Large Area Quasi-Free Standing Monolayer Graphene on 3C-SiC(111)

2012 ◽  
Vol 717-720 ◽  
pp. 617-620 ◽  
Author(s):  
Ulrich Starke ◽  
Camilla Coletti ◽  
Konstantin Emtsev ◽  
Alexei A. Zakharov ◽  
Thierry Ouisse ◽  
...  
Keyword(s):  
Graphene Layer ◽  
Large Scale ◽  
Bulk Crystal ◽  
Monolayer Graphene ◽  
Graphene Monolayer ◽  
Large Area ◽  
Free Standing ◽  
Hydrogen Intercalation

Large scale, homogeneous quasi-free standing monolayer graphene is obtained on a (111) oriented cubic SiC bulk crystal. The free standing monolayer was prepared on the 3C-SiC(111) surface by hydrogen intercalation of a -reconstructed carbon monolayer, so-called zerolayer graphene, which had been grown in Ar atmosphere. The regular morphology of the surface, the complete chemical and structural decoupling of the graphene layer from the SiC substrate as well as the development of sharp monolayer p-bands are demonstrated. On the resulting sample, homogeneous graphene monolayer domains extend over areas of hundreds of square-micrometers.

Hydrogen Intercalation below Epitaxial Graphene on SiC(0001)

2010 ◽  
Vol 645-648 ◽  
pp. 623-628 ◽  
Author(s):  
Christian Riedl ◽  
Camilla Coletti ◽  
Takayuki Iwasaki ◽  
Ulrich Starke
Keyword(s):  
Hydrogen Bonds ◽  
Buffer Layer ◽  
Epitaxial Graphene ◽  
Monolayer Graphene ◽  
Graphene Monolayer ◽  
Free Standing ◽  
Strong Electron ◽  
Hydrogen Intercalation ◽  
Initial Carbon ◽  
N Doping

In this report we review how intrinsic drawbacks of epitaxial graphene on SiC(0001) such as n-doping and strong electronic influence of the substrate can be overcome. Besides surface transfer doping from a strong electron acceptor and transfer of epitaxial graphene from SiC(0001) to SiO2 the most promising route is to generate quasi-free standing epitaxial graphene by means of hydrogen intercalation. The hydrogen moves between the (6p3×6p3)R30◦ reconstructed initial carbon (so-called buffer) layer and the SiC substrate. The topmost Si atoms which for epitaxial graphene are covalently bound to this buffer layer, are now saturated by hydrogen bonds. The buffer layer is turned into a quasi-free standing graphene monolayer, epitaxial monolayer graphene turns into a decoupled bilayer. The intercalation is stable in air and can be reversed by annealing to around 900 °C. This technique offers significant advances in epitaxial graphene based nanoelectronics.

Numerical Analysis of Circular Graphene Bubbles

2013 ◽  
Vol 80 (4) ◽  
Author(s):  
Peng Wang ◽  
Wei Gao ◽  
Zhiyi Cao ◽  
Kenneth M. Liechti ◽  
Rui Huang
Keyword(s):  
Large Scale ◽  
Plate Theory ◽  
Approximate Solutions ◽  
Van Der Waals Interactions ◽  
Monolayer Graphene ◽  
Graphene Monolayer ◽  
Lateral Loads ◽  
Adhesive Properties ◽  
Dynamics Simulations ◽  
Low Pressures

Pressurized graphene bubbles have been observed in experiments, which can be used to determine the mechanical and adhesive properties of graphene. A nonlinear plate theory is adapted to describe the deformation of a graphene monolayer subject to lateral loads, where the bending moduli of monolayer graphene are independent of the in-plane Young's modulus and Poisson's ratio. A numerical method is developed to solve the nonlinear equations for circular graphene bubbles, and the results are compared to approximate solutions by analytical methods. Molecular dynamics simulations of nanoscale graphene bubbles are performed, and it is found that the continuum plate theory is suitable only within the limit of linear elasticity. Moreover, the effect of van der Waals interactions between graphene and its underlying substrate is analyzed, including large-scale interaction for nanoscale graphene bubbles subject to relatively low pressures.

