Thin film transistors using preferentially grown semiconducting single-walled carbon nanotube networks by water-assisted plasma-enhanced chemical vapor deposition

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Nearly perfect semiconducting single-walled carbon nanotube random network thin film transistors were fabricated and their reproducible transport properties were investigated. The networked single-walled carbon nanotubes were directly grown by water-assisted plasma-enhanced chemical vapor deposition. Optical analysis confirmed that the nanotubes were mostly semiconductors without clear metallic resonances in both the Raman and the UV-vis-IR spectroscopy. The transistors made by the nanotube networks whose density was much larger than the percolation threshold also showed no metallic paths. Estimation based on the conductance change of semiconducting nanotubes in the SWNT network due to applied gate voltage difference (conductance difference for on and off state) indicated a preferential growth of semiconducting nanotubes with an advantage of water-assisted PECVD. The nanotube transistors showed 10(-5) of on/off ratio and similar to 8 cm(2) V(-1) s(-1) of field effect mobility.
Publisher
IOP PUBLISHING LTD
Issue Date
2009-07
Language
English
Article Type
Article
Keywords

RAMAN-SCATTERING; TEMPERATURE; ARRAYS

Citation

NANOTECHNOLOGY, v.20, no.29

ISSN
0957-4484
DOI
10.1088/0957-4484/20/29/295201
URI
http://hdl.handle.net/10203/99104
Appears in Collection
PH-Journal Papers(저널논문)
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