2D Material Definition
Two-dimensional (2D) materials are crystals with thicknesses of only one or a few atoms. They exhibit unique physical and chemical properties compared to their bulk counterparts due to quantum confinement effects.
Evaluating Material Options
Let's analyze each option to determine which is not typically considered a 2D material:
- hBN (Hexagonal boron nitride): Often called "white graphene," hBN is a single-layer material structurally similar to graphene and is a well-known 2D material.
- MoS$_2$ (Molybdenum disulfide): This is a transition metal dichalcogenide. Single-layer and few-layer MoS$_2$ are widely studied as 2D semiconductor materials.
- GO (Graphene oxide): Derived from graphene, graphene oxide retains a 2D structure, although it contains oxygen functional groups. It's considered within the scope of 2D materials research.
- ZnO (Zinc oxide): While ZnO can be fabricated into thin films, nanowires, or nanoparticles, its fundamental form is a bulk semiconductor. It is not inherently a layered structure like graphene or hBN that easily exfoliates into 2D sheets. Therefore, it is not typically classified alongside graphene, hBN, and MoS$_2$ as a quintessential 2D material.
Conclusion
Based on the analysis, Zinc oxide (ZnO) is the material among the options that is not fundamentally classified as a 2D material.
Similar Questions
- Find the lattice parameter '$a$' for a simple cubic crystal refracting an X Ray ($\lambda = 1.54$ $\text{\AA}$) at an angle $45^\circ$ from a plane having miller indices (1, 1, 0) at order (n= 1).
- The expression $C_V = 3R$ represents :
- A steel wire of length $2.5\text{ m}$ and area of cross-section $2.5 \times 10^{-6}\text{ m}^2$ is suspended from torsion head. A $5\text{ kg}$ weight is suspended at its face end, find the change in length of wire ($\Delta L$). (Given $Y=2\times 10^{11}\text{ N/m}^2$)
- Which of the following relation gives the potential energy of a diatomic molecule ?
- The packing fraction of face centered cubic (fcc) lattice is :
- The electrical conductivity of a metal $\sigma$ is give by :
- The direct lattices are given by $a_1 = (\hat{j} + \hat{k})$, $a_2 = (3\hat{i} - 2\hat{k})$ and $a_3 = (4\hat{i} + 3\hat{j})$, find out the reciprocal lattices $b_1$, $b_2$ and $b_3$.
- The shortest wavelength present in the X-rays at an accelerating potential of 50 KV is :
- Among the following which one term does not represent Gibbs free energy ?
- For an ideal hcp structure, where the atomic spheres touch each other, the ration of $\frac{c}{a}$ is :
Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
