Crystallization of single-walled carbon nanotubes from a dilute solution

Tetsuya Uchida, Naoya Tsugawa, Satoru Yoshida, Natsuki Tohnai

Research output: Contribution to journalArticlepeer-review

Abstract

Single-walled carbon nanotubes (SWNTs) with lengths of several hundred nanometers were crystallized from dilute solutions, and slender lath-shaped SWNT crystals were obtained. The SWNTs were oriented along the long axis of the lath-shaped crystal, and the obtained crystals were two-dimensional crystals comprising hexagonally close-packed SWNTs. A relatively long SWNT acted as a crystalline nucleus. The length of the SWNT used for crystallization affected the morphology and growth rate of the crystals. Higher crystallization temperature shortened the time to precipitation, and the diffusion of SWNTs dominated the crystal growth of SWNT crystals. Because the short SWNTs were rigid with a wide length distribution, their tube ends were inevitably included in the crystals, resulting in crystal defects, such as lattice curvature and edge dislocations. These defects were directly observed by high-resolution electron microscopy. The mechanism for the crystallization of the SWNTs was proposed based on the observed morphologies, crystal defects, and crystallization process.

Original languageEnglish
Article number123425
Journalpolymer
Volume216
DOIs
Publication statusPublished - Feb 22 2021

Keywords

  • Crystal
  • Dilute solution
  • Single-walled carbon nanotube

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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