Title

Synthesis And Characterization Of Radially-Aligned Carbon Filaments Spontaneously Grown On A Carbon Yarn

Keywords

Carbon filaments; Carbon yarn; Catalyst; Hydrocarbons; Microstructure

Abstract

The synthesis and characterization of radially-aligned carbon filaments (RACF) produced from light hydrocarbons are reported. RACF grow spontaneously on the surface of a resistively heated (1100-1700 °C) carbon yarn exposed to C 1-C 3 hydrocarbons (methane, ethylene, propane) as carbon precursors. The diameter of the RACF depends on the temperature, exposure time, nature of hydrocarbon, and it ranges from 700 nm to 40 μm, with the length of the carbon filaments reaching up to 800 μm. The morphology and microstructure of the produced carbon filaments were analyzed by a number of materials characterization techniques, and it was shown that they feature a tree-ring type structure made of turbostratic carbon layers. RACF are characterized by the presence of cracks (50-100 nm in width) between the consecutive "tree-rings" and a crenulated structure of the exterior surface of the filaments. The RAFC growth mechanism is yet to be fully understood. Pros and cons for the catalytic versus non-catalytic growth models for the RACF are discussed in the paper. Copyright © 2008 American Scientific Publishers All rights reserved.

Publication Date

9-1-2008

Publication Title

Journal of Nanoscience and Nanotechnology

Volume

8

Issue

9

Number of Pages

4424-4431

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1166/jnn.2008.282

Socpus ID

55849122298 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/55849122298

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