scholarly journals The improved piezoelectric properties of ZnO nanorods with oxygen plasma treatment on the single layer graphene coated polymer substrate (Phys. Status Solidi A 2∕2014)

2014 ◽  
Vol 211 (2) ◽  
pp. n/a-n/a
Author(s):  
Mushtaque Hussain ◽  
Mazhar Ali Abbasi ◽  
Zafar Hussain Ibupoto ◽  
Omer Nur ◽  
Magnus Willander
Keyword(s):  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Piezoelectric Properties ◽  
Zno Nanorods ◽  
Single Layer ◽  
Polymer Substrate ◽  
Single Layer Graphene ◽  
Oxygen Plasma Treatment ◽  
Layer Graphene

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.

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

scholarly journals The effect of oxygen-plasma treatment on the mechanical and piezoelectrical properties of ZnO nanorods

2014 ◽  
Vol 608 ◽  
pp. 235-238 ◽  
Author(s):  
Mushtaque Hussain ◽  
Azam Khan ◽  
Omer Nur ◽  
Magnus Willander ◽  
Esteban Broitman
Keyword(s):  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Zno Nanorods ◽  
Oxygen Plasma Treatment ◽  
Effect Of Oxygen

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 Evaluation of the Mechanical Properties of ZnO Nanorods Treated with Oxygen Plasma using Atomic Force Microscopy

2021 ◽  
Vol 59 (3) ◽  
pp. 209-216
Author(s):  
Donghyuck Park ◽  
Yijun Yang ◽  
Kwanlae Kim
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Plasma Treatment ◽  
Elastic Properties ◽  
Oxygen Vacancies ◽  
Oxygen Plasma ◽  
Zno Nanorods ◽  
Oxygen Plasma Treatment ◽  
Force Microscopy ◽  
Atomic Force

Zinc oxide (ZnO) simultaneously exhibits semiconducting and piezoelectric properties. ZnO in the form of nanorods has been studied intensively for application in self-powering devices. The power generation in piezoelectric nanogenerators based on ZnO nanorods can be improved via several approaches, including an oxygen plasma treatment. When ZnO nanorods are exposed to oxygen plasma, the charge carrier concentration decreases and the piezoelectric output voltage consequently increases. However, the effects of oxygen plasma on the mechanical properties of ZnO nanorods has not been systematically studied using a precise measurement technique. Given the size of ZnO nanorods, atomic force microscopy (AFM) is a suitable method for manipulating individual ZnO nanorods and measuring their elastic properties. In the present work, we observed the effects of oxygen plasma on the elemental composition and microstructure of ZnO nanorods. First of all, the surface roughness of the ZnO nanorods was analyzed using AFM, revealing that it increased due to the etching effect of the oxygen plasma. From X-ray photoelectron spectroscopy (XPS) measurements, three distinct peaks corresponding to lattice oxygen, oxygen vacancies, and absorbed oxygen on the surface were identified. The XPS analysis results showed that oxygen vacancy defects on the ZnO nanorods were decreased by oxygen plasma treatment. Next, the effects of oxygen plasma on the elastic properties of ZnO nanorods were studied using lateral force microscopy. It was confirmed that the elastic modulus of ZnO nanorods increased due to the reduced number of defects originating from oxygen vacancies.

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
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