p-Channel, n-Channel and ambipolar field-effect transistors based on functionalized carbon nanotube networks

Goh, Roland G.S., Bell, John M., Motta, Nunzio, Ho, Peter K-H., & Waclawik, Eric R. (2009) p-Channel, n-Channel and ambipolar field-effect transistors based on functionalized carbon nanotube networks. Superlattices and Microstructures, 46(1-2), pp. 347-356.

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We report on the transport properties of carbon nanotube network field-effect transistors (CNNFETs)produced from size-selected and functionalized single-walled carbon nanotubes (SWNTs). The SWNTs were functionalized by grafting octadecylamine chains to the tube-ends and spin casting onto prefabricated bottom gated silicon field-effect transistor substrates. Acid-oxidative cutting and centrifuge fractionation were employed to select the mean diameter and length of the SWNT bundles deposited within the active area of the CNNFETs. By comparing CNNFETs with different SWNT bundle thickness we demonstrated that thicker-bundle samples exhibited low on/off ratio but comparatively higher field-effect mobility than small-bundle samples which yielded devices with higher on/off ratio but lower field-effect mobility. Electronic transfer characteristics of the CNNFETs were dominated by the channel rather than contact resistance. These results demonstrate a potential new route for fabricating p- and n-type CNNFET devices.

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6 citations in Web of Science®

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ID Code: 17170
Item Type: Journal Article
Refereed: Yes
Additional Information: NanoSEA2008
Keywords: Carbon nanotubes, Single-walled carbon nanotubes, Carbon nanotub network field-effect transistors, Atomic force microscopy
DOI: 10.1016/j.spmi.2008.12.027
ISSN: 0749-6036
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > CONDENSED MATTER PHYSICS (020400) > Condensed Matter Physics not elsewhere classified (020499)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Engineering Systems
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2009 Elsevier Ltd.
Deposited On: 09 Jan 2009 03:12
Last Modified: 25 Oct 2013 02:02

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