Synthesis of vertically-aligned carbon nanotubes without a catalyst by hydrogen arc discharge

Autor:	Chang Liu, Xingke Cai, Hongtao Cong
Rok vydání:	2012
Předmět:	Materials science Hydrogen Analytical chemistry chemistry.chemical_element General Chemistry Carbon nanotube Catalysis law.invention Electric arc X-ray photoelectron spectroscopy chemistry law Electrode General Materials Science Graphite Corona discharge
Zdroj:	Carbon. 50:2726-2730
ISSN:	0008-6223
DOI:	10.1016/j.carbon.2012.02.031
Popis:	Vertically-aligned carbon nanotubes (CNTs) were prepared by hydrogen arc discharge, using pure graphite powder as carbon source without catalysts added. Scanning and transmission electron microscopy characterizations show that the aligned CNTs have a bamboo-like structure, and their lengths and diameters are about 30 mu m and 40-60 nm, respectively. No metallic impurities can be detected in the samples by careful X-ray photoelectron spectroscopy detection. The activation of hydrogen radicals, the heating effect of the arc, and the electric field surrounding the arc column area are considered to play important roles for the non-catalyst growth of the CNTs. (C) 2012 Elsevier Ltd. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::26b401d7818d868601858d960ca1b757 https://doi.org/10.1016/j.carbon.2012.02.031 Zobrazit plný text záznamu Full Text from ScienceDirect