Journal ArticleDOI
Compressibility and Polygonization of Single-Walled Carbon Nanotubes under Hydrostatic Pressure
Jie Tang,Lu Chang Qin,Taizo Sasaki,Masako Yudasaka,Akiyuki Matsushita,Sumio Iijima,Sumio Iijima +6 more
TLDR
Theoretical calculations suggest that single-walled carbon nanotubes are polygonized when they form bundles of hexagonal close-packed structure and the intertubular gap is smaller than the equilibrium spacing of graphite.Abstract:
Single-walled carbon nanotubes show linear elasticity under hydrostatic pressure up to 1.5 GPa at room temperature. The volume compressibility, measured by in situ synchrotron x-ray diffraction, has been determined to be $0.024\mathrm{GPa}{}^{\ensuremath{-}1}$. Theoretical calculations suggest that single-walled carbon nanotubes are polygonized when they form bundles of hexagonal close-packed structure and the intertubular gap is smaller than the equilibrium spacing of graphite (002) $(d\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}3.35\phantom{\rule{0ex}{0ex}}\AA{})$. It has also been determined that the deformation of the trigonal nanotube lattice under hydrostatic pressure is reversible up to 4 GPa, beyond which the nanotube lattice is destroyed.read more
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Journal ArticleDOI
Mechanical properties of defective single wall carbon nanotubes
TL;DR: In this paper, first principle density functional theory calculations for radially deformed and defective single wall (8,0) carbon nanotube are reported, and structural changes in terms of radial cross-sectional geometry and bond length are studied for different values of the applied strain for all types of investigated deformations and defects.
Book ChapterDOI
Interfacial Mechanical Behaviors in Carbon Nanotube Assemblies
TL;DR: In this article, the authors assess the mechanical properties of individual CNTs and CNT bundles, the inter-layer or inter-shell mechanics in multi-walled CNT assembly materials, the shear properties between adjacent CNT, and the assembly-dependent mechanical and multifunctional properties of macroscopic CNT fibers and films.
Journal ArticleDOI
Toward Optimal Heat Transfer of 2D-3D Heterostructures via van der Waals Binding Effects.
Lenan Zhang,Yang Zhong,Xin Qian,Qichen Song,Jiawei Zhou,Long Li,Liang Guo,Gang Chen,Evelyn N. Wang +8 more
TL;DR: In this paper, the authors investigate the van der Waals binding effect on heat transport through a MoS2-amorphous silica heterostructure and identify a regime, characterized by the coupling of in-plane and crossplane heat transport mediated by vdW binding energy, where maximal heat dissipation in the device is achieved.
Journal ArticleDOI
Pattern transformations in periodic cellular solids under external stimuli
TL;DR: The structural patterns of periodic cellular materials play an important role in their properties as discussed by the authors, and these patterns transform dramatically under external stimuli in simple periodic cellular structures that include a nanotube bundle and a millimeter-size plastic straw bundle.
Journal ArticleDOI
Quasilocal defects in regular planar networks: Categorization for molecular cones
TL;DR: In this article, structural equivalence classes for regular networks are identified by a "circum-matching" characteristic, which associates closely to the geometric Gaussian curvature of "physically reasonable" embeddings of the net in Euclidean space.