Three-dimensional nano-foam of few-layer graphene grown by CVD for DSSC

2012 ◽  
Vol 14 (22) ◽  
pp. 7938 ◽  
Author(s):  
Jung-Soo Lee ◽  
Hyo-Jin Ahn ◽  
Jong-Chul Yoon ◽  
Ji-Hyun Jang
Keyword(s):  
Three Dimensional ◽  
Layer Graphene ◽  
Few Layer Graphene

scholarly journals Binder free three-dimensional sulphur/few-layer graphene foam cathode with enhanced high-rate capability for rechargeable lithium sulphur batteries

Nanoscale ◽  
2014 ◽  
Vol 6 (11) ◽  
pp. 5746-5753 ◽  
Author(s):  
Kai Xi ◽  
Piran R. Kidambi ◽  
Renjie Chen ◽  
Chenlong Gao ◽  
Xiaoyu Peng ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Rate Capability ◽  
High Rate ◽  
High Rate Capability ◽  
Capacity Retention ◽  
Layer Graphene ◽  
Binder Free ◽  
Rate Discharge ◽  
Few Layer Graphene ◽  
High Rate Discharge

A novel ultra-lightweight 3-D Li-S battery cathode has been synthesised by loading sulphur on to an interconnected 3-D network of few-layered graphene. The battery shows high rate discharge capacity retention for up to 400 cycles.

scholarly journals Reconfigurable THz Plasmonic Antenna Based on Few-Layer Graphene with High Radiation Efficiency

Nanomaterials ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 577 ◽  
Author(s):  
Seyed Hosseininejad ◽  
Mohammad Neshat ◽  
Reza Faraji-Dana ◽  
Max Lemme ◽  
Peter Haring Bolívar ◽  
...  
Keyword(s):  
Matrix Theory ◽  
Three Dimensional ◽  
Frequency Dispersion ◽  
Radiation Efficiency ◽  
Monolayer Graphene ◽  
Plasmonic Waveguides ◽  
Layer Graphene ◽  
Element Simulation ◽  
Few Layer Graphene ◽  
Propagation Properties

Graphene plasmonic antennas possess two significant features that render them appealing for short-range wireless communications, notably, inherent tunability and miniaturization due to the unique frequency dispersion of graphene and its support for surface plasmon waves in the terahertz band. In this letter, dipole-like antennas using few-layer graphene are proposed to achieve a better trade-off between miniaturization and radiation efficiency than current monolayer graphene antennas. The characteristics of few-layer graphene antennas are evaluated and then compared with those of antennas based on monolayer graphene and graphene stacks, which could also provide such improvements. To this end, first, the propagation properties of one-dimensional and two-dimensional plasmonic waveguides based on the aforementioned graphene structures are obtained by transfer matrix theory and finite-element simulation, respectively. Second, the antennas are investigated as three-dimensional structures using a full-wave solver. Results show that the highest radiation efficiency among the compared designs is achieved with the few-layer graphene, while the highest miniaturization is obtained with the even mode of the graphene stack antenna.

Thermal Transport in Three-Dimensional Foam Architectures of Few-Layer Graphene and Ultrathin Graphite

Nano Letters ◽  
2012 ◽  
Vol 12 (6) ◽  
pp. 2959-2964 ◽  
Author(s):  
Michael Thompson Pettes ◽  
Hengxing Ji ◽  
Rodney S. Ruoff ◽  
Li Shi
Keyword(s):  
Thermal Transport ◽  
Three Dimensional ◽  
Layer Graphene ◽  
Few Layer Graphene

Three dimensional few layer graphene and carbon nanotube foam architectures for high fidelity supercapacitors

Nano Energy ◽  
2013 ◽  
Vol 2 (2) ◽  
pp. 294-303 ◽  
Author(s):  
Wei Wang ◽  
Shirui Guo ◽  
Miroslav Penchev ◽  
Isaac Ruiz ◽  
Krassimir N. Bozhilov ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Three Dimensional ◽  
High Fidelity ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Carbon Nanotube Foam

Thermal conductivity reduction in three dimensional graphene-based nanofoam

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 99394-99397 ◽  
Author(s):  
Pradheep Thiyagarajan ◽  
Zhong Yan ◽  
Jong-Chul Yoon ◽  
Min-Wook Oh ◽  
Ji-Hyun Jang
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Three Dimensional ◽  
Layer Graphene ◽  
Few Layer Graphene

This work investigates the thermoelectric properties of a three dimensional nanofoam of few layer graphene (3D-NFG) decorated with holes having diameters of several tens of nanometers.

Electrical properties of polytetrafluoroethylene/few-layer graphene composites fabricated by solid-state processing

2016 ◽  
Vol 51 (18) ◽  
pp. 2565-2573 ◽  
Author(s):  
JY Suh ◽  
SE Shin ◽  
DH Bae
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Electrical Properties ◽  
Room Temperature ◽  
Three Dimensional ◽  
Powder Surface ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
State Processing

High electrical performances of polytetrafluoroethylene composites containing few-layer graphenes are established by solid-state processing. Polytetrafluoroethylene and FLG powders are mechanically mixed without solvents at room temperature, and hot-pressed. Few-layer graphenes are attached to the polytetrafluoroethylene powder, and gradually wrap the powder surface during milling with a low milling speed. The few-layer graphene-wrapped polytetrafluoroethylene powders readily facilitate the formation of a continuous few-layer graphene network due to the contact between adjacent few-layer graphene-wrapped powders. The final composites using few-layer graphene-wrapped polytetrafluoroethylene powders include a three-dimensional conducting network. Eventually, the wrapping morphology of the polytetrafluoroethylene/few-layer graphene powder results in a remarkable electrical conductivity of 7353 Sm−1 at 30 vol. %. few-layer graphene loading.

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.

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