Ultra-high-yield growth of vertical single-walled carbon nanotubes: Hidden roles of hydrogen and oxygen
- 8 November 2005
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 102 (45), 16141-16145
- https://doi.org/10.1073/pnas.0507064102
Abstract
An oxygen-assisted hydrocarbon chemical vapor deposition method is developed to afford large-scale, highly reproducible, ultra-high-yield growth of vertical single-walled carbon nanotubes (V-SWNTs). It is revealed that reactive hydrogen species, inevitable in hydrocarbon-based growth, are damaging to the formation of sp(2)-like SWNTs in a diameter-dependent manner. The addition of oxygen scavenges H species and provides a powerful control over the C/H ratio to favor SWNT growth. The revelation of the roles played by hydrogen and oxygen leads to a unified and universal optimum-growth condition for SWNTs. Further, a versatile method is developed to form V-SWNT films on any substrate, lifting a major substrate-type limitation for aligned SWNTs.Keywords
This publication has 17 references indexed in Scilit:
- Vertically aligned carbon nanofibers and related structures: Controlled synthesis and directed assemblyJournal of Applied Physics, 2005
- Water-Assisted Highly Efficient Synthesis of Impurity-Free Single-Walled Carbon NanotubesScience, 2004
- Preferential Growth of Semiconducting Single-Walled Carbon Nanotubes by a Plasma Enhanced CVD MethodNano Letters, 2004
- Generalized Chemical Reactivity of Curved Surfaces: Carbon NanotubesNano Letters, 2003
- Spinning continuous carbon nanotube yarnsNature, 2002
- Carbon nanotubes: opportunities and challengesSurface Science, 2001
- Self-Oriented Regular Arrays of Carbon Nanotubes and Their Field Emission PropertiesScience, 1999
- Synthesis of Large Arrays of Well-Aligned Carbon Nanotubes on GlassScience, 1998
- Large-Scale Synthesis of Aligned Carbon NanotubesScience, 1996
- Mass and optical emission spectroscopy of plasmas for diamond synthesisPure and Applied Chemistry, 1994