The effects of annealing temperature on the permittivity and electromagnetic attenuation performance of reduced graphene oxide

2018 ◽  
Vol 112 (19) ◽  
pp. 192902 ◽  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Annealing Temperature ◽  
Reduced Graphene

Fully Suspended Reduced Graphene Oxide Photodetector with Annealing Temperature-Dependent Broad Spectral Binary Photoresponses

ACS Photonics ◽  
2017 ◽  
Vol 4 (11) ◽  
pp. 2797-2806 ◽  
Author(s):  
Yang Cao ◽  
Hua Yang ◽  
Yajing Zhao ◽  
Yue Zhang ◽  
Tingting Ren ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Annealing Temperature ◽  
Temperature Dependent ◽  
Reduced Graphene

Ultra-broadband self-powered reduced graphene oxide photodetectors with annealing temperature-dependent responsivity

Carbon ◽  
2019 ◽  
Vol 153 ◽  
pp. 274-284 ◽  
Author(s):  
Jianguo Wen ◽  
Yingying Niu ◽  
Pengfei Wang ◽  
Meng Chen ◽  
Weidong Wu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Annealing Temperature ◽  
Temperature Dependent ◽  
Reduced Graphene ◽  
Self Powered

scholarly journals Thermally Reduced Graphene Oxide/Carbon Nanotube Composite Films for Thermal Packaging Applications

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 317 ◽  
Author(s):  
Guang-jie Yuan ◽  
Jie-Fei Xie ◽  
Hao-Hao Li ◽  
Bo Shan ◽  
Xiao-Xin Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Tensile Strength ◽  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Composite Film ◽  
Reduced Graphene Oxide ◽  
Annealing Temperature ◽  
Composite Films ◽  
Reduced Graphene

Thermally reduced graphene oxide/carbon nanotube (rGO/CNT) composite films were successfully prepared by a high-temperature annealing process. Their microstructure, thermal conductivity and mechanical properties were systematically studied at different annealing temperatures. As the annealing temperature increased, more oxygen-containing functional groups were removed from the composite film, and the percentage of graphene continuously increased. When the annealing temperature increased from 1100 to 1400 °C, the thermal conductivity of the composite film also continuously increased from 673.9 to 1052.1 W m−1 K−1. Additionally, the Young’s modulus was reduced by 63.6%, and the tensile strength was increased by 81.7%. In addition, the introduction of carbon nanotubes provided through-plane thermal conduction pathways for the composite films, which was beneficial for the improvement of their through-plane thermal conductivity. Furthermore, CNTs apparently improved the mechanical properties of rGO/CNT composite films. Compared with the rGO film, 1 wt% CNTs reduced the Young’s modulus by 93.3% and increased the tensile strength of the rGO/CNT composite film by 60.3%, which could greatly improve its flexibility. Therefore, the rGO/CNT composite films show great potential for application as thermal interface materials (TIMs) due to their high in-plane thermal conductivity and good mechanical properties.

scholarly journals Investigation of Thermal Annealing Condition on the Optical and Electrical Properties of Hybrid Silver Nanowires/Reduced Graphene Oxide (AgNWS/rGO) Films

2014 ◽  
Vol 24 (3S1) ◽  
pp. 64-70
Author(s):  
Hoang Thi Thu ◽  
Huynh Tran My Hoa ◽  
Pham Hoai Phuong ◽  
Nguyen Huynh Nhu ◽  
Tran Quang Trung ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Sheet Resistance ◽  
Thermal Annealing ◽  
Annealing Temperature ◽  
Silver Nanowires ◽  
Hybrid Structure ◽  
Preparation Conditions ◽  
Ito Film ◽  
Reduced Graphene

Herein we report a electrode in the hybrid  structure of the silver nanowires (AgNWs) with reduced graphene oxide (rGO) deposited on glass or PET substrate. The assembly and contacting in procedures of this hybrid film have been strongly affected by preparation conditions, especially annealing temperature. In this work, we have investigated the effects of thermal annealing on interconnected at nanowire junctions and between AgNWS network and rGO films via their sheet resistance and transmission. The annealing temperature was varied from 120\(^{\circ}\)C to 180\(^{\circ}\)C with 10\(^{\circ}\)C step to find out optimal temperature at which the wires can be joined together. The results show that at 170\(^{\circ}\)C, the sheet resistance and transmission of the hybrid rGO/Ag NW film are \(R_{s} = 10.7\;\Omega\) sq\(^{ - 1 }\) and \(T = 77\)% (at wavelength 550 nm) corresponding to the ratio of direct conductivity to optical conductivity \(\sigma _{DC}/\sigma _{OP} = 126\) which is the best obtained value. It is expected that the hybrid AgNWS/rGO film can replace ITO film in the near future.

scholarly journals Development of highly faceted reduced graphene oxide-coated copper oxide and copper nanoparticles on a copper foil surface

2016 ◽  
Vol 7 ◽  
pp. 1010-1017 ◽  
Author(s):  
Rebeca Ortega-Amaya ◽  
Yasuhiro Matsumoto ◽  
Andrés M Espinoza-Rivas ◽  
Manuel A Pérez-Guzmán ◽  
Mauricio Ortega-López
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Copper Oxide ◽  
Reduced Graphene Oxide ◽  
Copper Nanoparticles ◽  
Copper Foil ◽  
Annealing Temperature ◽  
Copper Oxide Nanoparticles ◽  
Hybrid Nanostructures ◽  
Reduced Graphene

This work describes the formation of reduced graphene oxide-coated copper oxide and copper nanoparticles (rGO-Cu2ONPs, rGO-CuNPs) on the surface of a copper foil supporting graphene oxide (GO) at annealing temperatures of 200–1000 °C, under an Ar atmosphere. These hybrid nanostructures were developed from bare copper oxide nanoparticles which grew at an annealing temperature of 80 °C under nitrogen flux. The predominant phase as well as the particle size and shape strongly depend on the process temperature. Characterization with transmission electron microscopy and scanning electron microscopy indicates that Cu or Cu2O nanoparticles take rGO sheets from the rGO network to form core–shell Cu–rGO or Cu2O–rGO nanostructures. It is noted that such ones increase in size from 5 to 800 nm as the annealing temperature increases in the 200–1000 °C range. At 1000 °C, Cu nanoparticles develop a highly faceted morphology, displaying arm-like carbon nanorods that originate from different facets of the copper crystal structure.

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