Carbon nanotube synthesis from germanium nanoparticles on patterned substrates

Capasso, Andrea, Waclawik, Eric R., Bell, John M., Ruffell, Simon, Sgarlata, Anna, Scarselli, Manuela, De Crescenzi, Maurizio, & Motta, Nunzio (2010) Carbon nanotube synthesis from germanium nanoparticles on patterned substrates. Journal of Non-Crystalline Solids, 356(37-40), pp. 1972-1975.

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Controlled synthesis of carbon nanotubes (CNTs) is highly desirable for nanoelectronic applications. To date, metallic catalyst particles have been deemed unavoidable for the nucleation and growth of any kind of CNTs. Ordered arrays of nanotubes have been obtained by controlled deposition of the metallic catalyst particles. However, the presence of metal species mixed with the CNTs represents a shortcoming for most electronic applications, as metal particles are incompatible with silicon semiconductor technology. In the present paper we report on a metal-catalyst-free synthesis of CNTs, obtained through Ge nanoparticles on a Si(001) surface patterned by nanoindentation. By using acetylene as the carbon feed gas in a low-pressure Chemical Vapor Deposition (CVD) system, multi-walled carbon nanotubes (MWNT) have been observed to arise from the smallest Ge islands. The CNTs and the Ge three-dimensional structures have been analysed by SEM, EDX and AFM in order to assess their elemental features and properties. EDX and SEM results allow confirmation of the absence of any metallic contamination on the surface, indicating that the origin of the CNT growth is due to the Ge nanocrystals.

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ID Code: 34123
Item Type: Journal Article
Refereed: Yes
Additional Information: Joint Conferences on Advanced Materials: Functional and Nanonstructured Materials – FNMA’09; Intermolecular and Magnetic Interactions in Matter – IMIM’09
Keywords: carbon nanotubes, germanium, self-assembly, nanoindentation, cvd, patterning
DOI: 10.1016/j.jnoncrysol.2010.05.041
ISSN: 0022-3093
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > CONDENSED MATTER PHYSICS (020400) > Surfaces and Structural Properties of Condensed Matter (020406)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanofabrication Growth and Self Assembly (100706)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanomaterials (100708)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright © 2010 Elsevier B.V.
Copyright Statement: This is the author’s version of a work that was accepted for publication in Journal of Non-Crystalline Solids. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Non-Crystalline Solids, [VOL 356, ISSUE 37-40, (2010)] DOI: 10.1016/j.jnoncrysol.2010.05.041
Deposited On: 17 Aug 2010 05:06
Last Modified: 23 Oct 2013 01:37

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