**5. Mass production of vapor-grown carbon nanofibers (VGCFs)**

On account of their unique properties, for example, high strength and electric conductivity and special functional properties, researchers have indicated a lot of consideration for the large scale manufacturing of these materials.


Carbon nanofibers were manufactured with diameters of 50–80 nm from catalytic decomposition of hydrocarbon gas with catalyst metal powder utilizing the support catalyst method. In spite of the fact that the support catalyst technique can create high quality fibers, the preparation and defined scattering of ultrafine catalyst particles are very difficult and are exceptionally troublesome, the yield of this strategy is spendthrift to be in any way marketed. So as to tackle the above issues the floating catalyst technique was created with the help of support catalyst to deliver carbon nanofibers with diameter of 50–100 nm.
