Chemistry - Solid State Question with Solution | TestHub

Nanomaterials are classified based on the number of dimensions that are in the nanoscale range ($1$ to $100$ nm):

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

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

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

Therefore, nanotubes are an example of a one-dimensional nanostructure.

Answer: Nano tubes