Determination of mechanical properties of carbon nanotubes and vertically aligned carbon nanotube forests using nanoindentation

The important influence of Al on Fe and Co catalyzed growth of vertically aligned carbon nanotube forests between layers of a lamellar support is reported.

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Effect of electric field on creep and stress-relaxation behavior of carbon nanotube forests

RSC Advances ◽

10.1039/c6ra16091c ◽

2016 ◽

Vol 6 (72) ◽

pp. 67685-67692 ◽

Cited By ~ 1

Author(s):

Piyush Jagtap ◽

Amit Kumar ◽

Praveen Kumar

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Stress Relaxation ◽

Electric Field ◽

Vertically Aligned Carbon Nanotubes ◽

Stress Relaxation Behavior ◽

Aligned Carbon Nanotubes ◽

Vertically Aligned ◽

Creep And Stress Relaxation ◽

Carbon Nanotube Forests

Carbon nanotube forests (CNTFs) are porous ensembles of vertically aligned carbon nanotubes, exhibiting excellent reversible compressibility and electric field tunable stress–strain, creep, and viscoelastic responses.

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Investigation on Site Density of Carbon Nanotube Forests

MRS Proceedings ◽

10.1557/proc-1018-ee05-12 ◽

2007 ◽

Vol 1018 ◽

Author(s):

Zhengchun Liu ◽

Sang Hwui Lee ◽

Navdeep Bajwa ◽

Lijie Ci ◽

Swastik Kar ◽

...

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Vertically Aligned Carbon Nanotubes ◽

Density Distributions ◽

Site Density ◽

Aligned Carbon Nanotubes ◽

Vertically Aligned ◽

Carbon Nanotube Forests ◽

Micrometer Scale ◽

Walled Cnts

AbstractWe report on a method for direct measurement of site density of vertically-aligned carbon nanotubes (CNTs). Site density is an important parameter of vertically-aligned carbon nanotube forests for various applications. By freezing the CNT forests in a polymer matrix and exposing the CNT ends, we obtained the site density of vertically aligned multi-walled CNTs through SEM observation and particle counting. Site densities of multi-walled CNTs grown by two different CVD processes, ferrocene/xylene process and Fe-Al/ethylene process, were measured to be ∼10 tubes/Ým2 and ∼53 tubes/Ým2, respectively. The results of site density distributions indicate non-uniform growth of carbon nanotubes at the micrometer scale in both processes.

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Fabrication of Carbon Nanotube Triode Using Helicon Plasma Cvd with Electroplated Nico Catalyst

MRS Proceedings ◽

10.1557/proc-772-m7.4 ◽

2003 ◽

Vol 772 ◽

Author(s):

Masakazu Muroyama ◽

Kazuto Kimura ◽

Takao Yagi ◽

Ichiro Saito

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Metal Catalyst ◽

Ni Catalyst ◽

Plasma Cvd ◽

Helicon Plasma ◽

Plasma Enhanced Cvd ◽

Turn On ◽

Aligned Carbon Nanotubes ◽

Vertically Aligned

AbstractA carbon nanotube triode using Helicon Plasma-enhanced CVD with electroplated NiCo catalyst has been successfully fabricated. Isolated NiCo based metal catalyst was deposited at the bottom of the cathode wells by electroplating methods to control the density of carbon nanotubes and also reduce the activation energy of its growth. Helicon Plasma-enhanced CVD (HPECVD) has been used to deposit nanotubes at 400°C. Vertically aligned carbon nanotubes were then grown selectively on the electroplated Ni catalyst. Field emission measurements were performed with a triode structure. At a cathode to anode gap of 1.1mm, the turn on voltage for the gate was 170V.

