Single Layer vs Bilayer Graphene: A Comparative Study of the Effects of Oxygen Plasma Treatment on Their Electronic and Optical Properties

2011 ◽  
Vol 115 (33) ◽  
pp. 16619-16624 ◽  
Author(s):  
Amirhasan Nourbakhsh ◽  
Mirco Cantoro ◽  
Alexander V. Klekachev ◽  
Geoffrey Pourtois ◽  
Tom Vosch ◽  
...  
Keyword(s):  
Optical Properties ◽  
Comparative Study ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Single Layer ◽  
Bilayer Graphene ◽  
Oxygen Plasma Treatment ◽  
Electronic And Optical Properties

Transition from Metallic to Semiconducting Behavior in Oxygen Plasma-treated Single-layer Graphene

2011 ◽  
Vol 1336 ◽  
Author(s):  
Amirhasan Nourbakhsh ◽  
Mirco Cantoro ◽  
Tom Vosch ◽  
Geoffrey Pourtois ◽  
Johan Hofkens ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Treatment Time ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Oxygen Plasma Treatment ◽  
Pristine Graphene ◽  
Layer Graphene ◽  
Epoxy Groups ◽  
Semiconducting Behavior

ABSTRACTWe investigate the structural, optical and electrical properties of single-layer graphene exposed to oxygen plasma treatment. We find that the pristine semimetallic behavior of graphene disappears upon plasma treatment, in favour of the opening of a bandgap and the featuring of semiconducting properties. The metal-to-semiconductor transition observed appears to be dependent on the plasma treatment time. The semiconducting behavior is also confirmed by photoluminescence measurements. The opening of a bandgap in graphene is explained in terms of graphene surface functionalization with oxygen atoms, bonded as epoxy groups. Ab initio calculations of the density of states show more details about the oxygen–graphene interaction and its effects on the graphene optoelectronic properties, predicting no states near the Fermi level at increasing epoxy group density. The structural changes are also monitored by Raman spectroscopy, showing the progressive evolution of the sp2 character of pristine graphene to sp3, due to the lattice decoration with out-of-plane epoxy groups.

Low-temperature oxygen plasma treatment of single-layer molybdenum disulfide

2019 ◽  
Vol 6 (5) ◽  
pp. 055007 ◽  
Author(s):  
Anthony Akayeti ◽  
Weibing Zhang ◽  
Xiaohong Yan ◽  
Quan Wang
Keyword(s):  
Low Temperature ◽  
Plasma Treatment ◽  
Molybdenum Disulfide ◽  
Oxygen Plasma ◽  
Single Layer ◽  
Oxygen Plasma Treatment

scholarly journals Photoluminescence Quenching in Single-Layer MoS2 via Oxygen Plasma Treatment

2014 ◽  
Vol 118 (36) ◽  
pp. 21258-21263 ◽  
Author(s):  
Narae Kang ◽  
Hari P. Paudel ◽  
Michael N. Leuenberger ◽  
Laurene Tetard ◽  
Saiful I. Khondaker
Keyword(s):  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Single Layer ◽  
Oxygen Plasma Treatment ◽  
Photoluminescence Quenching

Oxygen plasma treatment effect on optical properties of GdBa2Cu3O7−x high-Tc superconducting films

1994 ◽  
Vol 238 (1) ◽  
pp. 119-122
Author(s):  
V.G. Litovchenko ◽  
S.I. Frolov ◽  
N.I. Klyui ◽  
M.A. Tanatar ◽  
V.S. Yefanov
Keyword(s):  
Optical Properties ◽  
Plasma Treatment ◽  
Treatment Effect ◽  
Oxygen Plasma ◽  
Superconducting Films ◽  
Oxygen Plasma Treatment ◽  
High Tc
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