Department of Applied Physics, Delhi Technological University, Delhi 110042, India
Adv. Mater. Lett., 2016, 7 (3), pp 197-200
DOI: 10.5185/amlett.2016.6150
Publication Date (Web): Feb 01, 2016
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E-mail: pawan.phy@dce.edu
In this report, we have illustrated the synthesis of the Ni-filled multiwalled carbon nanotubes (MWCNTs) on both metallic and non-metallic substrates, by using thermal CVD technique. Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) have been used to characterize the surface morphology and crystalline nature of the MWCNTs encapsulated with Ni nanorod. These filled MWCNTs have exhibited strong magnetic response due to encapsulation of pure phase of Ni. Magnetic Force Microscopy (MFM) study of such filled tubes reveals the pole formation in the Ni nanorod and confirms magnetization direction perpendicular to tube axis. Filling occurs in a fragmented manner confirmed by MFM and each fragment found to have north and south poles along the axis perpendicular to the tube i.e. radial direction of tube.
Carbon nanotubes, thermal CVD, magnetic force microscopy (MFM), magnetization direction.
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