Structural and magnetic characterization of batch-fabricated nickel encapsulated multi-walled carbon nanotubes
Zeeshan, M. Arif (Institute of Robotics and Intelligent Systems)
Shou, Kaiyu (Institute of Robotics and Intelligent Systems)
Pané i Vidal, Salvador (Institute of Robotics and Intelligent Systems)
Pellicer Vilà, Eva Maria (Universitat Autònoma de Barcelona. Departament de Física)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Sivaraman, K. M. (Institute of Robotics and Intelligent Systems)
Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física)
Nelson, Bradley J. (Institute of Robotics and Intelligent Systems)

Fecha:	2011
Resumen:	We report on the growth and fabrication of Ni-filled multi-walled carbon nanotubes (Ni-MWNTs) with an average diameter of 115 nm and variable length of 400 nm-1μm. The Ni-MWNTs were grown using template-assisted electrodeposition and low pressure chemical vapor deposition (LPCVD) techniques. Anodized alumina oxide (AAO) templates were fabricated on Si using a current controlled process. This was followed by the electrodeposition of Ni nanowires (NWs) using galvanostatic pulsed current (PC) electrodeposition. Ni NWs served as the catalyst to grow Ni-MWNTs in an atmosphere of H2/C2H2 at a temperature of 700º C. Time dependent depositions were carried out to understand the diffusion and growth mechanism of Ni-MWNTs. Characterization was carried out using scanning electron microscopy (SEM), focused ion beam (FIB) milling, transmission electron microscopy (TEM), Raman spectroscopy and energy dispersive x-ray spectroscopy (EDX). TEM analysis revealed that the Ni nanowires possess a fcc structure. To understand the effects of the electrodeposition parameters, and also the effects of the high temperatures encountered during MWNT growth on the magnetic properties of the Ni-MWNTs, vibrating sample magnetometer (VSM) measurements were performed. The template-based fabrication method is repeatable, efficient, enables batch fabrication and provides good control on the dimensions of the Ni-MWNTs.
Ayudas:	European Commission 224594
Derechos:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Lengua:	Anglès
Documento:	Article ; Versió acceptada per publicar
Materia:	Nanoestructures ; Pel·lícules fines
Publicado en:	Nanotechnology, Vol. 22, No. 27 (Jul. 2011) , p. 275713/1-275713/10, ISSN 1361-6528

DOI: 10.1088/0957-4484/22/27/275713

Post-print 24 p, 2.3 MB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Grupo de nanoingeniería de materiales, nanomagnetismo y nanomecánica (Gnm3)
Artículos > Artículos publicados