scholarly journals Carbon Nanotubes: Tailoring the Mechanical Properties of High-Aspect-Ratio Carbon Nanotube Arrays using Amorphous Silicon Carbide Coatings (Adv. Funct. Mater. 36/2014)

2014 ◽  
Vol 24 (36) ◽  
pp. 5736-5736
Author(s):  
René H. Poelma ◽  
Bruno Morana ◽  
Sten Vollebregt ◽  
Erik Schlangen ◽  
Henk W. van Zeijl ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Silicon Carbide ◽  
Carbon Nanotube ◽  
Aspect Ratio ◽  
Amorphous Silicon ◽  
High Aspect Ratio ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays ◽  
Carbide Coatings

Growth and electrical characterization of high-aspect-ratio carbon nanotube arrays

Carbon ◽  
2006 ◽  
Vol 44 (2) ◽  
pp. 253-258 ◽  
Author(s):  
Lingbo Zhu ◽  
Jianwen Xu ◽  
Yonghao Xiu ◽  
Yangyang Sun ◽  
Dennis W. Hess ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Electrical Characterization ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays

Functionalization and Tip-open of Carbon Nanotubes for High-Performance Symmetric Supercapacitor

2021 ◽  
Author(s):  
Yaxiong Zhang ◽  
Erqing Xie
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Aspect Ratio ◽  
Specific Surface ◽  
Surface Area ◽  
Chemical Stability ◽  
High Aspect Ratio ◽  
High Performance ◽  
Large Specific Surface Area ◽  
Symmetric Supercapacitor

Carbon nanotubes (CNTs) have been widely studied as supercapacitor electrodes because of their excellent conductivity, high aspect ratio, excellent mechanical properties, chemical stability, and large specific surface area. However, the...

scholarly journals The shape of the orientation distribution of carbon nanotubes in aligned arrays

2014 ◽  
Vol 70 (a1) ◽  
pp. C596-C596
Author(s):  
Ulla Vainio ◽  
Thea Schnoor ◽  
Sarathlal Koyiloth Vayalil ◽  
Karl Schulte ◽  
Martin Müller ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Iron Catalyst ◽  
Chemical Vapour ◽  
Orientation Distribution ◽  
Steric Interaction ◽  
Nanotube Arrays ◽  
X Ray ◽  
Carbon Nanotube Arrays ◽  
Vertically Aligned

Recent simulations of vertically aligned carbon nanotube arrays have shown that the shape of the orientation distribution of nanotubes within the array has a drastic effect on the electrical properties of the array. Orienting of shape-anisotropic objects can be carried out in several different ways such as shearing, magnetically steering, or by vibrating the objects. Nevertheless, perfect orientation is difficult if not impossible to achieve. In the case of the growth of carbon nanotube arrays, self-confinement can occur affecting the resultant orientation distribution. Yet so far the shape of the orientation distribution has not been quantified in great detail and it has been mostly assumed to be Gaussian or Lorentzian. In the present work, multi-walled carbon nanotube arrays were grown via aerosol-assisted chemical vapour deposition with iron catalyst and investigated using small-angle X-ray scattering, a method perfectly suited to characterizing the orientation of carbon nanotubes. Using a microfocused X-ray beam of 24 μm x 17 μm in size at beamline P03 of the PETRA III synchrotron storage ring in Hamburg, we determined the orientation distribution of the vertically aligned carbon nanotubes along the film height. Remarkably, the packing density of the carbon nanotubes seems to correlate not only with the width of the distribution but also its shape. The shape of the orientation distribution was then compared to that from different oriented systems. These findings indicate that by using alignment methods that are based on steric interaction between particles, such as shearing or self-confinement during particle growth, the system will reach an alignment with an orientation distribution closer to the Laplace distribution than to the normal distribution. Such a finding has profound implications for simulation studies of mechanical, electrical and other properties of many hierarchical materials.

scholarly journals Resonance Raman and IR spectroscopy of aligned carbon nanotube arrays with extremely narrow diameters prepared with molecular catalysts on steel substrates

2017 ◽  
Vol 19 (45) ◽  
pp. 30667-30674 ◽  
Author(s):  
Sagar Motilal Jain ◽  
Federico Cesano ◽  
Domenica Scarano ◽  
Tomas Edvinsson
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Ir Spectroscopy ◽  
Resonance Raman ◽  
Nanotube Arrays ◽  
Molecular Catalyst ◽  
Carbon Nanotube Arrays ◽  
Molecular Catalysts ◽  
Steel Substrates ◽  
Raman And Ir Spectroscopy

Resonance and IR spectroscopy of carbon nanotubes with extremely narrow diameters grown directly on steel grids using a molecular catalyst.

Fabrication and mechanical properties of carbon nanotube yarns spun from ultra-long multi-walled carbon nanotube arrays

Carbon ◽  
2012 ◽  
Vol 50 (12) ◽  
pp. 4579-4587 ◽  
Author(s):  
Adrian Ghemes ◽  
Yoshitaka Minami ◽  
Junichi Muramatsu ◽  
Morihiro Okada ◽  
Hidenori Mimura ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Nanotube Yarns

Evaluation of mechanical and dynamic mechanical properties of multiwalled carbon nanotube-based ethylene–propylene copolymer composites mixed by masterbatch dilution

2016 ◽  
Vol 50 (29) ◽  
pp. 4093-4101 ◽  
Author(s):  
Maija Hoikkanen ◽  
Minna Poikelispää ◽  
Amit Das ◽  
Uta Reuter ◽  
Wilma Dierkes ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Aspect Ratio ◽  
Melt Mixing ◽  
Multiwalled Carbon ◽  
Mixing Processes ◽  
Ethylene Propylene ◽  
Dynamic Mechanical ◽  
Mixing Method

A two-step masterbatch mixing technique was studied for preparation of carbon nanotube-filled ethylene–propylene diene elastomer compounds, and compared to conventional one-step mixing process. In the two-step process, a masterbatch compound with carbon nanotube content of 50 parts per hundred was prepared by melt-mixing ethylene–propylene diene elastomer. This material was then compounded with pristine ethylene–propylene diene elastomer and composites with different carbon nanotube concentrations were compared. The aim of this study is to compare the efficiency of two different mixing processes on the dispersion of carbon nanotubes and to facilitate the handling of carbon nanotubes, as the masterbatch can be prepared in a controlled way and used for further dilution without the problems related to carbon nanotube processing. The compound properties were studied with emphasis on mechanical characterization and dynamic mechanical thermal analysis. Masterbatch mixing resulted in the similar mechanical properties of the composites compared to the direct mixing method. At the relatively low loadings of carbon nanotubes, the considerable improvements of the mechanical properties were observed. The aspect ratio of the carbon nanotubes determined by transmission electron microscope was found to be similar to the one calculated from the Guth equation. It showed a considerable reduction in aspect ratio independent of the used mixing method.

In situ synthesis of metal oxides in carbon nanotube arrays and mechanical properties of the resulting structures

Carbon ◽  
2012 ◽  
Vol 50 (12) ◽  
pp. 4432-4440 ◽  
Author(s):  
Jordan R. Raney ◽  
Hong-Li Zhang ◽  
Daniel E. Morse ◽  
Chiara Daraio
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Metal Oxides ◽  
In Situ Synthesis ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays
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