Patterned hydrogenation of graphene: Magnetic quantum dot array

Menghao Wu, Xiaojun Wu, Yi Gao, Xiao Cheng Zeng

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We design a new class of chemically modified graphenes through selective hydrogenation, which contain an array of triangular carbon domains separated by hydrogenated carbon stripes. By using a density-functional theory method within the generalized gradient approximation in the Perdew-Burke-Ernzerhof functional form, we show that each carbon triangle possesses notable magnetic moment on the edges. The chemically patterned graphene can be also viewed as an array of semiconducting quantum dots, where the hydrogenated carbon stripes play the role of quantum confinement. By adjusting the width of hydrogenated carbon stripes or the length scale of uncoated carbon triangles, the magnetic moment, band gap, and optical properties of the selectively hydrogenated graphene can be tuned.

Original languageEnglish (US)
Pages (from-to)139-142
Number of pages4
JournalJournal of Physical Chemistry C
Volume114
Issue number1
DOIs
StatePublished - Jan 14 2010

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Graphite
Graphene
Semiconductor quantum dots
Hydrogenation
hydrogenation
graphene
Carbon
quantum dots
carbon
Magnetic moments
triangles
magnetic moments
Quantum confinement
Density functional theory
Energy gap
Optical properties
adjusting
density functional theory
optical properties
gradients

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Patterned hydrogenation of graphene : Magnetic quantum dot array. / Wu, Menghao; Wu, Xiaojun; Gao, Yi; Zeng, Xiao Cheng.

In: Journal of Physical Chemistry C, Vol. 114, No. 1, 14.01.2010, p. 139-142.

Research output: Contribution to journalArticle

Wu, Menghao ; Wu, Xiaojun ; Gao, Yi ; Zeng, Xiao Cheng. / Patterned hydrogenation of graphene : Magnetic quantum dot array. In: Journal of Physical Chemistry C. 2010 ; Vol. 114, No. 1. pp. 139-142.
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