Single-walled carbon nanotubes wrapped by cationic nitrogen-doped carbon for electrocatalytic applications

Sangwoo Chae, Phu Quoc Phan, Gasidit Panomsuwan, Maria Antoaneta Bratescu, Takeshi Hashimoto, Katsuya Teshima, Nagahiro Saito

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The exploration of novel carbon material systems has emerged as a promising strategy for yielding unique and unconventional functional properties. In this study, a cationic nitrogen-doped carbonwrapped single-walled carbon nanotube (CN-C@SWCNT) was synthesized for the first time via solution plasma (SP) by using an aniline aqueous solution with the SWCNT dispersion under ambient conditions. The reactive species produced from SP led to the formation of cationic nitrogendoped carbon (CN-C) completely wrapped around SWCNT. Raman spectroscopy, electron diffraction, and X-ray photoelectron spectroscopy confirmed the presence of cationic nitrogen. CN-C@SWCNT exhibited an excellent electrical conductivity of 120.30 S cm-1. Room-temperature halleffect measurements revealed p-type semiconducting behavior for CN-C@ SWCNT, with a carrier concentration of 4.6 × 1020 cm-3. The electrical conductivity and carrier concentration of p-type CN-C@SWCNT were greater than those reported previously for carbon-based materials. The high electrical properties of CN-C@SWCNT were synergistically related to a conducting bridge between CN-C and SWCNT conducting domains and the presence of doped cationic nitrogen. The SP-synthesized CN-C@SWCNT demonstrates immense potential as an emerging class of p-type carbon materials in advanced electrocatalytic applications.

Original languageEnglish
Pages (from-to)10183-10189
Number of pages7
JournalACS Applied Nano Materials
Issue number10
Publication statusPublished - 2020 Oct 23
Externally publishedYes


  • Carbon nanotube
  • Carrier concentration
  • Cationic nitrogen
  • Electrical conductivity
  • Solution plasma

ASJC Scopus subject areas

  • Materials Science(all)


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