Direct growth of graphene on SiC(0001) by KrF-excimer-laser irradiation

Masakazu Hattori, Hiroshi Ikenoue, Daisuke Nakamura, Kazuaki Furukawa, Makoto Takamura, Hiroki Hibino, Tatsuo Okada

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this report, we propose a direct patterning method of graphene on the SiC(0001) surface by KrF-excimer-laser irradiation. In this method, Si atoms are locally sublimated from the SiC surface in the laser-irradiated area, and direct graphene growth is induced by the rearrangement of surplus carbon on the SiC surface. Using Raman microscopy, we demonstrated the formation of graphene by laser irradiation and observed the growth process by transmission electron microscopy and conductive atomic force microscopy. When SiC was irradiated by 5000 shots of the laser beam with a fluence of 1.2 J/cm2, two layers of graphene were synthesized on the SiC(0001) surface. The number of graphene layers increased from 2 to 5-7 with an increase in the number of laser shots. Based on the results of conductive-atomic force microscopy measurements, we conclude that graphene formation was initiated from the step area, after which the graphene grew towards the terrace area by further Si evaporation and C recombination with increasing laser irradiation.

Original languageEnglish
Article number093107
JournalApplied Physics Letters
Volume108
Issue number9
DOIs
Publication statusPublished - Feb 29 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Direct growth of graphene on SiC(0001) by KrF-excimer-laser irradiation'. Together they form a unique fingerprint.

  • Cite this