Zero-Dimensional Nanostructures : A zero-dimensional structure is one in which all three dimensions are in the nanoscale.
For example : Nanoparticles.
One-Dimensional Nanostructures : A one-dimensional nanostructure is one in which two dimensions are in the nanoscale.
For example : Nanowires and Nano rods.
Two-Dimensional Nanostructures : A two-dimensional nanostructure is one in which one dimension is in the nanoscale.
For example : Thin films.