Carbon:nickel nanocomposite templates - predefined stable catalysts for diameter-controlled growth of single-walled carbon nanotubes
Carbon:nickel nanocomposite templates - predefined stable catalysts for diameter-controlled growth of single-walled carbon nanotubes
Melkhanova, S.; Kunze, T.; Haluska, M.; Hübner, R.; Keller, A.; Abrasonis, G.; Gemming, S.; Krause, M.
Abstract
Carbon: nickel (C:Ni) nanocomposite templates (NCTs) were used as catalyst precursors for diameter-controlled growth of single-walled carbon nanotubes (SWCNTs) by chemical vapor deposition (CVD). Two NCT types of 2 nm thickness were prepared by ion beam co-sputtering without (type I) or with assisting Ar+ ion irradiation (type II). NCT type I comprised Ni-rich nanoparticles (NPs) with defined diameter in an amorphous carbon matrix, while NCT type II was a homogenous C:Ni film. Based on the Raman spectra of more than 600 individual SWCNTs, the diameter distribution obtained from both types of NCT was determined. SWCNTs with a selective, monomodal diameter distribution are obtained from NCT type I. About 50% of the SWCNTs have a diameter of (1.36 ± 0.10) nm. In contrast to NCT type I, SWCNTs with a non-selective, relatively homogeneous diameter distribution are obtained from NCT type II. From both catalyst templates predominantly separated as-grown SWCNTs are obtained. They are free of solvents or surfactants, exhibit a low degree of bundling and contain negligible amounts of MWCNTs. The study demonstrates the advantage of predefined catalysts for diameter-controlled SWCNT synthesis in comparison to in situ formed catalysts.
Keywords: Nanocomposites; single-walled carbon nanotubes; diameter selective growth; predifined stable catalyst templates
Beteiligte Forschungsanlagen
- Ionenstrahlzentrum DOI: 10.17815/jlsrf-3-159
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-3-159 is cited by this (Id 23078) publication
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Nanoscale 8(2016), 14888-14897
DOI: 10.1039/c5nr06972f
Cited 9 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-23078