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We report the optical and structural properties of nitrogenated Cylinder ?shape
carbon nanofibers prepared by DC plasma CVD system at low deposition
temperature. Cylinder-shape graphene sheathed vertically aligned carbon nanofibers
(V-CNFs) with metal tips have been synthesized by DC plasma chemical vapor deposition
gases at room temperature. For nitrogen plasma treatment, we used
) 20 sccm by using microwave surface wave plasma. During the experiment
microwave power was fixed at 500 W and chamber vacuum pressure is fixed about 8 ?10
Pa. The pulse frequency was fixed at 500 Hz and duty was fixed at 50%. The nanofibers
grown on Ni-coated Cu substrates were studied by scanning electron microscopy, high-
resolution transmission electron microscopy, XPS and Raman measurements. The CNF?s
are composed of cylindrical pure graphite sheets, and have nanometer?sized tips and
roots. The nitrogen plasma treatment affects causes nitrogen chemical etching on the
graphene sheathed carbon nanofibers. N
-plasma treatment effect on graphene sheathed
carbon nanofibers also found with unique composition of multiwall graphitic latic with
Accordingly, (HR-TEM) images of nitrogen plasma treated and non-treated CNFs
exhibit similar fibril morphology with 20-40 nm diameters and > 5 μm length. Suitable
structural difference are found between nitrogen plasma treated and non-treated CNFs.
Disruptions and irregular curve in graphene stacking in N-plasma treated CNFs contain
more dislocations and discursions in the graphene stacking (turbo static disorder). It
is due to the propensity of incorporated nitrogen to form pentagonal defects in the
graphene sheets. The detailed of all the experimental results and complete analysis will
be presented during the presentation.
Dr. Dilip Chandra Ghimire , Research Professor in Chubu University Aichi Japan and PhD from Florida
USA and conducting postdoctoral studies in Chubu University School of Electrical and Electronics
Engineering. He has published more than 25 papers in reputed journals.
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