Aligned Carbon Nanotube Stacks by Water-Assisted Selective Etching

Well-aligned, high-purity carbon nanotube (CNT) stacks of up to 10 layers fabricated in one batch process have been formed by water-assisted selective etching of carbon atoms. Etching takes place at the CNT caps as well as at the interface between CNTs and metal catalyst particles. This simple proce...

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Bibliographic Details
Published in:Nano letters 2005-12, Vol.5 (12), p.2641-2645
Main Authors: Zhu, Lingbo, Xiu, Yonghao, Hess, Dennis W, Wong, Ching-Ping
Format: Article
Language:English
Subjects:
Anisotropy
Chemical synthesis methods
Cross-disciplinary physics: materials science
rheology
Crystallization - methods
Exact sciences and technology
Materials science
Materials Testing
Membranes, Artificial
Methods of nanofabrication
Molecular Conformation
Nanoscale materials and structures: fabrication and characterization
Nanotechnology - methods
Nanotubes
Nanotubes, Carbon - chemistry
Nanotubes, Carbon - ultrastructure
Particle Size
Physics
Surface Properties
Water - chemistry
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Summary:Well-aligned, high-purity carbon nanotube (CNT) stacks of up to 10 layers fabricated in one batch process have been formed by water-assisted selective etching of carbon atoms. Etching takes place at the CNT caps as well as at the interface between CNTs and metal catalyst particles. This simple process generates high-purity CNTs and opens the CNT ends by removing the nanotube caps. High-resolution transmission electron microscopy indicates that the process does not damage CNT wall structures. A mechanism for stacked growth of CNT layers is proposed.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl051906b