scholarly journals Effects of graphene surface functionalities towards controlled reinforcement of a lignin based renewable thermoplastic rubber

2020 ◽  
Vol 199 ◽  
pp. 108352
Author(s):  
Gyoung G. Jang ◽  
Ngoc A. Nguyen ◽  
Christopher C. Bowland ◽  
Hoi Chun Ho ◽  
Jong K. Keum ◽  
...  
Keyword(s):  
Graphene Surface ◽  
Thermoplastic Rubber

Comparative study of electron transfer on various graphene-metallic contacts

2019 ◽  
Vol 33 (31) ◽  
pp. 1950384
Author(s):  
Di Lu ◽  
Yu-E Yang ◽  
Weichun Zhang ◽  
Caixia Wang ◽  
Jining Fang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Single Layer ◽  
Annealing Treatment ◽  
Single Layer Graphene ◽  
Strain Effect ◽  
Graphene Surface ◽  
Layer Graphene ◽  
Metallic Contacts ◽  
Nonuniform Strain ◽  
Main Factor

We have investigated Raman spectra of the G and 2D lines of a single-layer graphene (SLG) with metallic contacts. The shift of the G and 2D lines is correlated to two different factors. Before performing annealing treatment or annealing under low temperature, the electron transfer on graphene surface is dominated by nonuniform strain effect. As the annealing treatment is enhanced, however, a suitable annealing treatment can eliminate the nonuniform strain effect where the relative work function (WF) between graphene and metal becomes a main factor to determine electronic transfer. Moreover, it is confirmed that the optimized annealing treatment can also decrease effectively the structural defect and induced disorder in graphene due to metallic contacts.

Combined DFT and kinetic Monte Carlo study of a bridging-spillover mechanism on fluorine-decorating graphene

2020 ◽  
Author(s):  
Jing-hua Guo ◽  
Jin-Xiang Liu ◽  
Hongbo Wang ◽  
Haiying Liu ◽  
Gang Chen
Keyword(s):  
Monte Carlo ◽  
First Principles ◽  
Kinetic Monte Carlo ◽  
Monte Carlo Study ◽  
First Principles Calculations ◽  
Graphene Surface

In this work, combining the first-principles calculations with kinetic Monte Carlo (KMC) simulations, we constructed an irregular carbon bridge on the graphene surface and explored the process of H migration...

Synergistic effect of anion and cation in oxalic acid for graphene surface engineering and its enhanced pseudocapacitance performance

2021 ◽  
Vol 868 ◽  
pp. 159128
Author(s):  
Yang Yang ◽  
Minghua Wang ◽  
Zhengyue Shi ◽  
Rubo Xiao ◽  
Xiangcheng Sun ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Oxalic Acid ◽  
Surface Engineering ◽  
Graphene Surface

scholarly journals Demonstration of epitaxial growth of strain-relaxed GaN films on graphene/SiC substrates for long wavelength light-emitting diodes

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Ye Yu ◽  
Tao Wang ◽  
Xiufang Chen ◽  
Lidong Zhang ◽  
Yang Wang ◽  
...  
Keyword(s):  
Epitaxial Growth ◽  
Light Emitting Diodes ◽  
Nitrogen Plasma ◽  
Biaxial Stress ◽  
Organic Chemical ◽  
Graphene Surface ◽  
Light Emitting ◽  
Long Wavelength ◽  
Pre Treatment ◽  
Wavelength Light

AbstractStrain modulation is crucial for heteroepitaxy such as GaN on foreign substrates. Here, the epitaxy of strain-relaxed GaN films on graphene/SiC substrates by metal-organic chemical vapor deposition is demonstrated. Graphene was directly prepared on SiC substrates by thermal decomposition. Its pre-treatment with nitrogen-plasma can introduce C–N dangling bonds, which provides nucleation sites for subsequent epitaxial growth. The scanning transmission electron microscopy measurements confirm that part of graphene surface was etched by nitrogen-plasma. We study the growth behavior on different areas of graphene surface after pre-treatment, and propose a growth model to explain the epitaxial growth mechanism of GaN films on graphene. Significantly, graphene is found to be effective to reduce the biaxial stress in GaN films and the strain relaxation improves indium-atom incorporation in InGaN/GaN multiple quantum wells (MQWs) active region, which results in the obvious red-shift of light-emitting wavelength of InGaN/GaN MQWs. This work opens up a new way for the fabrication of GaN-based long wavelength light-emitting diodes.

scholarly journals Adsorption on graphene: flat to edge to end transitions of phenyl hydroquinone

2017 ◽  
Vol 19 (27) ◽  
pp. 17521-17525 ◽  
Author(s):  
Lifu Chen ◽  
Eden E. L. Tanner ◽  
Richard G. Compton
Keyword(s):  
Phase Transition ◽  
Organic Molecules ◽  
Graphene Surface

A concentration driven three-stage phase transition of large organic molecules on the graphene surface is revealed.

Density functional theory prediction for diffusion of lithium on boron-doped graphene surface

2011 ◽  
Vol 257 (17) ◽  
pp. 7443-7446 ◽  
Author(s):  
Shuanghong Gao ◽  
Zhaoyu Ren ◽  
Lijuan Wan ◽  
Jiming Zheng ◽  
Ping Guo ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Functional Theory ◽  
Graphene Surface ◽  
Boron Doped ◽  
Doped Graphene

Towards a cleaner graphene surface in graphene field effect transistor via N,N-Dimethylacetamide

2016 ◽  
Vol 3 (9) ◽  
pp. 095011 ◽  
Author(s):  
Da-Cheng Mao ◽  
Song-Ang Peng ◽  
Shao-Qing Wang ◽  
Da-Yong Zhang ◽  
Jing-Yuan Shi ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
Graphene Surface ◽  
Graphene Field Effect Transistor ◽  
Effect Transistor

Defect-induced strong localization of uranium dicarbide on the graphene surface

2014 ◽  
Vol 16 (41) ◽  
pp. 22784-22790 ◽  
Author(s):  
Jie Han ◽  
Xing Dai ◽  
Yang Gao ◽  
Yan Meng ◽  
Zhigang Wang
Keyword(s):  
Graphene Surface ◽  
Strong Localization ◽  
Defective Graphene

The strong localization of UC2 in V6-defective graphene stabilizes the system extremely and stimulates participation of semi-core orbitals in bonding.

Single-mode cylindrical graphene plasmon waveguide

2016 ◽  
Vol 30 (22) ◽  
pp. 1650268
Author(s):  
Jianfeng Yang ◽  
Jingjing Yang ◽  
Ming Huang
Keyword(s):  
Cutoff Frequency ◽  
Single Mode ◽  
Graphene Sheets ◽  
Fem Simulations ◽  
Graphene Surface ◽  
Single Mode Operation ◽  
Mode Behavior ◽  
Novel Applications ◽  
Large Tunability ◽  
Single Mode Condition

A cylindrical graphene plasmon waveguide (CGPW) which consists of two rolled graphene ribbons, a dielectric core and a dielectric interlayer is proposed. An analytical model for the single-mode condition and cutoff frequency of high-order graphene surface plasmon (GSP) modes is presented and verified by finite element method (FEM) simulations. Single-mode operation region of CGPW is identified in the frequency–radius space. By varying the separation between two graphene sheets and the Fermi level of graphene, a large tunability of the mode behavior is also demonstrated. The proposed structure may provide a new freedom to manipulate GSPs, and would lead to novel applications in optics.

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