4-7 defect

A 4-7 defect is a structural anomaly found in carbon-based nanomaterials, such as graphene and carbon nanotubes. In a perfect structure, these materials consist of a two-dimensional lattice of carbon atoms arranged in hexagonal (6-membered) rings. A 4-7 defect occurs when this hexagonal pattern is disrupted, resulting in a four-membered and a seven-membered ring replacing two adjacent hexagonal rings.

Properties and effects

The presence of a 4-7 defect significantly alters the local geometry and electronic properties of the material. While these defects can disrupt the delocalized π electron system and affect the material's conductivity, they can also enhance the material's reactivity or binding capacity, making them beneficial for certain chemical applications.

See also

• Topological defect
• Carbon nanotube
• Graphene

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