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)

Date:	2011
Abstract:	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.
Grants:	European Commission 224594
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; Versió acceptada per publicar
Subject:	Nanoestructures ; Pel·lícules fines
Published in:	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

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3)
Articles > Published articles