These images show how small things are?
The Scale of the universe: https://www.youtube.com/watch?v=uaGEjrADGPA
NSF official definition:
Nanoscience and nanotechnology deal with materials and systems having the following key properties :
=Dimension: At least one dimension from 1 to 100 nanometer (nm)
=Process: Designed with methodologies that shows fundamental control over the physical and chemical attributes of molecular-scale structures
=Building block property: They can be combined to form larger structures
