Structural change of ion-induced carbon nanofibers by electron current flow

Mohd Zamri, Pradip Ghosh, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura, Masato Sasase

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)


A graphite foil was irradiated with argon (Ar+) ions to fabricate conical structures with a carbon nanofiber (CNF) on top of the structure. The field emission (FE) properties of one-dimensional individual CNF-tipped cones that had been fabricated were carefully measured by in situ transmission electron microscopy (TEM) facilities. The highest FE current, 550 nA, was observed in the current-voltage (I-V) measurement of a single CNF. Almost no degradation in I-V properties were detected during the reliability test after 30 min. TEM images indicated that the CNF was amorphous in nature initially, and that the electron current flow in the FE process induced the dramatic change in the crystalline structure of both the CNF and of the tip region of the basal cone part. After performing the FE process, the crystalline structures of the amorphous CNFs were transformed into ring-shaped graphene layers, whereas nanodiamond like nanoparticles formed in the outer layer of the tip region of the basal cone. The structural changes induced can be attributed to Joule heating under the high electric field.

ジャーナルJournal of Vacuum Science and Technology B:Nanotechnology and Microelectronics
出版ステータス出版済み - 7 2011

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • プロセス化学およびプロセス工学
  • 表面、皮膜および薄膜
  • 電子工学および電気工学
  • 材料化学


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