Investigation on Site Density of Carbon Nanotube Forests

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.

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

RSC Advances ◽  
2016 ◽  
Vol 6 (72) ◽  
pp. 67685-67692 ◽  
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.

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

2014 ◽  
Vol 5 ◽  
pp. 1575-1579 ◽  
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.

scholarly journals Gas sensing with gold-decorated vertically aligned carbon nanotubes

2014 ◽  
Vol 5 ◽  
pp. 910-918 ◽  
Author(s):  
Prasantha R Mudimela ◽  
Mattia Scardamaglia ◽  
Oriol González-León ◽  
Nicolas Reckinger ◽  
Rony Snyders ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Nitrogen Dioxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Chemical Vapor ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Carbon Nanotube Forests

Vertically aligned carbon nanotubes of different lengths (150, 300, 500 µm) synthesized by thermal chemical vapor deposition and decorated with gold nanoparticles were investigated as gas sensitive materials for detecting nitrogen dioxide (NO2) at room temperature. Gold nanoparticles of about 6 nm in diameter were sputtered on the top surface of the carbon nanotube forests to enhance the sensitivity to the pollutant gas. We showed that the sensing response to nitrogen dioxide depends on the nanotube length. The optimum was found to be 300 µm for getting the higher response. When the background humidity level was changed from dry to 50% relative humidity, an increase in the response to NO2 was observed for all the sensors, regardless of the nanotube length.

scholarly journals Vertically aligned carbon nanotubes: production and applications for environmental sustainability

2018 ◽  
Vol 20 (23) ◽  
pp. 5245-5260 ◽  
Author(s):  
Wenbo Shi ◽  
Desiree L. Plata
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Green Chemistry ◽  
Environmental Sustainability ◽  
Environmental Benefits ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

Incorporate green chemistry principles into vertically aligned carbon nanotube production and leverage their properties to maximize environmental benefits.

A flexible, nonenzymatic glucose biosensor based on Ni-coordinated, vertically aligned carbon nanotube arrays

RSC Advances ◽  
2014 ◽  
Vol 4 (89) ◽  
pp. 48310-48316 ◽  
Author(s):  
Wan-Sun Kim ◽  
Gi-Ja Lee ◽  
Je-Hwang Ryu ◽  
KyuChang Park ◽  
Hun-Kuk Park
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Glucose Biosensor ◽  
Graphite Substrate ◽  
Nanotube Arrays ◽  
Vertically Aligned Carbon Nanotubes ◽  
Carbon Nanotube Arrays ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Flexible Graphite

We evaluated the use of flexible biosensors based on Ni-coordinated, vertically aligned carbon nanotubes on a flexible graphite substrate (Ni/VCNTs/G) for the nonenzymatic electrochemical detection of glucose.

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

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.

Correlation and Comparison Between Thermodynamic Aspects and Cytocompatibility of Cells on Superhydrophobic and Superhydrophilic Vertically Aligned Carbon Nanotubes

2013 ◽  
Vol 3 (2) ◽  
pp. 155-165 ◽  
Author(s):  
Teresa C.O. Marsi ◽  
Marcus A.F. Corat ◽  
Mirian M. Machado ◽  
Evaldo J. Corat ◽  
Fernanda R. Marciano ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned
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