Tailoring low-dimensional structures of bismuth on monolayer epitaxial graphene

H. H. Chen, S. H. Su, S. L. Chang, B. Y. Cheng, S. W. Chen, H. Y. Chen, M. F. Lin, J. C.A. Huang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

To improve graphene-based multifunctional devices at nanoscale, a stepwise and controllable fabrication procedure must be elucidated. Here, a series of structural transition of bismuth (Bi) adatoms, adsorbed on monolayer epitaxial graphene (MEG), is explored at room temperature. Bi adatoms undergo a structural transition from one-dimensional (1D) linear structures to two-dimensional (2D) triangular islands and such 2D growth mode is affected by the corrugated substrate. Upon Bi deposition, a little charge transfer occurs and a characteristic peak can be observed in the tunneling spectrum, reflecting the distinctive electronic structure of the Bi adatoms. When annealed to ∼500K, 2D triangular Bi islands aggregate into Bi nanoclusters (NCs) of uniform size. A well-controlled fabrication method is thus demonstrated. The approaches adopted herein provide perspectives for fabricating and characterizing periodic networks on MEG and related systems, which are useful in realizing graphene-based electronic, energy, sensor and spintronic devices.

Original languageEnglish
Article number11623
JournalScientific reports
Volume5
DOIs
Publication statusPublished - 2015 Jun 23

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Bismuth
Graphite
Monolayers
Adatoms
Fabrication
Magnetoelectronics
Nanoclusters
Electronic structure
Charge transfer
Sensors
Substrates

All Science Journal Classification (ASJC) codes

  • General

Cite this

Chen, H. H. ; Su, S. H. ; Chang, S. L. ; Cheng, B. Y. ; Chen, S. W. ; Chen, H. Y. ; Lin, M. F. ; Huang, J. C.A. / Tailoring low-dimensional structures of bismuth on monolayer epitaxial graphene. In: Scientific reports. 2015 ; Vol. 5.
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Tailoring low-dimensional structures of bismuth on monolayer epitaxial graphene. / Chen, H. H.; Su, S. H.; Chang, S. L.; Cheng, B. Y.; Chen, S. W.; Chen, H. Y.; Lin, M. F.; Huang, J. C.A.

In: Scientific reports, Vol. 5, 11623, 23.06.2015.

Research output: Contribution to journalArticle

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