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.

Capasso, A., Waclawik, E., Bell, J., Ruffell, S., Sgarlata, A., Scarselli, M.a., et al. (2010). Carbon nanotube synthesis from germanium nanoparticles on patterned substrates. JOURNAL OF NON-CRYSTALLINE SOLIDS, 356(37-40), 1972-1975 [10.1016/j.jnoncrysol.2010.05.041].

Carbon nanotube synthesis from germanium nanoparticles on patterned substrates

SGARLATA, ANNA;SCARSELLI, MANUELA ANGELA;DE CRESCENZI, MAURIZIO;
2010-06-17

Abstract

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.
17-giu-2010
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/03 - FISICA DELLA MATERIA
English
Carbon nanotubes; Germanium nanoparticles
Capasso, A., Waclawik, E., Bell, J., Ruffell, S., Sgarlata, A., Scarselli, M.a., et al. (2010). Carbon nanotube synthesis from germanium nanoparticles on patterned substrates. JOURNAL OF NON-CRYSTALLINE SOLIDS, 356(37-40), 1972-1975 [10.1016/j.jnoncrysol.2010.05.041].
Capasso, A; Waclawik, E; Bell, J; Ruffell, S; Sgarlata, A; Scarselli, Ma; DE CRESCENZI, M; Motta, N
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/25331
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