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Axial buckling and compressive behavior of nickel-encapsulated multiwalled carbon nanotubes

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Title Axial buckling and compressive behavior of nickel-encapsulated multiwalled carbon nanotubes
 
Creator MISRA, A
TYAGI, PK
RAI, P
MAHOPATRA, DR
GHATAK, J
SATYAM, PV
AVASTHI, DK
MISRA, DS
 
Subject high-pressure
large-strain
single
stiffness
 
Description 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.
 
Publisher AMER PHYSICAL SOC
 
Date 2011-07-16T20:02:09Z
2011-12-26T12:49:56Z
2011-12-27T05:35:46Z
2011-07-16T20:02:09Z
2011-12-26T12:49:56Z
2011-12-27T05:35:46Z
2007
 
Type Article
 
Identifier PHYSICAL REVIEW B, 76(1), -
1098-0121
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
 
Language en