The present communication deals with the coating of bundles of single wall carbon nanotube (SWCNTs) by nanocrystalline tantalum pentoxide (Ta 2O5) deposits. Arrays of SWCNTs bundles are produced on Si and A1N plates by means of a Hot Filament CVD apparatus, using as reactants carbon nanopowders and in-situ produced atomic hydrogen. A subsequent process, carried out in an O2-rich atmosphere, enables to cover the bundles by a uniform deposit of Ta2O5nanograms. The coating process does not modify the organization of the pristine nanotube deposits. A series of SWCNT/Ta2O5samples, characterized from both the morphological and structural point of view, have been tested as cathodes in Field Emission experiments (F.E.). The F.E. experiments proved that these hybrid SWCNT/dielectric systems are good field emitters and that their properties make them suitable for the realization of cold cathodes. © The Electrochemical Society.
Preparation and functional characterizations of Ta2O5 deposits organized at the micro- and nano-scale / M. L., Terranova; V., Guglielmotti; S., Orlanducci; V., Sessa; E., Tamburri; Rossi, Marco. - In: ECS TRANSACTIONS. - ISSN 1938-5862. - STAMPA. - 25:8 PART 2(2009), pp. 1153-1157. (Intervento presentato al convegno 17th International Chemical Vapor Deposition Symposium (CVD-XVII) - 216th Meeting of the Electrochemical Society tenutosi a Vienna nel 4 October 2009 through 9 October 2009) [10.1149/13207719].
Preparation and functional characterizations of Ta2O5 deposits organized at the micro- and nano-scale
ROSSI, Marco
2009
Abstract
The present communication deals with the coating of bundles of single wall carbon nanotube (SWCNTs) by nanocrystalline tantalum pentoxide (Ta 2O5) deposits. Arrays of SWCNTs bundles are produced on Si and A1N plates by means of a Hot Filament CVD apparatus, using as reactants carbon nanopowders and in-situ produced atomic hydrogen. A subsequent process, carried out in an O2-rich atmosphere, enables to cover the bundles by a uniform deposit of Ta2O5nanograms. The coating process does not modify the organization of the pristine nanotube deposits. A series of SWCNT/Ta2O5samples, characterized from both the morphological and structural point of view, have been tested as cathodes in Field Emission experiments (F.E.). The F.E. experiments proved that these hybrid SWCNT/dielectric systems are good field emitters and that their properties make them suitable for the realization of cold cathodes. © The Electrochemical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
