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

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number04E103
JournalJournal of Vacuum Science and Technology B:Nanotechnology and Microelectronics
Volume29
Issue number4
DOIs
Publication statusPublished - 2011
Externally publishedYes

Fingerprint

Carbon nanofibers
Field emission
Ions
field emission
Electrons
carbon
Cones
cones
Graphite
ions
electrons
Crystalline materials
Transmission electron microscopy
Nanodiamonds
transmission electron microscopy
Joule heating
Argon
Voltage measurement
Electric current measurement
Graphene

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Structural change of ion-induced carbon nanofibers by electron current flow. / Zamri, Mohd; Ghosh, Pradip; Hayashi, Akari; Hayashi, Yasuhiko; Tanemura, Masaki; Sasase, Masato.

In: Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics, Vol. 29, No. 4, 04E103, 2011.

Research output: Contribution to journalArticle

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