Q50 / 150 · MHT CET 2026 (15 April Shift 1) · Chemistry
Which of the following nano structures includes nanotubes as an example?
- AZero dimensional
- Correct answerBOne dimensional
- CTwo dimensional
- DThree dimensional
Solution
Nanomaterials are classified based on the number of dimensions that are outside the nanoscale range (greater than $100$ nm).
Zero-dimensional (0D) nanomaterials have all three dimensions in the nanoscale. Examples include quantum dots and nanoparticles.
One-dimensional (1D) nanomaterials have two dimensions in the nanoscale and one dimension outside the nanoscale. Examples include nanotubes, nanowires, and nanorods.
Two-dimensional (2D) nanomaterials have one dimension in the nanoscale and two dimensions outside the nanoscale. Examples include graphene and thin films.
Three-dimensional (3D) nanomaterials have no dimensions in the nanoscale but possess nanoscale features. Examples include bulk nanomaterials.
Since nanotubes have a nanoscale diameter but a macroscopic length, they are classified as one-dimensional nanostructures.
Answer: One dimensional
Zero-dimensional (0D) nanomaterials have all three dimensions in the nanoscale. Examples include quantum dots and nanoparticles.
One-dimensional (1D) nanomaterials have two dimensions in the nanoscale and one dimension outside the nanoscale. Examples include nanotubes, nanowires, and nanorods.
Two-dimensional (2D) nanomaterials have one dimension in the nanoscale and two dimensions outside the nanoscale. Examples include graphene and thin films.
Three-dimensional (3D) nanomaterials have no dimensions in the nanoscale but possess nanoscale features. Examples include bulk nanomaterials.
Since nanotubes have a nanoscale diameter but a macroscopic length, they are classified as one-dimensional nanostructures.
Answer: One dimensional
Hence, the correct answer is option: 'B'.