Magnetic Orientation and Magnetic Properties of a Single Carbon Nanotube

Abstract

Carbon nanotubes were suspended in carbon tetrachloride and placed in magnetic fields of <80.0 kOe at 310 K. Scanning electron microscopy showed that a single and free nanotube was oriented with the tube axis parallel to the fields. From the Boltzmann distribution of tube directions, the anisotropy of susceptibilities parallel (χ∥) and perpendicular (χ⊥) to the tube axis is estimated to be χ∥ − χ⊥ ∼ (9 ± 5) × 10-6 emu per mole of carbon atoms (χ⊥ < χ∥ < 0).

Fabrication of a short carbon fiber/gel composite that responds to a magnetic field

“…Among them, carbon nanotubes (CNTs) and carbon fibers (CFs) have a large diamagnetic anisotropy owing to their graphene structures; the anisotropy causes a magnetic alignment. This nature of the materials is utilized to fabricate composites in which short CNTs [1][2][3][4] or CFs [5][6][7][8] are aligned in such a manner as to maximally utilize their excellent mechanical, thermal, and electronic properties [9].…”

Numerical simulation of chainlike cluster movement of feeble magnetic particles by induced magnetic dipole moment under high magnetic fields

“…For example, needle-like fiber [1,2], carbon nanotubes [3,4] and inorganic crystals [5][6][7], which are typical one-dimensional materials, have attracted much interest because of their unique properties and potential applications in mechanical, electrical and thermodynamic devices. Chainlike materials are also considered one dimensional.…”

Simultaneous alignment and micropatterning of carbon nanotubes using modulated magnetic field

“…Many studies have been reported on the alignment of CNTs by magnetic methods [4][5][6][7][8]. High magnetic fields made it possible to visualize magnetic effects on diamagnetic materials such as CNTs [9].…”