A novel of self-standing nanotube-based cold cathode is described. The electron emitter is a single macroscopic fibre spun from neat single wall carbon nanotubes and consists of an ensemble of nanotube bundles held together by van der Waals forces. Field emission measurements carried out using two different types of apparatus demonstrated the long working life of the realised cathode. The system is able to emit at very high current densities, up to 13 A/cm(2), and shows very low values of both turn on and threshold field, 0.12 V/mu m and 0.21 V/mu m, respectively. Such easy to handle self-standing electron sources assure good performances and represent an enabling technology for a scalable production of cold cathodes. (C) 2012 Elsevier Ltd. All rights reserved.
Macroscopic self-standing SWCNT fibres as efficient electron emitters with very high emission current for robust cold cathodes / V., Guglielmotti; E., Tamburri; S., Orlanducci; M. L., Terranova; Rossi, Marco; S. B., Fairchild; B., Maruyama; N., Behabtu; C. C., Young; M., Pasquali. - In: CARBON. - ISSN 0008-6223. - STAMPA. - 52:(2013), pp. 356-362. [10.1016/j.carbon.2012.09.037]
Macroscopic self-standing SWCNT fibres as efficient electron emitters with very high emission current for robust cold cathodes
ROSSI, Marco;
2013
Abstract
A novel of self-standing nanotube-based cold cathode is described. The electron emitter is a single macroscopic fibre spun from neat single wall carbon nanotubes and consists of an ensemble of nanotube bundles held together by van der Waals forces. Field emission measurements carried out using two different types of apparatus demonstrated the long working life of the realised cathode. The system is able to emit at very high current densities, up to 13 A/cm(2), and shows very low values of both turn on and threshold field, 0.12 V/mu m and 0.21 V/mu m, respectively. Such easy to handle self-standing electron sources assure good performances and represent an enabling technology for a scalable production of cold cathodes. (C) 2012 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
