scholarly journals Evaporation-induced self-assembling of few-layer graphene into a fractal-like conductive macro-network with a reduction of percolation threshold

2015 ◽  
Vol 17 (12) ◽  
pp. 7634-7638 ◽  
Author(s):  
I. Janowska
Keyword(s):  
Percolation Threshold ◽  
Layer Graphene ◽  
Self Assembling ◽  
Percolation Thresholds ◽  
Few Layer Graphene

The evaporation-induced self-assembling of a few-layer graphene results in macroscopic branched fractal-like conductive patterns with reduced percolation thresholds.

scholarly journals Properties of Silicone Rubber-Based Composites Reinforced with Few-Layer Graphene and Iron Oxide or Titanium Dioxide

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1550
Author(s):  
Vineet Kumar ◽  
Anuj Kumar ◽  
Minseok Song ◽  
Dong-Joo Lee ◽  
Sung-Soo Han ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Titanium Dioxide ◽  
Iron Oxide ◽  
Stress Relaxation ◽  
Silicone Rubber ◽  
Room Temperature ◽  
Relaxation Rates ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Mechanical Actuation

The increasing demand for polymer composites with novel or improved properties requires novel fillers. To meet the challenges posed, nanofillers such as graphene, carbon nanotubes, and titanium dioxide (TiO2) have been used. In the present work, few-layer graphene (FLG) and iron oxide (Fe3O4) or TiO2 were used as fillers in a room-temperature-vulcanized (RTV) silicone rubber (SR) matrix. Composites were prepared by mixing RTV-SR with nanofillers and then kept for vulcanization at room temperature for 24 h. The RTV-SR composites obtained were characterized with respect to their mechanical, actuation, and magnetic properties. Fourier-transform infrared spectroscopy (FTIR) analysis was performed to investigate the composite raw materials and finished composites, and X-ray photoelectron spectroscopy (XPS) analysis was used to study composite surface elemental compositions. Results showed that mechanical properties were improved by adding fillers, and actuation displacements were dependent on the type of nanofiller used and the applied voltage. Magnetic stress-relaxation also increased with filler amount and stress-relaxation rates decreased when a magnetic field was applied parallel to the deformation axes. Thus, this study showed that the inclusion of iron oxide (Fe3O4) or TiO2 fillers in RTV-SR improves mechanical, actuation, and magnetic properties.

scholarly journals Temperature Dependence of G and D’ Phonons in Monolayer to Few-Layer Graphene with Vacancies

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Mingming Yang ◽  
Longlong Wang ◽  
Xiaofen Qiao ◽  
Yi Liu ◽  
Yufan Liu ◽  
...  
Keyword(s):  
Negative Temperature Coefficient ◽  
Negative Temperature ◽  
Intrinsic Properties ◽  
Temperature Dependent ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Layer Graphene ◽  
A Value ◽  
Few Layer Graphene

Abstract The defects into the hexagonal network of a sp2-hybridized carbon atom have been demonstrated to have a significant influence on intrinsic properties of graphene systems. In this paper, we presented a study of temperature-dependent Raman spectra of G peak and D’ band at low temperatures from 78 to 318 K in defective monolayer to few-layer graphene induced by ion C+ bombardment under the determination of vacancy uniformity. Defects lead to the increase of the negative temperature coefficient of G peak, with a value almost identical to that of D’ band. However, the variation of frequency and linewidth of G peak with layer number is contrary to D’ band. It derives from the related electron-phonon interaction in G and D’ phonon in the disorder-induced Raman scattering process. Our results are helpful to understand the mechanism of temperature-dependent phonons in graphene-based materials and provide valuable information on thermal properties of defects for the application of graphene-based devices.

Few-layer graphene prepared via microwave irradiation of black sesame for supercapacitor applications

2021 ◽  
Vol 425 ◽  
pp. 130664
Author(s):  
Xinghe Xu ◽  
Shichang Sun ◽  
Juan Luo ◽  
Rui Ma ◽  
Junhao Lin ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Supercapacitor Applications

Highly-doped p-type few-layer graphene on UID off-axis homoepitaxial 4H-SiC

2021 ◽  
Author(s):  
Tymoteusz Ciuk ◽  
Wawrzyniec Kaszub ◽  
Kinga Kosciewicz ◽  
Artur Dobrowolski ◽  
Jakub Jagiello ◽  
...  
Keyword(s):  
Layer Graphene ◽  
P Type ◽  
Few Layer Graphene

Direct Visualization and Manipulation of Stacking Orders in Few-Layer Graphene by Dynamic Atomic Force Microscopy

2021 ◽  
pp. 7328-7334
Author(s):  
Hongjian Wu ◽  
Xiaoxiang Yu ◽  
Mengjian Zhu ◽  
Zhihong Zhu ◽  
Jianyu Zhang ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Direct Visualization ◽  
Force Microscopy ◽  
Layer Graphene ◽  
Atomic Force ◽  
Few Layer Graphene

scholarly journals Designing few-layer graphene Schottky contact solar cells: Theoretical efficiency limits and parametric optimization

2021 ◽  
Vol 118 (5) ◽  
pp. 053103
Author(s):  
Xin Zhang ◽  
Jicheng Wang ◽  
Lay Kee Ang ◽  
Yee Sin Ang ◽  
Juncheng Guo
Keyword(s):  
Solar Cells ◽  
Parametric Optimization ◽  
Schottky Contact ◽  
Layer Graphene ◽  
Few Layer Graphene
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