scholarly journals Dissolution-and-reduction CVD synthesis of few-layer graphene on ultra-thin nickel film lifted off for mode-locking fiber lasers

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Kaung-Jay Peng ◽  
Yung-Hsiang Lin ◽  
Chung-Lun Wu ◽  
Sheng-Fong Lin ◽  
Chun-Yu Yang ◽  
...  
Keyword(s):  
Fiber Lasers ◽  
Mode Locking ◽  
Nickel Film ◽  
Layer Graphene ◽  
Cvd Synthesis ◽  
Thin Nickel ◽  
Few Layer Graphene

Hydrogen-free PECVD growth of few-layer graphene on an ultra-thin nickel film at the threshold dissolution temperature

2013 ◽  
Vol 1 (24) ◽  
pp. 3862 ◽  
Author(s):  
Kaung-Jay Peng ◽  
Chung-Lun Wu ◽  
Yung-Hsiang Lin ◽  
Yen-Ju Liu ◽  
Din-Ping Tsai ◽  
...  
Keyword(s):  
Nickel Film ◽  
Layer Graphene ◽  
Dissolution Temperature ◽  
Thin Nickel ◽  
Few Layer Graphene

CVD synthesis of mono- and few-layer graphene using alcohols at low hydrogen concentration and atmospheric pressure

2013 ◽  
Vol 584 ◽  
pp. 142-146 ◽  
Author(s):  
Jessica Campos-Delgado ◽  
Andrés R. Botello-Méndez ◽  
Gerardo Algara-Siller ◽  
Benoit Hackens ◽  
Thomas Pardoen ◽  
...  
Keyword(s):  
Hydrogen Concentration ◽  
Atmospheric Pressure ◽  
Layer Graphene ◽  
Cvd Synthesis ◽  
Few Layer Graphene

Few-Layer Graphene-Based Saturable Absorbers Employing Mica Dispersant for Fiber Lasers

2013 ◽  
Vol 25 (7) ◽  
pp. 633-636 ◽  
Author(s):  
Hsin-Hui Kuo ◽  
Pi Ling Huang ◽  
Chao-Yung Yeh ◽  
Wood-Hi Cheng
Keyword(s):  
Fiber Lasers ◽  
Saturable Absorbers ◽  
Layer Graphene ◽  
Few Layer Graphene

scholarly journals Preparation of Few-Layer Graphene/Carbon Nanotube Hybrids Using Oxide Spinel Catalysts

2019 ◽  
Vol 5 (2) ◽  
pp. 28 ◽  
Author(s):  
Bruno F. Machado ◽  
Revathi R. Bacsa ◽  
Camila Rivera-Cárcamo ◽  
Philippe Serp
Keyword(s):  
Hybrid Materials ◽  
Large Scale ◽  
Fixed Bed ◽  
Chemical Vapor ◽  
Single Step ◽  
Fixed Bed Reactor ◽  
High Yield ◽  
Layer Graphene ◽  
Cvd Synthesis ◽  
Few Layer Graphene

Functional 3D materials can be developed from graphene-based hybrids by introducing other nanomaterials, with multi-walled carbon nanotubes (CNTs) being the most studied additive. For large-scale applications, few-layer graphene (FLG)-CNT hybrids are produced by catalytic chemical vapor deposition (c-CVD) starting from a mixture of catalysts (one for FLG and one for CNTs) in the required proportions. Due to the difference in growth kinetics between CNTs and FLG, the composition of such hybrids is not well controlled. In this study, we report the single-step preparation of FLG-CNT hybrid materials by a fixed-bed c-CVD process using a single catalyst with the formula AlxCo1−xFe2O4 (x = 0.025–0.10). Different catalysts (with varying x) were prepared by the citrate–nitrate gel combustion method. Then, c-CVD synthesis was carried out at 650 °C in a horizontal fixed-bed reactor using ethylene as the carbon source. Only FLG was obtained when using CoFe2O4. However, the introduction of small amounts of Al (x < 0.05) induced the simultaneous production of CNTs, leading to the formation of uniform FLG-CNT hybrids. For catalysts with higher Al content (e.g., AlCoFeO4), CNTs were selectively produced. Thus, we observed the existence of a narrow Al-doping window, where CNTs and FLG can be obtained simultaneously. Our results can pave the way to developing high-yield single catalyst-based CVD synthesis of FLG-CNT hybrid materials.

scholarly journals Dynamics of carbon nanotube-based mode-locking fiber lasers

Nanophotonics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 2731-2761 ◽  
Author(s):  
Lin Huang ◽  
Yusheng Zhang ◽  
Xueming Liu
Keyword(s):  
Carbon Nanotube ◽  
Fiber Lasers ◽  
Modulation Depth ◽  
Laser System ◽  
Physical Nature ◽  
Mode Locking ◽  
Environmental Stability ◽  
Saturation Intensity ◽  
Soliton Dynamics ◽  
Deep Modulation

AbstractCarbon nanotube (CNT) can work as excellent saturable absorber (SA) due to its advantages of fast recovery, low saturation intensity, polarization insensitivity, deep modulation depth, broad operation bandwidth, outstanding environmental stability, and affordable fabrication. Its successful application as SA has promoted the development of scientific research and practical application of mode-locked fiber lasers. Besides, mode-locked fiber laser constitutes an ideal platform for investigating soliton dynamics which exhibit profound nonlinear optical dynamics and excitation ubiquitous in many fields. Up to now, a variety of soliton dynamics have been observed. Among these researches, CNT-SA is a key component that suppresses the environmental perturbation and optimizes the laser system to reveal the true highly stochastic and non-repetitive unstable phenomena of the initial self-starting lasing process. This review is intended to provide an up-to-date introduction to the development of CNT-SA based ultrafast fiber lasers, with emphasis on recent progress in real-time buildup dynamics of solitons in CNT-SA mode-locked fiber lasers. It is anticipated that study of dynamics of solitons can not only further reveal the physical nature of solitons, but also optimize the performance of ultrafast fiber lasers and eventually expand their applications in different fields.

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
Sign in / Sign up

Export Citation Format

Share Document