DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/4516

Title: Axial buckling and compressive behavior of nickel-encapsulated multiwalled carbon nanotubes
Authors: MISRA, A
TYAGI, PK
RAI, P
MAHOPATRA, DR
GHATAK, J
SATYAM, PV
AVASTHI, DK
MISRA, DS
Keywords: high-pressure
large-strain
single
stiffness
Issue Date: 2007
Publisher: AMER PHYSICAL SOC
Citation: PHYSICAL REVIEW B, 76(1), -
Abstract: In a recent report [Sun , Science 312, 1119 (2006)], the partially filled material inside multiwalled carbon nanotubes (MWNTs) was shown to have shrunk and deformed in the axial direction under 300 kV electron irradiation. In this experiment, 100 MeV Au7+ ion irradiation was performed to study the deformation and defects in uniformly nickel filled MWNTs with high-resolution transmission electron microscopy and Raman spectroscopy. We propose that high-pressure induced torsion in confined nickel could possibly result in successive compressions and expansions of the tubes, leading to axial buckling of MWNTs. The tangential Raman G band systematically upshifts as the ion fluence increases, attributed to the torsional strain. In contrast to a square root dependence of the buckling wavelength (lambda) on the radius (r) and thickness (t) of the tubes [lambda=3.5(rt)(1/2)], as predicted by theoretical models, the exponential fit of the data that assumes lambda proportional to e(root(r/t)) also produces an excellent fit.
URI: http://dx.doi.org/10.1103/PhysRevB.76.014108
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4516
http://hdl.handle.net/10054/4516
ISSN: 1098-0121
Appears in Collections:Article

Files in This Item:

File SizeFormat
275.pdf248.94 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback