Multiwall carbon nanotubes: Self-organization and inhibition of step-flow growth kinetics

2001 ◽  
Vol 89 (6) ◽  
pp. 3438-3446 ◽  
Author(s):  
Oleg A. Louchev ◽  
Yoichiro Sato ◽  
Hisao Kanda
Keyword(s):  
Carbon Nanotubes ◽  
Growth Kinetics ◽  
Multiwall Carbon Nanotubes ◽  
Self Organization ◽  
Step Flow ◽  
Step Flow Growth ◽  
Multiwall Carbon

Electric Field Effects on Self-Organization Processes during Droplet Evaporation of Multiwall Carbon Nanotube Aqueous Suspension

2018 ◽  
Vol 936 ◽  
pp. 25-30
Author(s):  
A.P. Kuzmenko ◽  
N.A. Khokhlov ◽  
Thet Phyo Naing ◽  
Myo Min Than
Keyword(s):  
Carbon Nanotubes ◽  
Electric Field ◽  
Aqueous Suspension ◽  
Multiwall Carbon Nanotubes ◽  
Droplet Evaporation ◽  
Self Organization ◽  
Uniform Electric Field ◽  
Multiwall Carbon Nanotube ◽  
Walled Carbon Nanotubes ◽  
Multiwall Carbon

The self-organization of COOH-functionalized multiwall carbon nanotubes (MWCNTs) during droplet evaporation of their aqueous suspension in a constant uniform electric field (E) was investigated. It was established that the COOH-functionalization polarizes the MWCNTs in the transverse direction to their axis. Depending on their size, MWCNTs tended to agglomerate into three different stable structures in different drop regions. There were linear, fractal and cluster structures (LS, FS, and CS). Sizes of the FSs decreased as 1/Е, whereas the rate of their growth increased as Е2. The single-walled carbon nanotubes (SWCNTs) were found inside the LSs and CSs. The chiral indices of the SWCNTs were determined, corresponding to metallic and semiconducting conductivities. An analysis showed that as a result of coagulation and amassment of the carbon nanotubes (CNTs) near electrodes, there were formed conductive regions. When the concentration of MWCNTs reached some value in part nearest to an electrode, this part became conductive. The positive and negative electrodes, formed now by MWCNTs, shifted towards each other. The observed effects show that considered self-organization is controllable by the electric field.

Boehmite Nanofibers as a Dispersant for Nanotubes in an Aqueous Sol

2018 ◽  
Author(s):  
Gen Hayase
Keyword(s):  
Carbon Nanotubes ◽  
Aspect Ratio ◽  
Aqueous Solutions ◽  
High Aspect Ratio ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon ◽  
Nanotube Films

By exploiting the dispersibility and rigidity of boehmite nanofibers (BNFs) with a high aspect ratio of 4 nm in diameter and several micrometers in length, multiwall-carbon nanotubes (MWCNTs) were successfully dispersed in aqueous solutions. In these sols, the MWCNTs were dispersed at a ratio of about 5–8% relative to BNFs. Self-standing BNF–nanotube films were also obtained by filtering these dispersions and showing their functionality. These films can be expected to be applied to sensing materials.

scholarly journals Comparative study of using Water-Based mud containing Multiwall Carbon Nanotubes versus Oil-Based mud in HPHT fields

2016 ◽  
Vol 25 (4) ◽  
pp. 459-464 ◽  
Author(s):  
M.I. Abduo ◽  
A.S. Dahab ◽  
Hesham Abuseda ◽  
Abdulaziz M. AbdulAziz ◽  
M.S. Elhossieny
Keyword(s):  
Carbon Nanotubes ◽  
Comparative Study ◽  
Multiwall Carbon Nanotubes ◽  
Water Based ◽  
Multiwall Carbon

Multiwall Carbon Nanotubes Non-covalently Functionalized by Porphyrin–Sn Networks for Protein Adsorption

2021 ◽  
Vol 4 (3) ◽  
pp. 2345-2350
Author(s):  
Chaofeng Wang ◽  
Yi Hao ◽  
Yue Wang ◽  
Huijia Song ◽  
Sameer Hussain ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Protein Adsorption ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon

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.

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