Carbon nanotube vs carbon nanofiber

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Carbon nanofibers (CNFs) are distinct from carbon nanotubes, primarily characterized by their larger diameters, typically ranging from tens to hundreds of nanometers, compared to the atomic-scale dimensions of carbon nanotubes, which can be just a few nanometers wide. CNFs are cylindrical nanostructures featuring graphene layers that can be arranged in various configurations, such as stacked cones, cups, or plates. In contrast, carbon nanotubes are defined by their perfect cylindrical structure. The discussion highlights the nuanced differences between these two forms of carbon nanostructures, emphasizing their structural characteristics and size variations.
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I understand what a carbon nanotube is. I have some experience with geodesic domes and the way those shapes can be changed. I keep hearing more and more about carbon nanofibers but I've never seen it explained. Is a carbon nanofiber a bundle of nanotubes, chains of carbon particles or something different.

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I think carbon nanofibers are actually carbon nanontubes with imperfect cylindricity.
 
perhaps my impression is incorrect, but, to me, a carbon nanotube can have atomic-scale dimensions (diameters up to, say a few nanometers) while a nanofiber is typically larger (diameters in the tens to hundreds of nanometers).
 
Carbon nanofibers (CNFs), vapor grown carbon fibers (VGCFs), or vapor grown carbon nanofibers (VGCNFs) are cylindric nanostructures with graphene layers arranged as stacked cones, cups or plates.

Carbon nanofibers with graphene layers wrapped into perfect cylinders are called carbon nanotubes.

First sentancte of the wikipedia article on Carbon Nanofiber
 
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