scholarly journals Carbon Nanotube Surface Regular Topography Improves Cell Response, Depending on Cell Passage

2016 ◽  
Vol 7 ◽  
pp. BTRI.S30485
Author(s):  
A. Kroustalli ◽  
D. Deligianni
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Random Network ◽  
Focal Adhesions ◽  
Human Mesenchymal Stem Cells ◽  
Multiwalled Carbon ◽  
Integrin Clustering ◽  
Subsequent Behavior ◽  
Vertically Aligned ◽  
Surface Morphologies

Through mediation of integrin clustering, nanoscale surface structure of carbon nanotubes (CNTs) directly affects cell binding and subsequent behavior. The influence of morphological structures on proliferation, differentiation, and organization of focal adhesions and cytoskeleton of human mesenchymal stem cells (hMSCs) was studied. The following two surface morphologies were fabricated and examined: a random network multiwalled carbon nanotubes film (RNCNT) and a vertically aligned multiwalled carbon nanotube (VACNT) film. hMSCs adhered and spread earlier on both CNT surfaces than on control. A statistically significantly increased number of attached cells were observed on VACNT surfaces. No CNT substrate enhanced differentiation, but both maintained the differentiation property of hMSCs. VACNTs recruited vinculin from the cytoplasm for the formation of focal adhesion complexes earlier in comparison to RNCNT. There is still disparity on how nanostructures regulate the progression toward an osteoblastic phenotype. It is necessary to explore various architectures in order to understand how they initiate osteoinductive or proliferating signals.

scholarly journals Optical bandgap modelling from the structural arrangement of carbon nanotubes

Nanoscale ◽  
2018 ◽  
Vol 10 (22) ◽  
pp. 10683-10690
Author(s):  
Timothy P. Butler ◽  
Ijaz Rashid ◽  
Yunuen Montelongo ◽  
Gehan A. J. Amaratunga ◽  
Haider Butt
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Spectral Studies ◽  
Nanotube Arrays ◽  
Multiwalled Carbon ◽  
Structural Arrangement ◽  
Periodic Arrays ◽  
Carbon Nanotube Arrays ◽  
Vertically Aligned

Spectral studies on the periodic arrays of vertically-aligned multiwalled carbon nanotube arrays.

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 A Review: Carbon Nanotube-Based Piezoresistive Strain Sensors

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Waris Obitayo ◽  
Tao Liu
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Composite Films ◽  
Strain Sensors ◽  
Voltage Response ◽  
Strain Sensing ◽  
Multiwalled Carbon ◽  
Sensing Applications ◽  
Mechanical Deformations ◽  
Electrical Resistivities

The use of carbon nanotubes for piezoresistive strain sensors has acquired significant attention due to its unique electromechanical properties. In this comprehensive review paper, we discussed some important aspects of carbon nanotubes for strain sensing at both the nanoscale and macroscale. Carbon nanotubes undergo changes in their band structures when subjected to mechanical deformations. This phenomenon makes them applicable for strain sensing applications. This paper signifies the type of carbon nanotubes best suitable for piezoresistive strain sensors. The electrical resistivities of carbon nanotube thin film increase linearly with strain, making it an ideal material for a piezoresistive strain sensor. Carbon nanotube composite films, which are usually fabricated by mixing small amounts of single-walled or multiwalled carbon nanotubes with selected polymers, have shown promising characteristics of piezoresistive strain sensors. Studies also show that carbon nanotubes display a stable and predictable voltage response as a function of temperature.

Fast Preparation of Hydroxyapatite/Superhydrophilic Vertically Aligned Multiwalled Carbon Nanotube Composites for Bioactive Application

Langmuir ◽  
2010 ◽  
Vol 26 (23) ◽  
pp. 18308-18314 ◽  
Author(s):  
Anderson O. Lobo ◽  
Marcus A. F. Corat ◽  
Sandra C. Ramos ◽  
Jorge T. Matsushima ◽  
Alessandro E. C. Granato ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Nanotube Composites ◽  
Vertically Aligned ◽  
Carbon Nanotube Composites

Neuron-like polyelectrolyte–carbon nanotube composites for ultra-high loading of metal nanoparticles

2014 ◽  
Vol 38 (10) ◽  
pp. 4799-4806 ◽  
Author(s):  
Md. Shahinul Islam ◽  
Won San Choi ◽  
Tae Sung Bae ◽  
Young Boo Lee ◽  
Ha-Jin Lee
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Metal Nanoparticles ◽  
Multiwalled Carbon Nanotubes ◽  
High Loading ◽  
Multiwalled Carbon ◽  
Simple Protocol ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

We report a simple protocol for the fabrication of multiwalled carbon nanotubes (MWCNTs) with a neuron-like structure for loading ultra-high densities of metal nanoparticles (NPs).

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

2003 ◽  
Vol 791 ◽  
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.

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 Autonomous self-healing multiwalled carbon nanotube nanocomposites with piezoresistive effect

RSC Advances ◽  
2017 ◽  
Vol 7 (33) ◽  
pp. 20422-20429 ◽  
Author(s):  
Tongfei Wu ◽  
Biqiong Chen
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon Nanotube ◽  
Self Healing ◽  
Multiwalled Carbon ◽  
Piezoresistive Effect

Viscoelastic rubber reinforced by multiwalled carbon nanotubes exhibited rapid, autonomous, mechanically and electrically self-healing properties and piezoresistive behavior.

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