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Investigation of anisotropic reflectance from densified arrays of vertically aligned carbon nanotube forests (VACNTs)

Chemical Physics Letters ◽

10.1016/j.cplett.2016.06.074 ◽

2016 ◽

Vol 658 ◽

pp. 343-346 ◽

Cited By ~ 2

Author(s):

Masud Rana ◽

M.R. Mohd Asyraf ◽

T. Saleh ◽

Asan G.A. Muthalif

Keyword(s):

Carbon Nanotube ◽

Vertically Aligned ◽

Carbon Nanotube Forests

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Mechanical Properties Of Polyaniline / Multi-walled Carbon Nanotube Composite Films

MRS Proceedings ◽

10.1557/proc-791-q10.3 ◽

2003 ◽

Vol 791 ◽

Cited By ~ 4

Author(s):

P. C. Ramamurthy ◽

W. R. Harrell ◽

R. V. Gregory ◽

B. Sadanadan ◽

A. M. Rao

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Carbon Nanotube ◽

Composite Films ◽

Weight Percent ◽

Organic Electronic Devices ◽

Multiwalled Carbon ◽

Multi Walled Carbon Nanotube ◽

Contact Devices ◽

Carbon Nanotube Composite

ABSTRACTHigh molecular weight polyaniline / multi-walled carbon nanotube composite films were fabricated using solution processing. Composite films with various weight percentages of multiwalled carbon nanotubes were fabricated. Physical properties of these composites were analyzed by thermogravimetric analysis, tensile testing, and scanning electron microscopy. These results indicate that the addition of multiwalled nanotubes to polyaniline significantly enhances the mechanical properties of the films. In addition, metal–semiconductor (composite) (MS) contact devices were fabricated, and it was observed that the current level in the films increased with increasing multiwalled nanotube content. Furthermore, it was observed that polyaniline containing one weight percent of carbon nanotubes appears to be the most promising composition for applications in organic electronic devices.

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Growth and structural discrimination of cortical neurons on randomly oriented and vertically aligned dense carbon nanotube networks

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.5.169 ◽

2014 ◽

Vol 5 ◽

pp. 1575-1579 ◽

Cited By ~ 5

Author(s):

Christoph Nick ◽

Sandeep Yadav ◽

Ravi Joshi ◽

Christiane Thielemann ◽

Jörg J Schneider

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Cortical Neurons ◽

Three Dimensional ◽

Vertically Aligned Carbon Nanotubes ◽

Aligned Carbon Nanotubes ◽

Vertically Aligned ◽

The Individual ◽

Carbon Nanotube Networks ◽

Communication Paths

The growth of cortical neurons on three dimensional structures of spatially defined (structured) randomly oriented, as well as on vertically aligned, carbon nanotubes (CNT) is studied. Cortical neurons are attracted towards both types of CNT nano-architectures. For both, neurons form clusters in close vicinity to the CNT structures whereupon the randomly oriented CNTs are more closely colonised than the CNT pillars. Neurons develop communication paths via neurites on both nanoarchitectures. These neuron cells attach preferentially on the CNT sidewalls of the vertically aligned CNT architecture instead than onto the tips of the individual CNT pillars.

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A sweet spot for highly efficient growth of vertically aligned single-walled carbon nanotube forests enabling their unique structures and properties

Nanoscale ◽

10.1039/c5nr05537g ◽

2016 ◽

Vol 8 (1) ◽

pp. 162-171 ◽

Cited By ~ 38

Author(s):

Guohai Chen ◽

Robert C. Davis ◽

Don N. Futaba ◽

Shunsuke Sakurai ◽

Kazufumi Kobashi ◽

...

Keyword(s):

Carbon Nanotube ◽

Sweet Spot ◽

Efficient Synthesis ◽

Single Walled Carbon Nanotube ◽

Single Walled Carbon ◽

Highly Efficient ◽

Structures And Properties ◽

Vertically Aligned ◽

Carbon Nanotube Forests

We report the existence of a SWCNT “sweet spot” in the CNT diameter and spacing domain for highly efficient synthesis, within which SWCNTs possessed a unique set of characteristics.

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