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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Stabilization of carbon nanotubes by filling with inner tubes: An optical spectroscopy study on double-walled carbon nanotubes under hydrostatic pressure
TL;DR: In this paper, the optical transitions in double-walled carbon nanotubes under hydrostatic pressure with optical spectroscopy have been investigated and it was shown that the inner tubes are significantly smaller below 10 GPa, demonstrating the enhanced mechanical stability.
Journal ArticleDOI
Nano-engineering thermal transport performance of carbon nanotube networks with polymer intercalation: a molecular dynamics study
TL;DR: The simulation results show that a low extent of polymer aggregation at the tube contact interfaces can significantly improve the interfacial thermal conductance, and that the polymer molecules wrapping around the CNT walls have a strong negative influence on the bulk thermal conductivity of the C NT along its axis direction.
Journal ArticleDOI
Nanostructured superhard carbon phase obtained under high pressure with shear deformation from single-wall nanotubes HiPco
V.D. Blank,V.N. Denisov,A. N. Kirichenko,N.A. Lvova,S. Y. Martyushov,B. N. Mavrin,D.M. Popova,M. Yu. Popov,E. V. Tat’yanin,Anvar A. Zakhidov +9 more
TL;DR: In this article, the Raman spectra of single-wall nanotubes under high pressure combined with shear deformation were investigated in situ in a diamond cell, and the hardness of the superhard material was 58±6 GPa.
Journal ArticleDOI
Pressure-induced phenomena in single-walled carbon nanotubes: Structural phase transitions and the role of pressure transmitting medium
TL;DR: In this article, the effect of pressure on the electronic properties of bundled single-walled carbon nanotubes by infrared transmission measurements was studied, and different pressure transmitting media were employed to verify their influence on the observed pressure dependence.
Journal ArticleDOI
Pressure and Orientation Effects on the Electronic Structure of Carbon Nanotube Bundles
TL;DR: In this paper, the authors study pressure and orientation effects on geometric and electronic structures of crystalline bundles consisting of single-wall carbon nanotubes, (6, 0), (8, 0, 6, 6), and 12, 0.