On the oxidation degree of few-layer graphene oxide sheets obtained from chemically oxidized multiwall carbon nanotubes

Carbon ◽  
2015 ◽  
Vol 81 ◽  
pp. 405-417 ◽  
Author(s):  
D. Torres ◽  
J.L. Pinilla ◽  
R. Moliner ◽  
I. Suelves
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Multiwall Carbon Nanotubes ◽  
Oxidation Degree ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Multiwall Carbon ◽  
Graphene Oxide Sheets

scholarly journals A unique strategy towards high dielectric constant and low loss with multiwall carbon nanotubes anchored onto graphene oxide sheets

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 24132-24138 ◽  
Author(s):  
Sourav Biswas ◽  
Goutam Prasanna Kar ◽  
Deepshikha Arora ◽  
Suryasarathi Bose
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Multiwall Carbon Nanotubes ◽  
Coupling Reactions ◽  
Low Loss ◽  
Electron Microscopic ◽  
High Dielectric ◽  
Multiwall Carbon ◽  
Microscopic Techniques ◽  
Graphene Oxide Sheets

Multiwall carbon nanotubes (MWNTs) were anchored onto graphene oxide sheets (GOs) via diazonium and C–C coupling reactions and characterized by spectroscopic and electron microscopic techniques.

High performance electromagnetic wave absorbers derived from PC/SAN blends containing multiwall carbon nanotubes and Fe3O4 decorated onto graphene oxide sheets

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 37633-37645 ◽  
Author(s):  
Shital Patangrao Pawar ◽  
Mounika Gandi ◽  
Suryasarathi Bose
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Electromagnetic Wave ◽  
High Performance ◽  
High Surface ◽  
Multiwall Carbon Nanotubes ◽  
Attenuation Constant ◽  
Lossy Materials ◽  
Multiwall Carbon ◽  
Graphene Oxide Sheets

A high performance electromagnetic wave absorber with high surface resistivity and enhanced attenuation constant was designed using uneven distribution of lossy materials in PC/SAN blends.

Nanobubbles stability and multiwall carbon nanotubes straightening on few-layer graphene surfaces

2011 ◽  
Vol 110 (4) ◽  
pp. 044319 ◽  
Author(s):  
S. H. Al-Harthi ◽  
M. Al-Barwani ◽  
M. Elzain ◽  
N. Al-Naamani ◽  
T. Hysen
Keyword(s):  
Carbon Nanotubes ◽  
Multiwall Carbon Nanotubes ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Multiwall Carbon

scholarly journals Comparison of Electronic Structure and Magnetic Properties of Few Layer Graphene and Multiwall Carbon Nanotubes

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Sekhar Chandra Ray
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Multiwall Carbon Nanotubes ◽  
Hysteresis Loops ◽  
Structural Defects ◽  
X Ray ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Multiwall Carbon

A comparative study has been made for the non-catalyst based few layer graphene (FLG) and Fe-catalyst based multiwall carbon nanotubes (MWCNTs). Magnetic and electronic properties of FLG and MWCNTs were studied using magnetic M-H hysteresis loops and synchrotron radiation based X-ray absorption fine structure spectroscopy measurements. Structural defects and electronic and bonding properties of FLG/MWCNTs have been studied using Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and ultraviolet photoelectron spectroscopy (UPS). The work functions of FLG and MWCNTs are 4.01 eV and 3.79 eV, respectively, obtained from UPS (He-I) spectra. UPS (He-II) results suggest that the density of states (DOS) of MWCNTs is higher than FLG and is consistent with Raman spectroscopy result that shows the defect of MWCNTs is higher than FLG. The magnetic coercivity (Hc) of the MWCNTs (~750 Oe) is higher than FLG (~85 Oe) which could be used for various technological magnetic applications.

Flexible Carbon-Based Nanogenerators

2015 ◽  
Vol 1782 ◽  
pp. 1-8
Author(s):  
Ning-Qin Deng ◽  
He Tian ◽  
Qing-Tang Xue ◽  
Zhe Wang ◽  
Hai-Ming Zhao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Energy Harvesting ◽  
Zno Nanoparticles ◽  
Output Voltage ◽  
Multiwall Carbon Nanotubes ◽  
The Other ◽  
Peak Voltage ◽  
Energy Depletion ◽  
Multiwall Carbon

ABSTRACTNanogenerators (NGs) have great potential to solve the problems of energy depletion and environmental pollution. Here, two types of flexible nanogenerators (FNGs) based on graphene oxide (GO) and multiwall carbon nanotubes (MW-CNTs) are presented. The peak output voltage and current of GO based FNG reached up to 2 V and 30 nA, respectively, under 15 N force at 1 Hz. Moreover, the output voltage could be improved to 34.4 V when the frequency was increased to 10 Hz. It was also found the output voltage increased from 0.1 V to 2.0 V using a released GO structure. The other FNG was made by MW-CNTs mixed with ZnO nanoparticles (NPs). Its output voltage and power reached up to 7.5 V and 18.75 mW, respectively, which is much larger than that of bare ZnO based FNG. Furthermore, a peak voltage of 30 V could be gained by stamping one’s foot on the FNG. Finally, a modified NG was fabricated using four springs and two flexible layers. As a result, the voltage and power reached up to 9 V and 27mW, respectively. These works may bring out broad applications in energy harvesting.

Si-mediated fabrication of reduced graphene oxide and its hybrids for electrode materials

2015 ◽  
Vol 17 (2) ◽  
pp. 776-780 ◽  
Author(s):  
Barun Kumar Barman ◽  
Karuna Kar Nanda
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrode Materials ◽  
Multiwall Carbon Nanotubes ◽  
Environmentally Friendly ◽  
Si Substrate ◽  
Reduced Graphene ◽  
Multiwall Carbon

We demonstrate a Si-mediated environmentally friendly reduction of graphene oxide (GO) and the fabrication of hybrid electrode materials with multiwall carbon nanotubes and nanofibers. The reduction of GO is facilitated by the nascent hydrogen generated by the reaction between Si and KOH. The overall process consumes 10 to 15 μm of Si each time and the same Si substrate can be used multiple times.

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