1. Highly Efficient Vertical Growth of Wall-Number-Selected, N-Doped Carbon Nanotube Arrays.
- Author
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Duck Hyun Lee, Won Jong Lee, and Sang Ouk Kim
- Subjects
- *
CARBON nanotubes , *SEMICONDUCTOR doping , *IRON catalysts , *BLOCK copolymers , *CHEMICAL templates , *ELECTRIC conductivity , *NANOELECTRONICS - Abstract
We demonstrate a straightforward approach for rapid growth of wall-number selected, N-doped CNT arrays. Highly uniform nanopatterned iron catalyst arrays were prepared by tilted deposition through block copolymer nanotemplates. PECVD growth of CNTs from the nanopatterned catalysts in an NH3environment generated vertical N-doped CNTs with a fine-tunability of their carbon wall numbers. The optimized growth conditions produced 52 μm long N-doped CNTs within 1 min. Owing to N-doping, the wall-number selected CNTs including DWNTs and TWNTs demonstrated enhanced electro-conductivity and chemical functionality. This remarkably fast growth of highly uniform N-doped CNTs, whose material properties and chemical functionalizability are reinforced by N-doping, offers a new area of large-scale nanofabrication, potentially useful for diverse nanodevices. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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