Growth of branched carbon nanotubes with doped/un-doped intratubular junctions by one-step co-pyrolysis

Branched CNTs with nitrogen doped/un-doped intratubular junctions have been synthesized by a simple one-step co-pyrolysis of hexamethylenetetramine and benzene. The difference in the vapor pressure and the insolubility of the precursors are the keys for the formation of the branched intratubular jun...

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Bibliographic Details
Published in:Carbon (New York) 2013-05, Vol.56, p.97-102
Main Authors: Goswami, G.K., Nandan, Ravi, Nanda, K.K.
Format: Article
Language:English
Subjects:
Benzene
Branched
Carbon
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Field effect transistors
Hexamethylenetetramine
Keys
Materials science
Nanoscale materials and structures: fabrication and characterization
Nanotubes
P-type semiconductors
Physics
Precursors
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Summary:Branched CNTs with nitrogen doped/un-doped intratubular junctions have been synthesized by a simple one-step co-pyrolysis of hexamethylenetetramine and benzene. The difference in the vapor pressure and the insolubility of the precursors are the keys for the formation of the branched intratubular junctions. The junctions behave like Schottky diodes with nitrogen-doped portion as metal and un-doped portion as p-type semiconductor. The junctions also behave like p-type field effect transistors with a very large on/off ratio.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2012.12.079