Graphene is a two-dimensional material.
It consists of a single layer of carbon atoms arranged in a hexagonal lattice.
This structure gives graphene its unique properties.
These properties include high electrical and thermal conductivity, flexibility, and optical transparency.
4 Key Insights into Graphene's Dimensional Structure
1. Two-Dimensional Structure
Graphene is a single-atomic layer material.
Its thickness is just 0.34 nm.
The carbon atoms are tightly-packed in a honeycomb lattice.
The interatomic distance is 1.42 Å.
This two-dimensional arrangement is the fundamental reason for graphene's exceptional properties.
2. Unique Properties
Graphene's two-dimensional structure enables it to have a significant theoretical specific surface area (2630 m²/g).
It has ultrahigh electron mobility (~2 × 10⁵ cm²/Vs).
The Young’s modulus is high, at 1 TPa.
Thermal conductivity is exceptional, ranging from 3500–5000 W/mK.
Electrical conductivity is also remarkable, with a critical current density of 10⁸ A/cm².
3. Applications
Graphene's unique properties make it suitable for various applications.
These include electronics, composites, membranes, and next-generation renewable energy technologies (e.g., solar cells).
However, mass production of high-quality graphene with few or no contaminants or defects and large grain size at a reasonably low cost remains a challenge.
4. Production Methods
Various methods have been developed for graphene production.
These include mechanical exfoliation, liquid-phase exfoliation, sublimation of silicon carbide (SiC), and chemical vapor deposition (CVD).
CVD graphene refers to graphene produced by the CVD method, which differentiates it from other forms of graphene.
CVD is an effective method for obtaining quality graphene.
However, it can result in high sheet resistance, affecting the performance of organic electronic devices that use graphene-based transparent electrodes.
Continue Exploring, Consult Our Experts
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