CVD graphene, or chemical vapor deposition graphene, is a material that is typically just one atomic layer thick.
This layer is approximately 0.34 nanometers in thickness.
CVD graphene is produced as a single layer of carbon atoms arranged in a hexagonal lattice structure.
The process of chemical vapor deposition (CVD) allows for the growth of this material on various substrates.
Copper is particularly effective for producing large-area, uniform single-layer graphene films.
5 Key Points Explained
1. Single-Layer Nature
The single-layer nature of CVD graphene is crucial for its unique properties.
These properties include high electrical and thermal conductivity, flexibility, and optical transparency.
2. CVD Process
The CVD process involves the deposition of carbon atoms from a gas phase onto a substrate.
This forms a continuous film of graphene.
The uniformity and thickness of the graphene layer are critical for its performance in various applications.
3. Uniformity and Advancements
In some cases, CVD graphene may not be perfectly uniform, resulting in a mixture of monolayer and few-layer regions (polygraphene).
Advancements in CVD techniques, such as the use of copper substrates and precise control of the cooling rate, have improved the production of uniform single-layer graphene.
For instance, a study reported in 2009 demonstrated the preparation of large-area graphene films on copper foils that were mostly single-layer, with less than 5% double or triple layers.
4. Electrical Properties
The thickness of CVD graphene is also important for its electrical properties.
For example, the sheet resistance of undoped graphene is approximately 6 kΩ with 98% transparency for a single layer.
When synthesized by CVD on copper, the sheet resistance can be as low as 350 Ω/sq with 90% transparency.
This indicates the potential of CVD graphene for use in transparent conductive films.
5. Applications and Future
The thickness of the graphene film directly affects its sheet resistance, with each additional layer reducing the resistance.
In summary, CVD graphene is typically a single atomic layer thick, about 0.34 nm, and its production involves careful control of the CVD process to ensure uniformity and quality.
The thickness of CVD graphene is fundamental to its properties and performance in various applications.
Advancements in CVD techniques continue to improve the consistency and quality of the material.
Continue exploring, consult our experts
Discover the cutting-edge science of CVD graphene with KINTEK SOLUTION.
Experience the unparalleled electrical and thermal conductivity, flexibility, and optical transparency of our premium single-atomic layer films.
Embrace the future of electronics and transparent conductive materials with our precision-engineered CVD graphene.
Explore our innovative CVD graphene products and elevate your research today!
