P-Type Doping of Graphene with Cationic Nitrogen

Sangwoo Chae, Gasidit Panomsuwan, Maria Antoaneta Bratescu, Katsuya Teshima, Nagahiro Saito

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Tailoring electrical properties of graphene by nitrogen doping is currently of great significance in a broad area of advanced applications. Bonding configuration of nitrogen atoms in graphene plays a vital role in controlling its electrical, chemical, and optical properties. Here, we report for the first time a simple bottom-up synthesis of a novel cationic nitrogen-doped graphene (CNG) by a solution plasma (SP). A mixture of ionic liquid and organic solvent was used as starting precursor. CNG exhibited an orthorhombic structure possibly due to the presence cationic nitrogen in hexagonal graphene lattice. Nitrogen doping content was found to be as high as 13.4 atom %. Electrical characterization demonstrated that the CNG exhibited a p-type semiconducting behavior with superior electrical conductivity and carrier concentration. Such unique electrical characteristics of CNG are mainly attributed to the presence of cationic nitrogen with preserved planar structure.

Original languageEnglish
Pages (from-to)1350-1355
Number of pages6
JournalACS Applied Nano Materials
Issue number3
Publication statusPublished - 2019 Mar 22
Externally publishedYes


  • cationic nitrogen
  • graphene
  • high carrier concentration
  • high electrical conductivity
  • ionic liquids
  • p-type
  • solution plasma

ASJC Scopus subject areas

  • Materials Science(all)


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