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.

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.

Thermal-CVD System Designed for Growth of Carbon Nanotubes

2006 ◽  
Author(s):  
Samuele Porro ◽  
Simone Musso ◽  
Massimo Rovere ◽  
Mauro Giorcelli ◽  
Angelica Chiodoni ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor ◽  
Nitrogen Atmosphere ◽  
Metal Catalyst ◽  
Silicon Substrates ◽  
Carbon Structures ◽  
High Temperature Furnace ◽  
Aligned Carbon Nanotubes ◽  
Growth System ◽  
Vertically Aligned

We report a study on a thermal chemical vapor deposition (CVD) system optimized for the growth of well packed and vertically aligned carbon nanotubes (CNTs) on uncoated silicon substrates. The process of synthesis involves the co-evaporation of a carbon precursor and a metal catalyst in a nitrogen atmosphere inside a high temperature furnace. Beside the formation of CNTs, depending in particular on the deposition temperature, other carbon structures can be deposited, such as nanographite. We show the growth results analyzed by different characterization techniques (electron microscopy, porosity and thermal stability investigations, micro-Raman spectroscopy). In addition, we report an investigation on the development of secondary transversal vortex flows caused by the effects of distribution of temperatures inside the growth system, in order to correlate them with the growth results.

Carbon Nanotube Deposition using Helicon Plasma CVD at Low Temperature

2002 ◽  
Vol 728 ◽  
Author(s):  
Masakazu Muroyama ◽  
Takao Yagi ◽  
Kouji Inoue ◽  
Ichiro Saito
Keyword(s):  
Carbon Nanotubes ◽  
Low Temperature ◽  
Chemical Vapor ◽  
Plasma Source ◽  
Metal Catalyst ◽  
Nickel Catalysis ◽  
Helicon Plasma ◽  
Plasma Chemical Vapor Deposition ◽  
Aligned Carbon Nanotubes ◽  
Growth Method

AbstractWe developed a novel growth method of aligned carbon nanotubes. Aligned carbon nanotubes are grown on a metal catalyst on a glass substrate using biased Helicon plasma chemical vapor deposition (HPECVD) of CH4/H2 gases from 400 C to 500 C. The Helicon plasma source is one of the high-density plasma sources and is promising for low temperature carbon deposition. A Ni film was used as a catalyst to reduce the activation energy of the nanotubes' growth. The carbon nanotubes were deposited on the nickel catalysis layer selectively.

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.

Visible diffraction from quasi-crystalline arrays of carbon nanotubes

Nanoscale ◽  
2015 ◽  
Vol 7 (32) ◽  
pp. 13452-13457 ◽  
Author(s):  
Timothy P. Butler ◽  
Haider Butt ◽  
Timothy D. Wilkinson ◽  
Gehan A. J. Amaratunga
Keyword(s):  
Carbon Nanotubes ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Ni Catalyst ◽  
Large Area ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Definition Of ◽  
Nanotube Growth

Large area arrays of vertically-aligned carbon nanotubes (VACNTs) are patterned in a quasi-crystalline Penrose tile arrangement through electron beam lithography definition of Ni catalyst dots and subsequent nanotube growth by plasma-enhanced chemical vapour deposition.

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.

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.

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