radiation sensitizers, and viral inhibitors. The application of nanomaterials in the diagnosis, prevention, and treatment of viral diseases is reviewed in detail in a paper recently published in the journal Pharmaceutics, highlighting areas of significant progress or stagnation over the last few decades.