Sorry mate but you're just misunderstanding scientific terminology. The term"Nano-particles" is a term referring to the size of a particle. Here's the definition:- " Nanoparticle WRITTEN BY Stephen King See All Contributors Dr Stephen King has a background in colloid science and is a Principal Scientist at the ISIS Pulsed Neutron Source, Harwell UK, where he has special responsibility for Environmental Science. He has published... See Article History Nanoparticle, ultrafine unit with dimensions measured in nanometres (nm; 1 nm = 10−9 metre). Nanoparticles exist in the natural world and are also created as a result of human activities. Because of their submicroscopic size, they have unique material characteristics, and manufactured nanoparticles may find practical applications in a variety of areas, including medicine, engineering, catalysis, and environmental remediation."