Quantitative analysis of improved bending fracture behavior of large-scale graphene monolayer-intervened flexible oxide thin films

2018 ◽  
Vol 6 (23) ◽  
pp. 6125-6131 ◽  
Author(s):  
Hong Je Choi ◽  
Da Bin Kim ◽  
Moo Hyun Kim ◽  
Gwan-Hyoung Lee ◽  
Yong Soo Cho
Keyword(s):  
Thin Films ◽  
Quantitative Analysis ◽  
Fracture Resistance ◽  
Graphene Layer ◽  
Fracture Behavior ◽  
Large Scale ◽  
Graphene Monolayer ◽  
Transparent Conducting Films ◽  
Transparent Conducting ◽  
Bending Fracture

A graphene layer improves the fracture resistance of flexible transparent conducting films by ∼61%.

Frank-van der Merwe Growth in Bilayer Graphene

2020 ◽  
Author(s):  
Haozhe Wang ◽  
Zhenpeng Yao ◽  
Wei Sun Leong ◽  
Gang Seob Jung ◽  
Qichen Song ◽  
...  
Keyword(s):  
Bilayer Graphene ◽  
Growth Mode ◽  
Monolayer Graphene ◽  
Layer By Layer ◽  
Large Area ◽  
Island Growth ◽  
Free Standing ◽  
Adhesive Energy ◽  
Twisting Angle

<p>Bilayer graphene has attracted interest for its unique properties, including interesting electrical behavior when one layer is slightly rotated relative to the other. However, the quality of large-area bilayer graphene is often limited by the layer-plus-island growth mode in which islands of thicker graphene present as unavoidable impurities. Here, we report the observation of the layer-by-layer, Frank-van der Merwe (FM) growth mode in bilayer graphene where multilayer impurities are suppressed. Instead of the conventional surface adhesive energy, it is found that interface adhesive energy is possible to be tuned with an oxidative pretreatment. The FM-grown bilayer graphene is of AB-stacking or with small-twisting-angle (θ = 0-5°), which is more mechanically robust compared to monolayer graphene, facilitating a free-standing wet transfer technology.</p>

Effects of hydrogen intercalation on transport properties of quasi-free-standing monolayer graphene

2014 ◽  
Vol 53 (4S) ◽  
pp. 04EN01 ◽  
Author(s):  
Shinichi Tanabe ◽  
Makoto Takamura ◽  
Yuichi Harada ◽  
Hiroyuki Kageshima ◽  
Hiroki Hibino
Keyword(s):  
Transport Properties ◽  
Monolayer Graphene ◽  
Free Standing ◽  
Hydrogen Intercalation

Frank-van der Merwe Growth in Bilayer Graphene

2020 ◽  
Author(s):  
Haozhe Wang ◽  
Zhenpeng Yao ◽  
Wei Sun Leong ◽  
Gang Seob Jung ◽  
Qichen Song ◽  
...  
Keyword(s):  
Bilayer Graphene ◽  
Growth Mode ◽  
Monolayer Graphene ◽  
Layer By Layer ◽  
Large Area ◽  
Island Growth ◽  
Free Standing ◽  
Adhesive Energy ◽  
Twisting Angle

<p>Bilayer graphene has attracted interest for its unique properties, including interesting electrical behavior when one layer is slightly rotated relative to the other. However, the quality of large-area bilayer graphene is often limited by the layer-plus-island growth mode in which islands of thicker graphene present as unavoidable impurities. Here, we report the observation of the layer-by-layer, Frank-van der Merwe (FM) growth mode in bilayer graphene where multilayer impurities are suppressed. Instead of the conventional surface adhesive energy, it is found that interface adhesive energy is possible to be tuned with an oxidative pretreatment. The FM-grown bilayer graphene is of AB-stacking or with small-twisting-angle (θ = 0-5°), which is more mechanically robust compared to monolayer graphene, facilitating a free-standing wet transfer technology.</p>

scholarly journals Quartz crystal microbalance monitoring of large-area graphene anodization reveals layer fracturing

