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Growth dynamics of inner tubes inside cobaltocene-filled single-walled carbon nanotubes

Authors/others:Kharlamova, M. V.Kramberger, ChristianSaito, Takeshi (National Institute of Advanced Industrial Science and Technology) Shiozawa, HidetsuguPichler, Thomas
Abstract:We have synthesized cobaltocene-filled 1.7-nm-mean diameter single-walled carbon nanotubes (SWCNTs) and transformed them into double-walled carbon nanotubes by annealing at temperatures between 500 and 1000 °C for 2 h in vacuum. We analyze the temperature-dependent inner tube growth inside the filled SWCNTs by Raman spectroscopy. The changes in intensity of the Raman peaks of inner tubes with the diameters ranging from 0.832 to 1.321 nm with increasing annealing temperature are traced. It is revealed that the growth temperatures of larger diameter inner tubes are higher than the ones of smaller diameter tubes. A decrease in the diameter of the inner tubes by ~0.4 nm leads to a decrease in the growth temperature by ~200 °C.
Number of pages:8
Date of publication:1.8.2016
Journal title:Applied Physics A: materials science & processing
Digital Object Identifier (DOI):http://dx.doi.org/10.1007/s00339-016-0282-6
Publication Type:Article
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