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Controlled growth and characterization of two-dimensional single-walled carbon-nanotube networks for electrical applications

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Edgeworth, Jonathan P., Wilson, Neil R. and Macpherson, Julie V. (2007) Controlled growth and characterization of two-dimensional single-walled carbon-nanotube networks for electrical applications. Small, Vol.3 (No.5). pp. 860-870. doi:10.1002/smll.200700029 ISSN 1613-6810.

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Official URL: http://dx.doi.org/10.1002/smll.200700029

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Abstract

We demonstrate the reproducible fabrication of single-walled carbon nanotube (SWNT) networks, via catalyzed chemical vapor deposition (cCVD). Fe nanoparticles are employed as the catalyst, with methane as the carbon-containing gas. cCVD growth under these conditions results in the formation of multiply interconnected, random, two-dimensional networks of SWNTs. Investigation of the effect of parameters such as methane flow rate and temperature on the growth process enables control over the density of the network, which controls the network conductivity. Low-density networks demonstrate p-type semiconductor behavior, whilst high-density networks exhibit semimetallic behavior. In both cases conductance is demonstrated over macroscopic length scales, up to millimeters, much longer than the individual SWNTs, despite the surface coverage being < 1 %. The networks can be defined in regions of a surface by photolithography before or after growth. Controlled growth of SWNT networks thus enables the application of SWNTs as macroscale conductors with controllable, predictable, and reproducible characteristics.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology
T Technology > TA Engineering (General). Civil engineering (General)
Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Chemistry
Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Small
Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
ISSN: 1613-6810
Official Date: May 2007
Dates:
DateEvent
May 2007Published
Volume: Vol.3
Number: No.5
Number of Pages: 11
Page Range: pp. 860-870
DOI: 10.1002/smll.200700029
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

Data sourced from Thomson Reuters' Web of Knowledge

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