Chemistry - Solid State Question with Solution | TestHub

Nanomaterials are classified based on the number of dimensions that are not confined to the nanoscale range (less than $100$ nm).

Zero-dimensional ($0$D) nanostructures have all three dimensions in the nanoscale range. Examples include nanoparticles, quantum dots, and fullerenes.

One-dimensional ($1$D) nanostructures have two dimensions in the nanoscale and one dimension outside it. Examples include nanorods, nanowires, and nanofibres.

Two-dimensional ($2$D) nanostructures have one dimension in the nanoscale and two dimensions outside it. Examples include thin films, nanosheets, and coatings.

Therefore, nanoparticles are zero-dimensional nanostructures.

Answer: Nanoparticles