Question

Which among the following is NOT an example of one-dimensional nanostructure?

• A. Nano shells
• B. Nanowires
• C. Nanotubes
• D. Fibres

Hint:

Remember: 0D = quantum dots, nanoparticles; 1D = wires, tubes; 2D = graphene, nanosheets; 3D = bulk, nano shells? Actually nano shells are often considered 0D or 3D.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
One-dimensional (1D) nanostructures have two dimensions in the nanoscale and one dimension larger (e.g., length). Zero-dimensional (0D) are nanoparticles, 2D are thin films, 3D are bulk.

Step 2: Key Formula or Approach:
1D examples: nanowires, nanotubes, nanofibers, nanorods. Nano shells are hollow spherical structures (0D or 3D).

Step 3: Detailed Explanation:
- (A) Nano shells: spherical hollow particles – typically 0D or 3D, not 1D. - (B) Nanowires: long, thin – 1D. - (C) Nanotubes: cylindrical, length >> diameter – 1D. - (D) Fibres: elongated – 1D.
Thus, nano shells are not 1D.

Step 4: Final Answer:
Option (A) is correct.