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Transforming the tip of a mechanical pencil lead into a high-quality electron beam source  

Transforming the tip of a mechanical pencil lead into a high-quality electron beam source  

Nanocarbon materials with pointed geometries, such as graphene and carbon nanotubes, are considered promising candidates as sources for field emission electrons. However, their practical application remains limited due to difficulties in controlling the orientation and arrangement of these materials. 

Nanocarbon materials with pointed geometries, such as graphene and carbon nanotubes, are considered promising candidates as sources for field emission electrons. However, their practical application remains limited due to difficulties in controlling the orientation and arrangement of these materials. 

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