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Coaxial Boron-Nitride/Carbon Nanotubes as a Potential Replacement for Double-Walled Carbon Nanotubes for High Strain Applications

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Recently fabricated coaxial Boron Nitride/Carbon nanotubes offer a potential replacement for double walled carbon nanotubes (DWCNTs) and boron nitride nanotubes (DWBNTs). However, an understanding of the mechanical response is imperative before using coaxial NTs for any device based application. In the present work, the buckling behavior of CNTs embedded within BNTs ([email protected]) and BNTs embedded within CNTs ([email protected]) under uniaxial compressive loading at 300 K is explored using molecular dynamics simulations. The nanotubes are modeled using the Tersoff three body potential, with the inter-wall interaction estimated using the Lennard-Jones potential. Our results identify a critical interlayer spacing corresponding to which the nanotubes display maximum buckling force and strain. Associated mechanism reveals an interesting radius and chirality dependent buckling behavior. The [email protected] nanotubes are found to be superior to others in terms of buckling strain, while exhibiting buckling strength comparable with DWCNTs. These superior properties make them a potential candidate for replacing DWCNTs in applications that demand large compressive strains. The inner CNTs of the [email protected] nanotubes act like a reinforcing agent, and therefore, these nanotubes have larger buckling strength than DWBNTs. However, their good buckling strength is marred by a substantial reduction in buckling strain, making them an inferior replacement for DWBNTs in applications requiring large-strains.
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Keywords: Buckling Strength; Coaxial Nanotubes; Molecular Dynamics

Document Type: Research Article

Affiliations: 1: Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, WB 721302, India 2: Department of Civil Engineering, University of California Los Angeles, CA 90095-1593, USA 3: Advanced Technology Development Center, Indian Institute of Technology Kharagpur, WB 721302, India 4: Department of Civil Engineering, Indian Institute of Science Bangalore, KA 560012, India

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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