Question

Which is not an example of 2D material?

• A. hBN (Hexagonal boron nitride)
• B. \(\text{MoS}_2\) (Molybdenum disulfide)
• C. GO (Graphene oxide)
• D. ZnO (Zinc oxide)

Hint:

Common 2D materials include graphene, graphene oxide, hBN and \(\text{MoS}_2\).

Answer 1

The Correct Option is D

Concept:
Two-dimensional materials have thickness of only one or few atomic layers and show special electronic, optical and mechanical properties.

Step 1: Check hBN.
Hexagonal boron nitride is a well-known 2D material. \[ (A) \text{ is a 2D material} \]

Step 2: Check \(\text{MoS}_2\).
Molybdenum disulfide belongs to transition metal dichalcogenides and is a common 2D material. \[ (B) \text{ is a 2D material} \]

Step 3: Check GO.
Graphene oxide is derived from graphene and is considered a 2D material. \[ (C) \text{ is a 2D material} \]

Step 4: Check ZnO.
Zinc oxide is generally treated as a bulk oxide semiconductor material in this context and is not the standard example of a 2D material among the given options. \[ (D) \text{ is not the correct example} \] \[ \therefore \text{Correct Answer is (D)} \]