MRS Advances ◽  
2021 ◽  
Author(s):  
Anastasia Svetlova ◽  
Guillermo Beltramo ◽  
Dmitry Kireev ◽  
Andreas Offenhäusser
Keyword(s):  
Quartz Crystal Microbalance ◽  
Liquid Flow ◽  
Large Scale ◽  
Quartz Crystal ◽  
Reference Electrode ◽  
Monolayer Graphene ◽  
Large Area ◽  
Custom Made ◽  
Potential Applications ◽  
Graphene Oxidation

AbstractGraphene has numerous potential applications in ultrathin electronics. There an electrode should function in contact with fluids and under mechanical stress; therefore, its stability is specifically of concern. Here, we explored a custom-made quartz crystal microbalance (QCM) sensor covered with wet-transferred large-scale monolayer graphene for investigation of an electrode behavior. Monolayer graphene was found to be stable on an oscillating substrate in contact with air and liquid. Under the liquid flow and simultaneously applied electrochemical potential, we managed to induce graphene oxidation, impact of which was observed on a quartz crystal microbalance monitoring and Raman spectra. Applied potentials of 1 V and higher (vs. Ag/AgCl reference electrode) caused graphene oxidation which led to loss of the layer integrity and erosion of the material. Graphic abstract

scholarly journals Large area quasi-free standing monolayer graphene on 3C-SiC(111)

2011 ◽  
Vol 99 (8) ◽  
pp. 081904 ◽  
Author(s):  
C. Coletti ◽  
K. V. Emtsev ◽  
A. A. Zakharov ◽  
T. Ouisse ◽  
D. Chaussende ◽  
...  
Keyword(s):  
Monolayer Graphene ◽  
Large Area ◽  
Free Standing

Uniform coverage of quasi-free standing monolayer graphene on SiC by hydrogen intercalation

2016 ◽  
Vol 28 (4) ◽  
pp. 3884-3890 ◽  
Author(s):  
Cancan Yu ◽  
Xiufang Chen ◽  
Fusheng Zhang ◽  
Li Sun ◽  
Tian Li ◽  
...  
Keyword(s):  
Monolayer Graphene ◽  
Free Standing ◽  
Uniform Coverage ◽  
Hydrogen Intercalation

Free electromagnetic radiation from the graphene monolayer with spatially modulated conductivity in THz range

2016 ◽  
Vol 30 (11) ◽  
pp. 1650185 ◽  
Author(s):  
Vladimir Gerasik ◽  
Marek S. Wartak ◽  
Alexander V. Zhukov ◽  
Mikhail B. Belonenko
Keyword(s):  
Electromagnetic Waves ◽  
Surface Plasmon Polariton ◽  
Graphene Layer ◽  
Graphene Monolayer ◽  
Finite Width ◽  
Free Standing ◽  
Fabry Perot ◽  
Type Integral ◽  
Integral Equation Approach ◽  
Plasmon Polariton

An infinite graphene layer is known to support graphene surface plasmon polariton (GSP) confined at the interface between the two dielectric half-spaces. In the case of finite width graphene stripe, the termination of the graphene layer acts both as a scattering source and as a “mirror”, thus producing Fabry–Perot (FP)-type resonance. These resonant wavelengths in the presence of free-standing graphene stripe are investigated using the homogeneous convolution-type integral equation approach. The capabilities of the suggested numerical method are illustrated with the results for the transmission spectrum of TM electromagnetic waves travelling in the direction perpendicular to the graphene stripe. Special attention is paid to the case of spatially modulated conductivity of the graphene monolayer, and thus the feasibility of controlling the GSP response.

Sign in / Sign up

Export Citation Format

Share Document